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Projects &
Case Studies

A selection of our work across water resource planning, flood modelling, drainage design, groundwater simulation, and environmental consulting — alongside our published research contributions.

WRPM PROJECTS

Projects by WRPM

Engagements executed directly under the WRPM banner.

Client Name:

Seventh Day Adventist School — Location: Pudussery

Client Situation:

The school campus had been experiencing severe flooding during periods of heavy rainfall, leading to significant disruption of academic activities and damage to infrastructure.

Client Requirement:

Develop a comprehensive and sustainable mitigation strategy to address flooding, enhance drainage efficiency, and ensure long-term protection of the campus.

Project Activities:

  1. Conducted a detailed site visit and reconnaissance survey to assess existing site conditions, identify underlying causes of flooding, and define the scope of required interventions.
  2. Executed a detailed topographical survey of the campus and collected essential field data through a specialized third-party agency.
  3. Carried out soil exploration investigations through an authorized third-party agency to obtain relevant geotechnical parameters for the study.
  4. Formulated a technical approach specifying surface and subsurface drainage layouts along with campus boundary protection structures.

Benefits:

Developed a complete technical approach and design proposal featuring a comprehensive drainage layout comprising one surface drain, four subsurface drains, a collection tank, and a boundary retaining wall to prevent future flooding and secure academic infrastructure.

Client Name:

Süd-Chemie India Pvt. Ltd. — Location: Ernakulam

Client Situation:

The industrial plant's weaving stormwater drains became inadequate due to land-use changes, new construction, and intense rainfall events, leading to frequent overflows and plant operational disruptions.

Client Requirement:

Conduct a detailed study to redesign the drainage network, identify hydraulic bottlenecks, and suggest effective stormwater drainage improvements.

Project Activities:

  1. Preparation of the natural flow direction map and its modification due to the layout/constructions.
  2. Estimation of peak flow at the required points of the accumulation by incorporating the frequency intensity duration relationships.
  3. Arriving at the design discharge by incorporating the effect of climate change.
  4. Checking the adequacy of the cross section of the existing drains in carrying the design discharge at various salient points.
  5. Design of the drains at these points if they are found inadequate.
  6. Checking the adequacy of the evacuation facility for these flows from the plant to the neighbouring area/drains/rivers.
  7. Exploring alternate arrangements if the given design is technically infeasible based on other considerations.
  8. Exploring the possibility of realigning some part of drains to new locations.
  9. Evolving a proper design for the drain to cross the process drains at two places without hindering the process drains.
  10. Exploring the possibility of removing the obstructions in the drain so that smooth flow takes place.

Benefits:

Provided a complete redesign of inadequate drain sections, resolved bottleneck crossings with process lines, and mapped out efficient routing to prevent operational flooding.

Client Name:

KIFCON, Thiruvananthapuram — Location: Infopark, Kochi

Client Situation:

Infopark Kochi is a premier technology hub whose infrastructure must remain resilient against monsoon-related flooding. The campus naturally drains into the Kadambayar, which subsequently joins the Chitrapuzha river system. During recent episodes of heavy rainfall, significant inundation was observed at the lowest-lying points of the park, several of which house critical facilities. Given the vulnerability of these assets, the Client decided that an immediate hydrological and hydraulic assessment was required to evaluate the adequacy of the existing drainage system and to identify low-investment measures that could mitigate the flooding.

Client Requirement:

The Client required domain consulting support to guide flood control and mitigation planning for the campus. The core requirement was to provide immediate relief through high-impact, low-investment interventions rather than large-scale capital works, by evaluating the present drainage network and pinpointing internal bottlenecks contributing to surface water ponding.

Project Activities:

  1. Drainage Modelling: Development of a baseline model of the campus drainage network using existing and Client-provided topographical data, simulated under various rainfall scenarios.
  2. Targeted Diagnostics: Field-level identification of "low-hanging fruit" issues such as blocked culverts, accumulated debris, illegal dumping sites, and damaged drainage infrastructure.
  3. Localized Optimization: Evaluation of small-scale structural modifications by benchmarking on-site conditions against the simulated model outputs.
  4. Localized System Analysis: Modelling of the Infopark campus as an isolated hydraulic system to identify internal bottlenecks and reduce localized surface water ponding.

Benefits:

The study is expected to deliver increased runoff efficiency within the campus and a reduction in flooding during light-to-moderate rainfall events, achieved through targeted, low-cost interventions rather than major infrastructure investment — providing rapid protection to critical facilities located at the campus's low points.

Client Name:

Confident Group — Location: Ernakulam

Client Situation:

A new residential complex in Kochi needed to discharge its stormwater runoff into the public drains of the Smart City Project in compliance with local guidelines.

Client Requirement:

Estimate the design stormwater flow from the complex based on Ministry of Urban Development guidelines and size the connecting drain/pipe to the public drain.

Project Activities:

  1. Development of the IDF curve for the region.
  2. Selection of appropriate level of frequency of event for the design.
  3. Estimation of design duration and Peak flow estimation.
  4. Sizing of the drain/ pipe for carrying the water to the public drain.
  5. From the analysis, it was found that the required size of the drain was much smaller than the size which was proposed to be provided.

Benefits:

Developed IDF curves for accurate peak flow estimations and optimized the connecting pipe size, ensuring safety and compliance at a significantly reduced infrastructure cost compared to standard assumptions.

Client Name:

Southern Railway — Location: Thiruvananthapuram

Client Situation:

Southern Railways proposed to improve the Nemom station into a coaching terminal coupled with doubling of track to improve the frequency of train operations and cater to the Trivandrum Division. However, during recent rains, severe inundation occurred in the lowest point of the newly acquired land where key construction facilities were planned.

Client Requirement:

Perform a comprehensive hydrological study to assess factors affecting run-off and design an effective rainwater drainage system for the yard.

Project Activities:

  1. Collection of all data including rainfall, discharge data, topographical and hydrographic data.
  2. Delineation of watershed which drain to the Nemom yard using publicly available DEM and assess its accuracy.
  3. Estimation of peak flow and hydrographs from this watershed with the flood frequencies of 50-year, 100-year and 200-year.
  4. Estimation of non-exceedance probability of the flood during design period for different frequency.
  5. Accounting for the effect of climate change in the current scenario and fixing the design discharges for drains within and outside the yard.
  6. Checking the adequacy of the cross section of the existing cross drainages (bridges no.31,32,33, and 34) in carrying the design discharge.
  7. Hydraulic design of the cross drainages, if they are found inadequate.
  8. Re-alignment and design of internal drains within the yard.
  9. Assessing the risk of floods and fixing the ground level of parking lot and level of station building.
  10. Suggesting measures for reducing the chance of flooding to the neighbouring residential area.
  11. Delineation of watershed of Karamana river up to the intersection point of drainage from the yard and Karamana river.
  12. Estimation of peak flow of Karamana river with the flood frequency of 50-year, 100-year and 200-year floods.
  13. Arriving at the design return period for limiting the probability of exceedance during the design period to 5% or % specified by the client.
  14. Checking the adequacy of the evacuation facility for accumulated water.

Benefits:

Provided hydraulic designs for cross drainages, realigned internal yard drains, fixed safe ground levels for the station building and parking lot, and suggested flood mitigation measures for neighboring residential areas.

Client Name:

KALS Breweries Private Limited — Location: Chalakudy

Client Situation:

The client took over the Malabar Breweries (Poolani-Puzhpagiri Rd, Poolany, Chalakudy), which was in a dilapidated condition owing to the inundation of the entire plant during previous major floods. The client renovated the brewery and made it functional, but the premises remained vulnerable to inundation during heavy rains.

Client Requirement:

Conduct detailed flood control, mitigation, and associated hydrologic and hydraulic studies to prevent flood damage and mitigate the effects of higher floods.

Project Activities:

  1. Detailed hydrographic and land survey to estimate the extent of soil piping, link the level measurements and flood levels based temporary benchmark to standard datum (MSL), and collect cross-sectional details of the river from Athirappally to Arangali stretch for flood modelling.
  2. Soil investigation to assess the gravity of soil piping/soil erosion that has occurred near the retaining wall/wing wall.
  3. Delineation of the Chalakudy river watershed which drains to the point near the site of brewery using publicly available Digital Elevation Model.
  4. Estimation of reasonable level of peak flow from this watershed by flood frequency analysis based on the collected discharge data.
  5. Estimation of non-exceedance probability of the flood during the design period.
  6. Arriving at the design return period for limiting the probability of exceedance of flood during the design period to 5% or % specified by the client (KALS).
  7. Hydrologic modelling of the watershed to arrive at the flood hydrograph.
  8. Hydraulic Flood simulation of Chalakudy river for the stretch between Athirappali waterfall to Arangali and its validation using historical flood levels at premises based on the flood level measurements at the site.
  9. Based on the simulation, design and estimate the protection works to be carried out to prevent the reasonable flood entering the premises.
  10. Design and estimate of the strategy to arrest the soil loss and for avoiding any further aggravation of the situation.
  11. Design and estimate the intake structure.
  12. Fixing the level of pump house.
  13. Design and estimate the water harvesting facility which can be converted as a water evacuation facility in case of emergent flood arrival.
  14. Design of internal drains within the premises.

Benefits:

Provided the design and estimates for flood protection works to secure the brewery premises, arrest soil erosion, fix pumping station levels, and design internal drainage systems.

Client Name:

AASA Middle East Contracting company India Ltd. — Location: Engandiyur

Client Situation:

A new convention centre and five-star hotel were proposed at Engandiyur. The project site required careful evaluation of surface water flooding risks that could affect construction and long-term stability.

Client Requirement:

Conduct detailed hydrologic and hydraulic studies to assess flooding risk and design internal drainage.

Project Activities:

  1. Collection of topographical data, hydrographic data, DEM using Drone survey, rainfall data, and discharge / 2018 flood inundation data.
  2. Delineation of watershed containing the site and assessment of its accuracy.
  3. Estimation of peak flow and hydrographs from this watershed with the flood frequencies of 50-year, 100-year, 200-year and the major historical flood.
  4. Estimation of non-exceedance probability of the flood during design period for different frequencies.
  5. Checking the adequacy of the cross section of the existing canal and cross drainage works.
  6. Hydraulic design of the cross drainages, if found inadequate.
  7. Hydraulic simulation of flooding in the premises and its surrounding by incorporating proper analysis.
  8. Assessing the risk of floods and fixing the ground level of the parking lot, the convention centre, and the hotel.
  9. Re-alignment and design of internal drains within the premises.
  10. Suggesting measures for reducing the chance of flooding to the neighbouring residential area due to the development/construction.
  11. Checking the adequacy of the evacuation facility for the accumulated water.
  12. Identifying the methods for manoeuvring flooding situations.

Benefits:

Established optimum floor levels for the buildings and designed internal drainage systems to mitigate flood risk.

Client Name:

Mulberry Homes — Location: Kottayam

Client Situation:

The residential layout area planned for development is frequently inundated during heavy rainfall.

Client Requirement:

Determine the optimum filling level for the layout and design a drainage system to prevent inundation without adversely affecting regional flood dynamics.

Project Activities:

  1. Preliminary assessment using synthetic unit hydrograph based on PMP.
  2. Collection of flood data of the Meenachil river.
  3. Collection of the cross-sectional details of the branch of the river to which the plot is to be connected.
  4. Modelling of the channel network in GIS and its hydraulic flood analysis using HEC-RAS (flood analysis tool).
  5. Simulating the various extreme possibilities and working out an optimal level for the proposed yard.
  6. Fixing of the optimum level of layout such that there is no inundation.
  7. Design of drainage system with necessary arrangement.

Benefits:

Identified the optimal layout filling height and designed an efficient drainage network to prevent flooding while maintaining hydraulic equilibrium with the connecting Meenachil river branch.

Client Name:

AASA Middle East Contracting company India Ltd. — Location: Engandiyur

Client Situation:

A new convention centre and five-star hotel were proposed at Engandiyur. The project site required careful evaluation of groundwater and aquifer conditions that could affect construction and long-term stability.

Client Requirement:

Plan groundwater management and design dewatering systems for construction activities.

Project Activities:

  1. Assessment of hydraulic conductivity and storage coefficient from soil report/field measurements.
  2. Groundwater modelling of the premises.
  3. Design of Groundwater pumping system required for lowering the water table during construction activities.
  4. Exploring the possibility of reducing water percolation near the structure and thus reducing pore water pressure on the structure.

Benefits:

Created groundwater models and designed pumping systems to lower the water table during excavation, ensuring construction feasibility and structural stability.

Client Name:

Oceanus — Location: Kasaragod

Client Situation:

During the rainy season, the Oceanus Harmony building experienced excessive groundwater inflows originating around the below-basement biogas plant, causing frequent basement flooding.

Client Requirement:

Determine the cause of dewatering failures and formulate a groundwater management plan to arrest seepage into the basement.

Project Activities:

  1. Assessing the present water table in the basement area by investigating the flow condition through appropriate analysis.
  2. Assessing the surface water/groundwater scenario of the area by analysing the groundwater fluctuation of the area and the digital elevation model.
  3. Identifying and suggesting remedies for the seepage problem.
  4. Suggesting the future use of the biogas plant or its plugging and the precautionary measures to be taken while doing so.
  5. Arriving at the steps/precautionary measures to be taken for the phase two project in the same premises.

Benefits:

Identified seepage paths and groundwater table fluctuations, designed dewatering mitigation measures for the existing building, and provided design guidelines for Phase 2.

Client Name:

NatuEr Developers — Location: Kundanoor, Kochi

Client Situation:

NatuEr Developers is developing "Haritham Gardens," a premium eco-centric residential community in Kundanoor, Kochi. The site sits in a coastal, low-lying, tide-influenced part of Ernakulam district, where a near-surface groundwater table, saline water intrusion, and minimal elevation difference to the outfall panchayath drains pose distinct hydrogeological challenges.

Client Requirement:

The client required a comprehensive hydrological/hydraulic study to actively rejuvenate the site's hydrologic footprint — mitigating coastal salinity, maximizing fresh-water retention, and delivering a climate-resilient stormwater network, plot-level rainwater harvesting design, and a community retention pond, all engineered to function despite the site's very limited fall to the outfall drains.

Project Activities:

  1. Technical site evaluation covering soil, topography, and groundwater conditions.
  2. Hydrogeological and water-quality assessment, including groundwater table variation and a salinity mitigation strategy.
  3. Development of localized IDF curves for the Ernakulam/Kochi region, with design rainfall estimated for 5-year and 10-year return periods.
  4. Catchment delineation and peak design discharge (Qp) estimation using the Rational Method, for present and future scenarios.
  5. Design volume computation for rainwater harvesting based on the derived design rainfall.
  6. Plot-level rainwater harvesting design tailored to each plot's soil characteristics.
  7. Hydrological and hydraulic design of the community retention/detention pond to optimize storage and groundwater recharge.
  8. Design of the internal stormwater drainage network and outfall connections to the front and back panchayath drains, optimized for the site's low elevation gradient to avoid backflow and waterlogging.

Benefits:

The engagement delivers a fully engineered, climate-ready water resource and drainage plan that reduces salinity ingress, improves fresh-water availability and groundwater recharge, and provides a drainage network resilient against waterlogging and backflow — directly supporting Haritham Gardens' vision of a sustainable, ecologically responsible living community.

Client Name:

M/s SP Life Care Private Limited — Location: Thannimoodu, Nedumangad, Thiruvananthapuram

Client Situation:

The client proposed an approximately 11-acre senior living residential development at Thannimoodu, Nedumangad, Thiruvananthapuram. The site is not hydrologically isolated: it combines developable upland with a central wetland/waterbody in a natural valley, receives external catchment drainage entering from outside the plot boundary via upstream sub-watersheds, and is bordered by a drainage channel along its north boundary with a risk of overtopping during high-intensity rainfall — creating potential inundation risk for both the site and its senior-living occupants.

Client Requirement:

The client required a Comprehensive Integrated Water Management Plan — not a site-drainage exercise alone — covering watershed-scale hydrology, flood/inundation modelling, groundwater assessment, wetland management, and stormwater/recharge planning, to allow the development to proceed without compromising the site's natural hydrological regime, while specifically addressing flood-resilience and safe finished-floor levels appropriate to a senior-living occupant profile.

Project Activities:

  1. Site and data assessment: review of contour survey, master plan and geotechnical data; hydrographic survey of the boundary drain; site reconnaissance and GPS/photographic documentation; watershed delineation using toposheets, satellite imagery and DEM with field verification; historical flood data collection.
  2. Watershed and hydrological analysis: catchment characterisation, IDF/design-rainfall derivation for 2, 10, 25, 50 and 100-year return periods, rainfall-runoff modelling (NRCS-CN/Rational Method, HEC-HMS), and quantification of external drain inflows and boundary-drain conveyance capacity.
  3. Flood and inundation modelling: 1D/2D hydraulic modelling (HEC-RAS 2D/SWMM) of the watershed containing the site and boundary drain, with dedicated assessment of overtopping/backwater risk at the north boundary, inundation depth/duration/extent mapping, and evaluation of the wetland as a detention/retention feature to establish safe finished-floor levels and buffer zones.
  4. Groundwater assessment: compilation of borehole/well data, site selection for test drilling, supervision of client-executed test drilling, step-drawdown and constant-rate pumping tests to determine aquifer parameters and safe yield, and groundwater flow assessment calibrated to the test data to establish sustainable yield and borewell feasibility.
  5. Water quality and wetland: baseline water-quality sampling and laboratory analysis of the wetland and inflowing drains, and construction/operational impact assessment with mitigation measures.
  6. Stormwater management, recharge and waterbody planning: detention/retention and recharge structure design, realignment of the existing inlet drain to accommodate the clubhouse and amenities, rainwater-harvesting design recommendations, and a Conservation & Enhancement Plan with Long-Term Management Plan for the waterbody as a recreational amenity.
  7. Integrated strategy: an integrated water management strategy covering harvesting, recharge, reuse and sustainable water-supply planning, culminating in a consolidated report.

Benefits:

The study delivers a watershed-scale Integrated Water Management Plan that quantifies flood and overtopping risk from both the site and its external catchment, defines safe finished-floor levels and buffer zones suited to senior-living occupants, establishes sustainable groundwater yield for the project's own water supply, and converts the site's existing wetland into a managed ecological and recreational asset — enabling the development to proceed without compromising the site's natural hydrology.

Client Name:

Good Earth — Location: Bangalore

Client Situation:

Good Earth has been developing several environmentally sustainable residential villa projects across a 70-acre site in Bangalore, with sewage treatment systems managed under a zero-discharge policy. As part of this development, the client wanted to create a park catering to both residents and the general public, and sought to harvest rainwater from the plot and surrounding catchment to recharge both the shallow and deep aquifers underlying the site.

Client Requirement:

The client required a water harvesting and filtration system design that could capture runoff from the site and nearby area, treat it to a standard suitable for recharge, and direct it to recharge both the shallow and deep aquifers — supporting the development's broader sustainability and zero-disposal philosophy while enhancing the amenity value of the proposed park.

Project Activities:

  1. Development of the local IDF curve for Bangalore to establish design rainfall intensities for selected return periods.
  2. Catchment delineation for the plot and contributing nearby area, and estimation of design discharge (Qp) from the combined catchment.
  3. Design volume computation for the harvesting system based on the design rainfall and catchment response.
  4. Design of the filtration unit to treat harvested runoff prior to recharge.
  5. Design of recharge structures/arrangements for directing filtered water to both the shallow aquifer and the deep aquifer.
  6. Integration of the harvesting and filtration system layout with the proposed park design, serving both resident and public use.

Benefits:

The study delivers a water harvesting and filtration system that captures and treats runoff from the site and its surrounding catchment, enabling dual recharge of the shallow and deep aquifers while supporting a public-facing park amenity — reinforcing Good Earth's zero-disposal, environmentally sustainable development philosophy across its 70-acre villa community.

Client Name:

SciGenome Research Foundation, Cheruturuthy — Location: Shorannur

Client Situation:

The Hortus Malabaricus Garden required a sustainable water supply scheme to support its extensive collections, demanding improvements in water availability, groundwater recharge, pumping, and storage systems.

Client Requirement:

Assess water availability, conduct pumping tests, identify locations for new bore wells and rainwater harvesting structures, and optimize the storage and distribution network.

Project Activities:

  1. Pumping test for open wells and bore wells.
  2. Pumping test analyses and estimation of aquifer parameters for obtaining safe yield.
  3. Pumping system design and water requirement computation.
  4. Topographical analyses and stream flow mapping.
  5. Identification of sites for the location of new bore wells.
  6. Assessing the required capacity of the storage tanks.
  7. Suggesting improvements in the layout and design of the pumping layout.
  8. Suggesting improvement in the layout and design of the distribution system.

Benefits:

Determined safe aquifer yields, mapped stream flows, identified sites for new wells, and designed optimized storage tanks and distribution piping layout for efficient water supply.

Client Name:

Kerala Water Authority — Location: Thiruvananthapuram

Client Situation:

The water authority required verification of the proposed gravity transmission pipelines supplying water from the KT Kunnu tank to Vettuppara and Devinagar.

Client Requirement:

Perform EPANET modeling to verify pipeline sizing, pressure constraints, and assess the storage capacity needed at key distribution nodes.

Project Activities:

  1. Conversion of DGPS Survey details in AutoCAD to EPANET.
  2. Modeling and analysis of the system in EPANET for finding the optimum diameters.
  3. Providing pipeline options: Option 1 (separate lines, independent operation) and Option 2 (combined line up to Vettuppara, slightly more economical).
  4. Identifying the storage requirement at various points and suggesting additional balancing reservoirs.

Benefits:

Verified and optimized pipeline diameters, presented cost-effective combined-line alternatives, and identified necessary storage capacities for additional balancing reservoirs.

CONSULTANT EXPERIENCE

Earlier Project Experience by Consultants

Prior professional and advisory projects led by our principal consultants.

Client Situation:

The Metro Rail Project is one of the prestigious infrastructure projects of the state of Kerala. For the maintenance of the coaches of proposed Metro, a low lying area was identified. It is given that the proposed formation level of the lower terrace was +1.323. This area was inundated to a level of +1.905 on 27.6.2013 and ~2.76 m. It is evident from the present inundation that the formation level should have to be raised. However, raising the level of the lower terrace to the level corresponding to maximum flood recorded at the nearby bridge (4.033+freeboard) will not be economical as the cost involved for rising the proposed ground level by a cm is very large.

Client Requirement:

Hence, an optimum level is to be worked out based on the integrated flood study of the channel network which is connected to the area and also on the existing standards in the railway (50 year flood condition). The work of assessing an optimum value for the lower terrace level by conducting an integrated flood study, considering the channel network system, was entrusted with Dr. N Sajikumar.

  1. To determine an optimal formation level for the proposed metro maintenance yard by conducting an integrated flood assessment of channel network.
  2. To propose a proper arrangement for draining out the water from the proposed yard and its neighbouring area.

Project Activities:

  1. Preliminary assessment using synthetic unit hydrograph based on PMP
  2. Collection of flood data of the river
  3. Collection of the cross sectional details of the branch of the river to which the Maintenance Yard drains to
  4. Modelling of the channel network in GIS and its hydraulic flood analysis using HEC-RAS (flood analysis tool)
  5. Simulating the various extreme possibilities and working out an optimal level for the proposed metro yard.
  6. Fixing of the alignment and sizing of the drainage arrangement for water from the catchment area.

Benefits:

This study was conducted by collecting necessary field data, and by using frequency analysis and modelling of the channel network. From the analyses, it was found that the Minimum terrace level to be maintained is +3.75m (50-Year Flood level +3.00 and 0.75 Free)

Duration: 1 year

Client Situation:

Inhabitants of a local self-government was facing acute water shortage during summer season. They wanted to design a dedicated water supply and assess the availability of potential source for establishing the water supply scheme for the Panchayath. They also wanted to assess the viability of the using the available water in the quarries as a potential source.

Client Requirement:

The client wanted to identify the potential sources for a dedicated water supply for the panchayath, either surface water or groundwater source. They also wanted to assess the viability of the using the water available in the abandoned quarries as a potential source.

Project Activities:

  1. Assessment of the quarry as surface water source by conducting a pumping test
  2. Assessment of water availability in the nearby river by watershed simulation using SWAT model
  3. Assessment surface water quality from the river for drinking purpose and suggestion of treatment method.
  4. Ground water potential assessment and site selection by weighted overlaying of appropriate layers, namely, lineament, Land use, distance to the drainage and the like.

Benefits:

From the analysis, it was found that the water from the abandoned quarry cannot be used as a potential source. The surface water source was also not sufficient to satisfy the demand in the summer season. Groundwater sources along with surface water source must be used for the scheme. The position for extracting the groundwater was also identified.

Duration: 1 year

Client Situation:

The block Panchayath has long term nuisance of water logging problems due to its proximity to sea and drainages. Inadequate drainage caused the inundation of many areas of the block panchayath.

Client Requirement:

The client required comprehensive study of the situation and provides solutions in such manner that these solutions are split into small projects which can be taken up at gramma panchayath level of at ward level.

Project Activities:

  1. Reconnaissance survey
  2. Comprehensive survey covering the canal system and related areas pan the block panchayath
  3. Selection of appropriate level of frequency of event for the design
  4. Estimation of design duration and Peak flow estimation
  5. Sizing of the drain for carrying storm water
  6. Identification of bottlenecks in the system
  7. Identification of the solution
  8. splitting the solution into small projects under different administrative areas with an indication of prerequisite for each project

Benefits:

The solution were divided into solutions that can be taken up by individual gramma panchayath and the projects separately but following the hierarchy of the projects in a systematic way.

Duration: 1 year

Client Situation:

Enormous amounts of water flow out of a dam when it fails catastrophically, or when excess water is released through the spillways and it adversely affects people, infrastructure, and the environment downstream of the dam. The study envisages the preparation of Emergency Action Plan (EAP) to act as interface with the emergency operation plans of district and state agencies to ensure effective and timely implementation of response action.

Client Requirement:

The client required to prepare the flood inundation maps for the different scenarios on the downstream of dams. Based on this, the Emergency action indicating "who does what, where, when and how" is to be proposed for the evacuation of people.

Project Activities:

  1. Data collection. Details of dams/reservoirs, appurtenant works, DEM of the project area, land use and terrain details, roads, bridges, and habituated areas, and details of all those who are responsible for operation of dams and implementation of the EAP at field.
  2. Unsteady flow routing of the outflow from the spillway corresponding to the probable maximum flood and/or that generated due to the failure of dam(s), done by the 2D model of HEC RAS software. HEC GeoRAS was used as interface with the GIS platform. The outputs were generated as: Inundation maps, flood hydrographs, flood peak arrival time maps, for the different cases analyzed.
  3. EAP Preparation: with details showing the responsibilities, emergency detection, evaluation and classification, preparedness, Supply and resources, emergency operation centre, inundation maps, Stake holders meeting.

Benefits:

The document will assist the disaster preparedness of the District disaster management authority.

Duration: 1 year

Client Situation:

For most of the existing old dams, the estimation of probable maximum flood and the spillway capacity were based on empirical procedures. As part of Dam safety and Rehabilitation and improvement project, one of the components was to estimate the Design flood and carry out the routing of design flood, so as to assess the safety of dam.

Client Requirement:

The client required the working out of the design flood corresponding to magnitude of rainfall for the basin in the study and routing of the flood through the spillway of dams. The maximum water level in the reservoir is computed to assess the safety of dams.

Project Activities:

  1. Data Collection: Collection of topographic maps, DEM of the basin draining to the reservoirs, Dam/reservoir details.
  2. Estimation of Design flood: Derivation of unit hydrograph of the basin, Arriving at the magnitude of design rainfall, Derivation of design flood hydrograph.
  3. Flood Routing: Hydrologic Routing of the inflow flood hydrograph at the reservoir corresponding to the design flood, so as to arrive at the resulting MWL.

Benefits:

Hydrology review study gives an idea of the appropriateness of the design flood adopted for the design of outlet works like spillways. Also it can be considered as a reference for assessment of the safety of dams due to changes in rainfall pattern.

Duration: 1 year

Client Situation:

Piping effect in many central spans of the regulator was observed even without storing water upto the desired maximum level. Also, the occurrence of piping effect caused the majority of the blocks of the launching apron on the downstream got displaced from their original position and sunk into the bed, exposing the end of impervious apron.

Client Requirement:

The client required to investigate the root cause and suggest rectification measures to render the structure for the intended purpose to which it was built.

Project Activities:

  1. Data Collection : Field observation and bathymetry data collection at the site.
  2. Design work involves the design of impervious floor, downstream pile, and other protection works.

Benefits:

The design of the rectification works to be carried out for making use of the regulator to cater the intended use of water was reported.

Duration: 1 year

Client Situation:

The client was a contracting firm for the augmentation work of a water supply scheme for Municipal corporation in Kerala. The pumping main was of diameter 1.149m and length of 5.21km. The main was supposed to carry a discharge of 1.252cumec. There were two parallel pumps of rated head 67m and discharge 0.616cumec respectively.

Client Requirement:

The client required the surge analysis of the entire system and assessment of the criticality of the water hammer under pump trip cases.

Project Activities:

  1. Collection of profile of the pumping main
  2. Modelling of water hammer for the pumping system under critical combinations
  3. Identify different options for surge protection devices
  4. Suggestion of economical design of the surge protection device.

Benefits:

The study reveals that the system is predominantly subjected to down-surge rather than upsurge. This indicates the utmost necessity of providing surge protection devices. The suggested solution includes a combination of one-way surge tank, air cushion valves and air valves.

Duration: 2 months

Client Situation:

The state agency for Kerala which has the mandate for the safe supply of water wanted to augment their areal coverage in a region. Though the capacity of the intake structure is more than the required amount, the availability of the water restricts the expansion process.

Client Requirement:

Hence the client defines the scope as to enhance the water availability to satisfy the demand for the expansion project. Several options were sought and finally arrived at the enhancing the water availability by constructing a check dam on the 300m wide river.

Project Activities:

  1. Hydrographic Surveying of the area for taking cross sectional detail
  2. Soil exploration for finding the underlying strata
  3. Site selection for the check dam
  4. Design of check dam and development of software for the design.
  5. DPR preparation for the entire project

Benefits:

The study proposed a check dam across the major river in Kerala so as to enhance the water availability during summer season.

Duration: 1 year

Client Situation:

A local self-government wanted to augment the water availability during the summer seasons. The river dries up during the summer season. Though the bed surface was dried up during summer, interflow through the bed existed. This interflow could be arrested to enhance the water availability and recharge to the neighbouring area

Client Requirement:

A clay bottom below the sand bed ideally suited for a subsurface dyke.This interflow could be arrested to enhance the water availability and recharge to the neighbouring area.

Project Activities:

  1. Hydrographic Surveying of the area for taking cross sectional detail
  2. Soil exploration for finding the underlying strata
  3. Design of impervious layer for the dyke by using the locally available clay,
  4. Design of protection for the impervious layer
  5. Evaluation of the performance of the system

Benefits:

The study proposed a subsurface dyke across the major river in Kerala so as to enhance the water avaiablility during summer season.

Duration: 1 year

PUBLICATIONS

Recent Journal publications

  1. Asha Farsana M., Sajikumar, N. & Subaida, E. A. (2024) "Experimental validation of Engineered Injection and Extraction (EIE) induced with three-dimensional flow field using a laboratory-scale-aquifer model." Journal of Hydroinformatics, (2024) 26 (1): 304–318. Abstract
  2. Sherjah P Yusufali, Sajikumar, N. & Nowshaja P.T. (2023). "Quality monitoring of inland water bodies using Google Earth Engine." Journal of hydroinformatics, vol.25, Issue 2 (March 23) Abstract
  3. Sherjah P Yusufali, Sajikumar, N. & Nowshaja P.T. (2023). "Trophic Mapping of Inland Water Bodies Using Normalized Difference Indices Derived from Sentinel 2 MSI Imagery ". Journal of Hydrologic Engineering, ASCE, 28(1)(January 2023). Abstract
  4. Sherjah P Yusufali, Sajikumar, N. & Nowshaja P.T. (2022). "Semi-analytical model for TSI estimation of inland water bodies from Sentinel 2 Imagery".Journal of hydroinformatics, 24 (2): 444–463. Abstract
  5. Mijicherian, R., Sajikumar, N. &Sumam, K.S. (2022). "Influence of anchors on transientcavit ating flow in pipes".Journal of Mechanical Science and Technology 36 (2) 2022. Abstract
  6. Praseeja, A.V. &Sajikumar, N. (2021). "Numerical simulation on LNAPL migration in vadose zone and its prevention using natural fibre ". Experimental and Computational Multiphase Flow,1-16. Abstract
  7. Asha Farsana, M.,Sajikumar, N. &Subaida, E. A. (2021). "Three-dimensional investigation of Engineered Injection and Extraction for enhanced groundwater remediation". Journal of Hydrologic Engineering,ASCE, 26(8). Abstract
  8. Mijicherian, R., Sajikumar, N. &Sumam, K.S. (2021). "Influence of fluid structure interaction on pressure fluctuations in transient flow".Journal of Pipeline Systems - Engineering and Practice, ASCE, 12(2), 530-535. Abstract
  9. Praseeja, A.V. &Sajikumar, N. (2021). "LNAPL Migration in Vadose Zone and Its Prevention Using Natural Fiber". Journal of Natural Fibers,1-16. Abstract
  10. Blessy, T., Sumam, K. S. & Sajikumar N. (2021) "Patient Specific Modelling of Blood Flow in Coronary Artery". Journal of Applied Fluid Mechanics, Journal of Applied Fluid Mechanics, Sep2021, Vol. 14 Issue 5, p1469-1482. 14p. Abstract
  11. Mijicherian R, Sajikumar N. &sumam K.S. (2020). "Effect of valve closure time on transient cavitating flow through piping systems". ISH journal of Hydraulics, . Abstract
  12. Padikkal, S., Sumam, K.S. &Sajikumar, N (2019) “Environmental Flow Modelling of the Chalakkudi River using Flow Health” Ecohydrology& Hydrobiology,19(1),119-130 Abstract
  13. Praseeja, A. V.&Sajikumar, N. (2019).“A review on the study of immiscible fluid flow in unsaturated porous media: Modelling and Remediation”. Journal of Porous Media, 22(8),889–922. Abstract
  14. Padikkal, S., Sumam, K.S. &Sajikumar, N. (2018).“Decision Making Tool for Sustainable Water Sharing”. Water Resources Management, 32(14), 4707–4723 Abstract
  15. Padikkal, S., Sumam, K.S. &Sajikumar, N. (2018).“Sustainability indicators of water sharing compacts”. Environment, Development and Sustainability, 20(5), 2027-2042. Abstract
  16. Jany G., Letha J. and Jairaj P. g (2019), Prediction of daily reservoir inflow using atmospheric predictors. Sustain. Water Resour. Manag. 5, 1745–1754. Abstract
  17. Deepak, S., Rajan, G. & Jairaj, P.G.(2020) Geospatial approach for assessment of vulnerability to flood in local self governments. Geoenviron Disasters 7, 35. Abstract
  18. Lekshmy Devi, C.A., Jairaj, P.G. & Balan, K. (2021) Laboratory investigations on wave attenuation characteristics of Rhizophora Mucronata poir using physical models with bottom friction. Environ Fluid Mech 21, 361–381. Abstract

Most cited Journal publications

  1. Sajikumar, N. &Thandaveswara B.S. (1999). “A non-linear rainfall-runoff model using artificial neural network”. Journal of Hydrology, 216(1/2), 32-55 Abstract
  2. Sajikumar, N. &Remya, R.S.(2015).“Impact of Land Cover And Land Use Change on Runoff Characteristics”, Journal of Environmental Management, 161, 460-468. Abstract
Organisations We Serve

Our Clients

We continue to deliver engineering excellence and hydrological solutions for leading government bodies, institutions, and private organizations.

AASA Middle East Contracting Company
AASA Middle East Contracting Company
Confident Group
Confident Group
Good Earth Bangalore
Good Earth Bangalore
Indian Railway
Indian Railway
KALS Brewery
KALS Brewery
Kerala Water Authority
Kerala Water Authority
Kifcon
Kifcon
Mulberry Homes
Mulberry Homes
NatuEr Developers LLP
NatuEr Developers LLP
Oceanus Dwelling
Oceanus Dwelling
SciGenom Research Foundation
SciGenom Research Foundation
Sevethday Adventist
Sevethday Adventist
SP Life Care
SP Life Care
SudCheme
SudCheme