Water Resources & Irrigation

Stormwater & Flood Management

Science-based stormwater master planning, 1D/2D hydraulic flood modelling, and resilient drainage infrastructure design for cities and towns across Ahmedabad, Gujarat, and India.

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Stormwater drain design and flood management by HRP Infra Gujarat
Urban Water Resilience

Engineering Flood-Resilient Cities
Across Gujarat & India

Rapid urbanisation and changing monsoon patterns have made urban flooding a critical infrastructure challenge in Ahmedabad, Surat, Vadodara, and cities across India. HRP Infra Pvt. Ltd. brings advanced hydrological and hydraulic modelling expertise to deliver data-driven stormwater and flood management solutions that protect communities and assets.

Our team combines field survey experience, GIS-based catchment analysis, and internationally recognised modelling tools to design drainage networks, flood retention basins, channel improvements, and cross-drainage structures that perform under extreme monsoon events.

40+
Drainage Projects
500+
km of Drains Designed
12
Urban Bodies Served

Urban Drainage Challenges We Solve

Waterlogging in Urban Areas

Inadequate drainage capacity causing road and basement flooding during peak monsoon hours.

Riverine Overbank Flooding

Encroachment on floodplains and undersized bridges causing inundation of residential zones.

Cross-Drainage Failures

Culverts and causeways on rural roads washed away or blocked during high-intensity rainfall events.

Natural Drainage Obstruction

Nala encroachment and solid waste blockages reducing effective drainage capacity by 30–50%.

Service Scope

Our Stormwater & Flood Management Services

HRP Infra offers a complete suite of stormwater and flood management consultancy services, from catchment surveys to final construction drawings.

Stormwater Master Planning

GIS-based delineation of drainage catchments, network inventory assessment, capacity analysis, and master plan recommendations for municipal corporations and ULBs.

Hydrological & Hydraulic Modelling

Catchment runoff estimation using rational method, SCS-CN, and unit hydrograph methods; 1D/2D flood simulation using HEC-RAS and SWMM for inundation mapping.

Drainage Infrastructure Design

Detailed design of stormwater drains, RCC box drains, open channels, interceptor drains, retention ponds, and outfall structures with hydraulic and structural calculations.

Cross-Drainage Structures

Hydraulic and structural design of culverts, causeways, vented causeways, and minor bridges at natural watercourse crossings on rural and urban roads.

Nature-Based Solutions

Design of rain gardens, bioswales, permeable pavements, and constructed wetlands to reduce runoff volumes and improve water quality at source.

Flood Risk Assessment & DPR

Flood risk and vulnerability assessments, floodplain mapping, and DPR preparation for flood mitigation works eligible for state disaster management and NDRF funding.

Our Approach

Data-Driven, Science-Based Flood Engineering

  • Remote Sensing & GIS: Satellite-derived DEM, LULC analysis, and GIS-based network tracing for accurate catchment characterisation.
  • Advanced Modelling: HEC-RAS 2D and SWMM models calibrated with observed flood data for reliable design storm analysis.
  • Climate Change Consideration: Integration of projected rainfall intensity changes into drainage design to ensure infrastructure remains adequate over a 30–50 year lifespan.
  • Multi-Sector Coordination: Liaison with municipal engineering, GWSSB, GWRDC, and road departments for coordinated infrastructure planning.
  • Construction-Ready Outputs: Detailed drawings, longitudinal sections, BOQ, and specifications produced to a standard ready for direct tendering.
Hydraulic flood modelling and GIS mapping by HRP Infra Ahmedabad
How We Work

Our Project Workflow

1

Survey & Data Collection

Topographic survey, hydrometeorological data analysis, and existing drainage inventory.

2

Hydrological Analysis

Catchment delineation, design storm derivation, and runoff computation.

3

Hydraulic Modelling & Design

Flood simulation, network sizing, and detailed infrastructure design.

4

DPR, Drawings & Tendering

Construction drawings, BOQ, cost estimates, and bid document preparation.

Standards, Guidelines & Modelling Tools

HEC-RAS 1D/2D
SWMM / PCSWMM
HEC-HMS
ArcGIS / QGIS
IRC SP:42 (Urban Drainage)
CWC Hydrology Guidelines
MoUD URDPFI Guidelines
Common Questions

Frequently Asked Questions

What is urban stormwater master planning and does HRP Infra provide it?
Urban stormwater master planning involves a city-wide assessment of catchment areas, drainage networks, and flood-prone zones to design a comprehensive drainage strategy. HRP Infra prepares GIS-based stormwater master plans for municipalities and urban development authorities in Gujarat and across India.
Which flood modelling software does HRP Infra use?
HRP Infra uses HEC-RAS for 1D/2D hydraulic flood modelling, SWMM for urban stormwater simulation, and HEC-HMS for hydrological analysis, enabling accurate flood inundation mapping and design validation for both riverine and urban pluvial flooding scenarios.
Can HRP Infra help with drainage design for new township or industrial area development?
Yes. HRP Infra provides drainage layout design for GIDC industrial estates, township developments, SEZs, and smart city projects in Gujarat, ensuring adequate capacity for design storm events and compliance with applicable local body standards.
What is the difference between stormwater drainage and flood management?
Stormwater drainage focuses on collecting and conveying runoff from paved surfaces through pipe networks and open channels. Flood management is broader, encompassing riverine flood analysis, floodplain mapping, retention basin design, and community-level disaster risk reduction interventions.
Does HRP Infra design cross-drainage structures like culverts and causeways?
Yes. HRP Infra designs box culverts, pipe culverts, causeways, vented causeways, and road over/under bridges at natural drainage crossings, with hydraulic design based on design flood return periods specified by IRC, CWC, and state government norms.

Protect Your City from Flooding — Talk to Our Experts

HRP Infra's stormwater and flood management team in Ahmedabad delivers proven engineering solutions for urban and rural drainage challenges across Gujarat and India.

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Other water resource and irrigation engineering services by HRP Infra

Water Supply & Drainage

Pipeline networks, hydraulic design, and construction supervision

Treatment Plants

WTP, STP, and ETP design and DPR preparation

Dams & Irrigation Schemes

Flow and lift irrigation project engineering