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Disaster Risk Management / Service

Flood Risk Mapping & Management Services

Geospatial evidence for flood susceptibility, exposure screening and risk-informed planning—combining terrain, rainfall, drainage and land-use data with the right analytical method.

Flood susceptibility screeningExposure and vulnerability contextTerrain and satellite analyticsDecision-support mapping
Service overview

Understand where flood impacts may concentrate

Flood hazards vary with rainfall intensity, drainage capacity, river conditions, terrain, land cover and built development. Flood risk also depends on the people, assets and infrastructure exposed, and how vulnerable they are.

VTS combines available terrain, hydro-meteorological and spatial exposure information to produce defensible screening maps and planning insights. Hydrodynamic inundation modelling, design-flood estimates or real-time forecasting require additional model inputs and scope.

Technical limitation: A GIS flood susceptibility map does not by itself show water depth, timing or probability of inundation for a specified return period. Engineering-grade flood hazard and emergency decisions require suitable hydrological and hydraulic modelling, calibration and authoritative data.
Drainage network illustration relevant to flood catchment assessment
Drainage-network context only; this is not an inundation or flood-risk map.
Our methodology

How the analysis is developed

The workflow is adapted to the location, scale, source-data quality and the decisions the project must support.

01 — Define

Define flood question

Agree whether the objective is susceptibility screening, exposure mapping or calibrated inundation modelling.

02 — Compile

Compile datasets

Gather DEM, historical flood extent, rainfall, hydrology, drainage, land use and exposed assets.

03 — Analyse

Analyse flood drivers

Evaluate terrain position, slope, water pathways, proximity to drainage and other relevant predictors.

04 — Build

Build assessment

Use appropriate GIS overlay, statistical models or hydraulic modelling where data and scope allow.

05 — Review

Review uncertainty

Compare with historical events and observations, and document temporal and spatial limitations.

06 — Support

Support decisions

Produce priority maps, exposure summaries, technical notes and planning recommendations.

Typical inputs

Typical data and thematic inputs

Data layers are selected for scientific relevance and reliability; requirements vary by study.

DEM and floodplain terrainRainfall recordsRiver and drainage networkHistorical flood extentsSatellite flood imageryLand use / land coverSoil and permeabilityInfrastructure and settlementsWater levels / discharge dataExposure and vulnerability data
Project deliverables

What your organisation receives

Final scope and deliverable formats are agreed at the proposal stage.

Flood susceptibility or hazard map as scoped
GIS-based exposure and asset screening
Contributing flood-factor maps
Priority location and area statistics
Historical inundation comparison where data permit
GIS-ready layers and print-ready maps
Methods, assumptions and uncertainty report
Planning recommendations and further-study needs
Applications

Where flood risk management services supports decisions

Urban flood planning

Identify locations that warrant drainage investigation and mitigation planning.

Watershed and river-basin studies

Review flood-related terrain and catchment characteristics.

Infrastructure screening

Consider flood-prone corridors and facilities in early-stage appraisal.

Community risk reduction

Support broad-scale prioritisation where exposure and vulnerability data exist.

Emergency preparedness support

Map potential hotspots and relevant assets; not a substitute for official warnings.

Environmental and planning studies

Provide spatial context for land use, floodplains and development decisions.

Frequently asked questions

Flood Risk Management Services FAQs

What is the difference between flood hazard and flood risk?

Flood hazard refers to the physical flood process, such as inundation extent or depth. Risk additionally considers exposure, vulnerability and potential consequences.

Can GIS alone predict flood depth?

No. Depth estimates for specified events generally require appropriate hydrological and hydraulic modelling and suitable input and validation data.

Do you use satellite imagery to map past floods?

Where appropriate, optical and radar imagery can support historical inundation delineation, subject to image availability and interpretation limits.

Can this support flood management plans?

Yes, as decision-support information for screening and prioritisation; implementation-grade recommendations may require engineering investigation.

What is needed for a quotation?

Share the area of interest, desired outputs, historical flood records if available, exposure assets, scale and intended decisions.

Get Started

Discuss Your Project Requirement

Share your study location, area, available data and objectives. Vasu Terra Solutions will help define an appropriate assessment scope and deliverables.