EHMH GROUP / HYDROLOGY

Hydrological Studies for Infrastructure Projects.

Watershed characterization, rainfall and runoff analysis, design flow estimation, and scenario assessment to support sound engineering and investment decisions.

01 Design Flow Estimation
02 Rainfall–Runoff Modeling
03 Scenario Assessment
01 / WHEN IS IT NEEDED?

Hydrological uncertainty can become an engineering challenge.

Projects need reliable information about local hydrological conditions before designing infrastructure, assessing drainage performance, or evaluating flood-related risks. The scope of each study depends on the problem being addressed and the information available.

01 / DESIGN

Design flows are unknown

Runoff contributions and reference design events must be estimated to size or verify hydraulic infrastructure.

02 / DEVELOPMENT

Land use is changing

New impervious surfaces, earthworks, and urban development can alter runoff generation, drainage patterns, and discharge conditions.

03 / FLOOD EVENTS

Flooding has occurred before

The watershed response needs to be understood under events of different magnitudes and hydrological conditions.

04 / PROJECT PLANNING

Technical justification is required

Engineering and environmental assessments may require hydrological parameters, scenario analysis, and technically supported documentation.

02 / TECHNICAL SCOPE

From watershed analysis to engineering design parameters.

We select analytical methods based on catchment characteristics, rainfall regime, data availability, and project objectives. Our approach emphasizes appropriate assumptions, transparent methodologies, and traceable results.

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01

Watershed Characterization

Catchment delineation, terrain analysis, slopes, drainage networks, land cover, and relevant morphometric parameters.

02

Rainfall Analysis

Assessment of precipitation records, design storms, intensity–duration–frequency relationships, and rainfall temporal distributions where applicable.

03

Hydrological Modeling

Application of rainfall–runoff methods, precipitation losses, runoff transformation, and flow routing techniques, according to study objectives and available data.

04

Scenario and Sensitivity Analysis

Comparison of design events, land-use conditions, intervention alternatives, and model parameters to understand watershed response.

03 / DATA AND ANALYSIS

A model is only as reliable as the assumptions behind it.

The quality of a hydrological study depends on its source data, the representation of the terrain, and the selection of suitable analytical methods. We prioritize traceable results, clearly stated assumptions, and conclusions consistent with the information available.

Review and validation of input data
Justified model parameter selection
Evaluation of results and limitations
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04 / APPLICATIONS

Hydrological studies for land development and infrastructure.

01 / URBAN

Urban Developments

Catchment areas, land-use changes, stormwater runoff, and discharge conditions for residential and urban projects.

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02 / INFRASTRUCTURE

Roads and Civil Works

Design flow estimation for culverts, water crossings, drainage channels, and stormwater infrastructure.

03 / INDUSTRY

Industry and Energy

Assessment of runoff, catchment contributions, and hydrological scenarios associated with industrial and energy projects.

04 / LAND

Rural Watersheds

Natural drainage analysis, surface runoff assessment, and hydrological conditions relevant to agricultural and rural infrastructure projects.

05 / DELIVERABLES

Technical information to support informed decisions.

Deliverables are defined according to the purpose and scope of each study. They may include design parameters, modeling results, technical drawings, and engineering recommendations.

01
Technical report and methodology
02
Watershed delineation and characterization
03
Design flows and hydrographs, where applicable
04
Model assumptions, parameters, and results
05
Conclusions, limitations, and recommendations
07 / FREQUENTLY ASKED QUESTIONS

Before Starting a Hydrological Study.

What information is needed to prepare a quotation?

The project location, approximate study area, purpose of the assessment, and available background information are a useful starting point. We can then identify missing information and define the appropriate technical scope.

Is a hydrological study sufficient for my project?

It depends on the objective. A hydrological study estimates watershed response and associated flow rates. If water levels, velocities, or the hydraulic capacity of infrastructure must also be evaluated, a complementary hydraulic study may be required.

Can a study be carried out with incomplete data?

In some cases, yes. The available information must be reviewed, assumptions justified, and limitations clearly documented. The suitability of the results depends on whether the remaining uncertainty is acceptable for the intended decision.

08 / CONTACT

Need a Hydrological Study?

Tell us about your project, its location, objectives, and available background data. We will review the information and help define the technical scope for a proposal.

Request an Assessment