RAINFALL RUNOFF MODELLING USING HEC-HMS

PROJECT REVIEW

TOPIC: RAINFALL RUNOFF MODELLING

USING HEC-HMS SOFTWARE

Group members:

Sukrit Malhotra (11BCL1071)

Pushp Aggarwal (11BCL1053)

Project Coordinator:

Dr. Bindhu V.M

IntroductionHydrological Model is a simplified representation of natural system.

Model is necessary for efficient planning and management. It provides

information that can help us to

Be proactive and control a situation at the time of floods

Estimate the increase in the volume.

Regulate floodplain activities

Operate or evaluate existing hydraulic-structures

Studying and simulating rainfall runoff process.

Learning the basic concepts of modelling software

Preparation of draft model

Using different hydrologic elements available

Computing and modelling run off

Objective

Work Procedure

HEC-HMS Model

Cultivated land

CN-71

Residential area,

impervious 20

CN-68

Good condition

grass cover

CN - 61

Model Layout

Sub-basin

Junction

Metrological models

Precipitation data

Control Specification

Basin

Compute simulation run

Results

Method to Compute lossesTo compute the losses(i.e. infiltration, evaporation or other volume losses) we have used “The SCS curve number (CN) loss model”

CN=??

Effect of lag time in hydrographEffect of curve number and impervious percentage

THANK YOU