Modelling Support to FAP-20 CPP

Location

District of Tangail, Bangladesh

Type of Project

Integrated flood management by compartmentalization

Period of Study

1995-1996,July to December, 1999

Client

Bangladesh Water Development Board (BWDB)

Regulator in Lohajang River

Project location

Breach in project

Model output before

Description

The project aims to maximize the benefits from agriculture and fisheries sectors through a comprehensive integrated water management, implementing the concept of Compartmentalization incorporating a people’s participation approach. The project had two different phases. In the first phase, planning and implementation were done and in the second phase, concentration was given on water management and institutional development.

About 53 nos. of water control structures were constructed for the internal water management within the compartments. Those nos. of structure made the system complicated and modelling support was felt necessary for assisting water management. SWMC was offered to provide modelling support.

A Flood Management Model was developed, calibrated and validated with recent years’ data. Then the model was applied to solve complex problems related to water management. Mainly the following supports were provided.

Evaluation of the existing drainage system.

A nos. of scenarios were simulated to establish the operation rules for the water control structures.

This model was used for environmental impact assessment, flood damage assessment and catch assessment for fisheries sector.

During flood 1998, few breaches were formed in the project embankments. The model was then used to forecast the extent of flooding due to those breaches for the next coming three days and to assist the decision makers for selecting the operation criteria for the breaches.