Annual Maintenance of CAD Project

Location

South Eastern Region of Bangladesh

 

Type of Project

Decision Support System

 

Period of Study

2000-2001

 

Client

Bangladesh Water Development Board (BWDB)

Map Showing Irrigation Index & Soil moisture deficiency for U2 System on 15 th February 2001

Water logging in the project area beforeimplementation of the project

SWMC has developed a DSS to provide optimal utilisation of irrigation water

Description

Decision Support System (DSS) for Irrigation Management is an advanced tool based on Geographical Information System (GIS) software and numerical modelling techniques. The models are basically an integration of a surface water simulation model (MIKE 11) and a groundwater model (MIKE SHE). DSS supports the manager of irrigation projects to ensure improved water management. Performance of an irrigation project rarely attains its design potential. A few of the possible reasons include insufficient water at the source, inadequate conveyance of the irrigation system, deterioration of the irrigation system, incorrect operation of structures, excess withdrawal at head end or simply social conflicts. In order to maintain an efficient operation & management practice, tool like DSS is essential. The pilot DSS delivered to Bangladesh Water Development Board (BWDB) by SWMC has been developed for U2 system in the Meghna Dhonagoda Irrigation Project (MDIP) to test its applicability in irrigation system management. The pilot DSS delivered by SWMC will help in irrigation management but it will need updating with latest filed information and field validation. This project aims at updating the DSS for the irrigation season of 2000 and validating the DSS for the irrigation season of 2001 in order to assess its usefulness. DSS is suitable for assessing irrigation scheme performance, which is based on simulated soil moisture content distributed in time and space. Reasons for not achieving the full potential of the irrigation system can be identified and remedial measures can be taken accordingly. The input to and the output from the model through DSS are :

 

Input to the Model              

  • Land-use                                   

  • Crop Calendar                            

  • Rainfall data                               

  • Pump Operation                         

  •  Structure Control                       

  Output from DSS

  • Total Irrigation

  • Channel Water Level & Flow

  • Total Demand

  • Soil Moisture Deficiency

  •  Irrigation Index