Annual Validation of General & Regional Models 

Location

Entire Bangladesh

Type of Project

Surface water Simulation Modelling

Period of Study

1997-2000

Client

Water Resource Planning Organisation (WARPO)

Description

The General Model and the six region models, namely the South West Region Model (SWRM), South East Region Model (SERM), North East Region Model (NERM), North West Region Model (NWRM), North Central Region Model (NCRM), and Eastern Hilly Region Model(EHRM) were developed under various phases of the Surface Water Simulation Modelling Project of the Government of Bangladesh. These models are housed at SWMC and require annual update to represent the latest hydro morphologic situation. Once updated the models represent hydraulic condition in the major and regional rivers and serve as the only computational framework for generating information and data required by the planners and decision makers in the management of water resources. Since 1993 the models have been applied in water related projects extensively that include FAP studies and a large number of BWDB FCDI projects and infrastructural development projects. Application of the SWMC models in water related projects is a continuing process. Thus the models have been regularly validated with annual hydrological and recent topographic data since 1994-95 and kept ready for application.

• Under a three years contract with WARPO, updating of the General an six regional models have been going on since 1997. The update models are used by the WARPO in the formulation of National Water Management Plans, various BWDB projects of water management including flood forecasting and infrastructure development by RHD. The models support consistent hydrological analysis to develop design conditions using historical runs (25 years). During update new features are included. Following are the changes in the current update.
• The Teesta barrage has been included in the North West Region Model
• Recently surveyed cross-sections of the Jamuna river has been included in the General Model to represent the Bangladesh Multipurpose Bridge with satisfactory simulation
• The Jamuna river has been included in the North Central Region Model to resolve the uncertainty of the upstream boundary conditions of the spill channels on its left bank
• Besides about 215 cross-sections collected from SWMC clientele survey projects have been included in the models to update the topographic description of river systems