RIVER BASIN PLANNING

MODELS

MODELING THE NATURAL RESOURCES SYSTEM AND RELATED

INFRASTRUCTURE

>> Muhammad bin Ramlan

CONTENT

Introduction

Modelling of Water Resources System

Challenges in Water Resources Systems Modelling

Developments in Modelling

LAKES AND RESERVOIR The primary use of all reservoir is to provide a means of regulating downstream surface water flows over time and space.

Other purposes may include storage volume management for recreation and flood control, and storage and release management for hydropower production.

LAKES AND RESERVOIR Reservoir storage capacity can be

divided among three major uses:

Active storageUsed for downstream flow regulation and

for water supply, recreational development or hydropower production

Dead storage Required for sediment collection

Flood storageCapacity reserved to reduce potential

downstream flood damage during flood events

WETLANDS AND SWAMPS

A brief example to demonstrate the value of modeling.

General thoughts on the major challenges facing water resources system planners and managers, the information they need to meet these challenges , and the role analyst have in helping to provide this information.

Information on the practice of modeling is in a state of transition, and how current research and development in modeling and computing technology are affecting the transition.

WATER QUALITY AND ECOLOGY

•River basin models focusing on water quantities are mostly used to investigate whether sufficient water is available to satisfy the various use functions and to identify measures to match supply and demand.

•The core of most river basin models consists of keeping track of the water balance of the whole river basin.

•The analysis of water quality and ecology is done using another model of for a specific part of the system e.g. river stretch, reservoir or ground water system. This model will be described in Chapter 12.

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