An Integrated Distributed-Hydrologic and Watershed-Management Model: A Case Study in the Heshui River Watershed of Southern China

Xiaosheng Qin

School of Civil and Environmental Engineering, Nanyang Technological University, Singapore

Guo H. Huang

Faculty of Engineering, University of Regina, Regina, Canada

Li He

Department of Civil Engineering, Ryerson University, Toronto, Ontario, Canada

Hydrologic models have extensive uses in watershed management, water resources management, agricultural irrigation planning, floodplain management, etc. Normally from the perspective of hydrologic cycle, water availability is significantly affected by a series of hydrologic processes such as precipitation, evaportranspiration, runoff generation, and runoff routing. A question of concern prior to forecasting is that how much streamflow will be generated given an amount of precipitation. To answer this question, a number of hydrologic models have been developed for a variety of uses such as water resources management, agricultural irrigation planning, flooding prediction, dam rehabilitation, floodplain management, water-quality evaluation, and water-supply forecasting (Wurbs, 1998).In this study, a structure-distributed hydrologic model named University of Regina Hydrologic Model (URHM) was developed to simulate rainfall-runoff relationships. The model can be used for (1) identifying critical areas with rich and poor water availability within the watershed, (2) providing technical alternatives for water allocation within the watershed, (3) investigating practical water resources management alternatives, and (4) offering a scientific basis for developing related watershed management policies.

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