首页|SIMULATIONS OF SEDIMENT YIELD AND PHOSPHORUS YIELD FROM A WATERSHED IN TAIWAN, CHINA
SIMULATIONS OF SEDIMENT YIELD AND PHOSPHORUS YIELD FROM A WATERSHED IN TAIWAN, CHINA
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NETL
NSTL
万方数据
维普
Long term sediment yield and phosphorus yield from a watershed are important information for watershed management planning. Since sediment and water quality data for the streams draining a watershed are most often observed only periodically, a method is needed to extend the knowledge gained from the observed data to the rest of the observation period. In this study, it is proposed that suspended sediment load be established as a power function of stream discharge, and total phosphorus load as a power function of suspended sediment load. The propositions are applied to a watershed in Taiwan. Using suspended sediment load and total phosphorus load data, parameters for the functions are calibrated. The functions are used to simulate daily suspended sediment load and daily total phosphorus load based on observed daily stream discharges for the gauging station near the watershed outlet. Annual sediment yield and total phosphorus yield are then calculated from the simulated daily load. It is shown in this study that the intercepts of the power functions are related to watershed land use activities and can be calibrated using those data. The relations may be used to develop watershed management strategies for controlling sediment and phosphorus exports.
Sediment yieldTotal phosphorus yieldWatershedLand use
Cheng-Daw HSIEH、Wan-Fa YANG、Wen C.WANG
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Institute of Environmental Engineering,National Taiwan University,Taiwan,China
NETL
NSTL
万方数据
维普
