| Summary: | 碩士 === 國立臺南大學 === 自然科學教育學系碩士班 === 92 === Based on the concepts of sediment transport within a given basin,
The volume of the Da-An River, which is located at the muddle part of
Taiwan, is studied by using the data of real-field sediment transport
records from Hydrological Year Book of Taiwan of Water Resources Bureau Ministry of Economic Affairs to establish the relationship
between sediment content then the annual sediment transport weight is estimated by the daily mean discharge. By comparing the theoretical
sediment transport with the ones which are got from the hydrological
records before and after Chi-chi 921 great earthquake, the mechanism
and factors of earthquake on the effects of river sediment transport are
discussed, meanwhile the magnitude of increment about sediment product on Da-An River is insignificant. Substituting annual mean discharge after Chi-chi 921 great earthquake, the scale of the increment on the sediment product within the Da-An River basin is only about
10﹪.
The ratio of sub-basin area with power index in 2/3 is used to find the relative discharge In order to obtain the virtual sediment transport for whole river catchment.
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