In order to describe the real flood characteristics more effectively, a modified Muskingum flood routing model is proposed. This new model is developed based on mass conservation law so that the effects of the upstream tributaries and the distance from each gauging station of tributary to the downstream control point in a basin can be included. A genetic algorithm is also employed to obtain the parameters in the process. Based on eight flood events on Pa-Chung River Basin, it is shown that the effective coefficient can be as high as 0.98 while the volumetric error is lower than 4%, error on the flood peak discharge is within 7%, and error on the estimated arrival time of the peak discharge is within two hours. All proved the applicability of this model.
有較準確的結果。 另在馬斯金更法研究上,O’Donnell [12] 提出考慮側流量之馬斯金更模式,並指出參數 K、X 為一隨河川物理之特性值,而側流量與入流量之比值隨降雨 分佈特性而異。O’Donnell 等 [13] 建立上、下游洪峰流量稽延時間之修正型馬斯金更模式,使模式在參數的推估及預測上較符合實況。徐 [14] 利用石門集水區的暴雨資
影響鄰近河川的人民,並造成生命與財產的威脅。尤其隨著各流域範圍內土地之逐年開發利用,常造成洪峰流量之增加,對河道沿岸居民之威脅更加嚴重。本研究認為,若能有效模擬集水區之水文 2 或美國水土保持局(SCS)曲線值法決定,各子集水區的串連採用馬斯金更法進行河川演算。研究中依上述設定之資料輸入 HEC-1 水文分析模式後,可完成洪峰流量及流
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