- 期刊
The Modified Muskingum Flood Routing Model Considering Tributaries and Lateral Flow
考慮支流與側流之修正馬斯金更洪水演算模式
摘要
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.
並列摘要
基於質量守恆觀點，在實際進行流域洪水演算時，針對河川上游各支流河性之不同及各支流測站與下游控制點測站之距離各有差異之考量下，建立能同時考慮多條支流及河道非點源側流量之修正馬斯金更洪水演算模式；文中並以遺傳演算法進行模式參數推估。在八掌溪8場颱洪事件之實際模擬裡，無論檢定與驗證之評鑑結果，其效率係數可達0.98，體積誤差低於4%，洪峰量誤差低於7%，洪峰到達時刻誤差在2小時以內，此說明該模式之實用性與適用性良好。