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題名 | 清水溪懸移質輸砂量推估模式建置研究=Model for Establishing Suspended Load Estimation in the Chingshui Watershed |
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作者姓名(中文) | 張力文; 蔡淑芬; 林昭遠; | 書刊名 | 水土保持學報 |
卷期 | 48:1 2016.03[民105.03] |
頁次 | 頁1607-1625 |
分類號 | 436.124 |
關鍵詞 | 網格式合理化法; 降雨-逕流模式; 懸移質輸砂量; GRAPH; Rainfall-runoff model; Suspended load; |
語文 | 中文(Chinese) |
中文摘要 | 清水溪集水區自921大地震後,震鬆原本脆弱地質,每逢颱風暴雨,洪水挾帶大量泥砂,易危及下游地區之保全對象。本研究利用網格式合理化法(Grid Rational Algorithm for Predicting Hydrograph, GRAPH) 模擬清水溪集水區逕流歷線,並配合懸移質實測紀錄,以逐時之流量推估暴雨期間河川懸移質輸砂量。結果顯示在高流量(重現期距大於5年)下,實測與推估之懸移質輸砂量有較高的符合度(誤差約10%);中流量(重現期距3~4年)之模擬結果較差(誤差30%~50%),顯示本模式適合於高流量下懸移質輸砂量之推估,流量愈大所推估之誤差愈小。研究成果可供颱洪期間防災預警及保育治理對策研擬之參考。 |
英文摘要 | Geologic condition in Chingshui watershed has become more fragile after Chi-Chi earthquake. Lots of sediments transported by the torrential floods during the following typhoon seasons cause huge hazards which threaten the protected targets located at the downstream areas. However, the suspend load has its uncertainties and difficult to measure during typhoon event. Alternatively, the indirect estimation of suspend load, which applicable provide early response and handling of disaster prevention, should be proposed. This study, a hydrologic model (Grid Rational Algorithm for Predicting Hydrograph, GRAPH) was used to simulate the runoff hydrograph in Chingshui watershed. Moreover, the suspended load during the typhoon and/or heavy rainfall event would be estimated from hourly discharge and compared with measure data. The results show that the events with high peak flow (return period greater than 5 years) perform better consistency in suspended load estimation (about 10% errors); while the events with medium peak flow (return period: 3-4 years) showing errors within the range of 30% to 50%. This study reveals that the model was suitable to estimate suspended load under high peak flow. The higher peak flow it was, the more accurate it has. The results could be as a reference of disaster prevention, pre warning, and strategy making. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。