English  |  正體中文  |  简体中文  |  Items with full text/Total items : 43312/67235
Visitors : 2116541      Online Users : 3
RC Version 5.0 © Powered By DSPACE, MIT. Enhanced by NTU/NCHU Library IR team.

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/95740

標題: AnnAGNPS模式推估集水區逕流量與泥砂產量之適用性探討
A study of feasibility for using AnnAGNPS model to simulate runoff and sediment yield in a watershed
作者: 許桓碩
Hsu, Huan-Shuo
Contributors: 吳輝龍;連惠邦;林文賜;林俐玲
林昭遠
中興大學
關鍵字: Shih-man Reservoir;AnnAGNPS;Runoff;Sediment yield yield
石門水庫;農業非點源污染模式;地表逕流;泥砂產量
日期: 2008
Issue Date: 2012-08-31 15:01:21 (UTC+8)
Publisher: 水土保持學系所
摘要: 為有效協助規劃集水區,國內外發展了許多集水區歷程演算模式,此類模式的發展有助於評估集水區內各種開發行為對環境所帶來之衝擊及影響。本研究主要探討以年農業非點源污染模式(AnnAGNPS)模擬石門水庫上游白石溪集水區內逕流量及泥砂產量之適用性。模式敏感度分析結果,對逕流量之敏感度由高至低依序為逕流曲線數值(CN值)、田間容水量及飽和傳導度;而對泥砂產量之敏感度由高至低依序為植物覆蓋率、田間容水量、曼寧n值及根系單位面積鮮重。以1997年間實測流量與泥砂量對模式內各參數進行校準,再以1998~2000年間實測資料對模式之推估值進行驗證,並以效率係數(CE)、性能係數(CP)及估計差異(ED)評估模式之適用性。驗證期間各年逕流量推估結果依時間排序其CE分別為0.65、-0.38及0.24,合併1998~2000三年推估結果後得CE為0.45;依時間排序其CP分別為0.35、1.38及0.76,合併1998~2000三年推估結果後得CP為0.52;ED依時間排序分別為-14.13%、39.08%及18.89%,1998~2000年為11.99%;泥砂產量推估結果:依時間排列CE值為0.94、0.30及0.87,1998~2000年為0.92;依時間排列CP值為0.06、0.70及0.13,1998~2000年為0.08;ED值分別為13.85%、36.09%、21.51%以及1998~2000年的19.24%。以單月產量進行評估時,CE值介於0.24~0.92之間,ED值均在40%以內。CE值與ED值顯示出模式並未深入考慮時間尺度,而是以推估集水區內逕流與泥砂之總產量為重點。綜合驗證期間模式之誤差原因,歸類為下列三種:1.退水延時誤差 2.降雨類型誤差 3.基流誤差。
Various kinds of calculating watershed models were developed to provide the help for designing the watershed. The functions of models could help the researcher to estimate the environmental influence and impact. The study mainly probes into the application of AnnAGNPS through simulating the runoff and sediment yield at the upper watershed of Pai-shih River in Shih-man Reservoir.By using the sensitivity analyze of AnnAGNPS for runoff and sediment yield, the numbers from high to low showed two outcomes. The first about runoff is CN value, field capacity, and hydraulic conductivity of saturated soil; the other about sediment yield is cover ratio, field capacity, Manning''s n and live root mass. Three steps were used to evaluate AnnAGNPS. First, using the data in 1997 related to the runoff and sediment yield corrected the parameter. Second, using the data from 1998 to 2000 tested and verified the estimation. Final, using CE, CP, and ED estimated the application. Moreover, the results after testing the runoff were showed by the ordering of time from 1998 to 2000, and combined. Separately, CE is 0.65, -0.38, 0.38, and 0.45. CP is 0.35, 1.38, 0.76, and 0.52. ED is -14.13%, 39.08%, 18.89%, and 11.99%. However, the following results referred to the sediment yield. CE is 0.94, 0.30, 0.87, and 0.92. CP is 0.06, 0.70, 0.13, and 0.08. ED is 13.85%, 36.09%, 21.51%, and 19.24%. Besides, CE is between 0.24 and 0.92, as well as ED is within 40% when the researcher used monthly data to evaluate.From CE and ED, the researcher found AnnAGNPS did not take time into consideration, but focused on estimating the sum of the runoff and sediment yield in the watershed. Furthermore, by integrating the deviations as evaluating AnnAGNPS, three types of deviation are categorized: recession curve duration, rainfall type, and base flow.
Appears in Collections:[依資料類型分類] 碩博士論文

Files in This Item:

There are no files associated with this item.



 


學術資源

著作權聲明

本網站為收錄中興大學學術著作及學術產出,已積極向著作權人取得全文授權,並盡力防止侵害著作權人之權益。如仍發現本網站之數位內容有侵害著作權人權益情事者,請權利人通知本網站維護人員,將盡速為您處理。

本網站之數位內容為國立中興大學所收錄之機構典藏,無償提供學術研究與公眾教育等公益性使用。

聯絡網站維護人員:wyhuang@nchu.edu.tw,04-22840290 # 412。

DSpace Software Copyright © 2002-2004  MIT &  Hewlett-Packard  /   Enhanced by   NTU/NCHU Library IR team Copyright ©   - Feedback