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題 名 | 集水區泥砂總量管理策略之研究=Watershed Management Strategy for Total Maximum Daily Load of Sediment |
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作 者 | 陳鴻烈; 蔡大偉; | 書刊名 | 水土保持學報 |
卷 期 | 41:1 2009.03[民98.03] |
頁 次 | 頁93-106 |
分類號 | 436.124 |
關鍵詞 | 總量管理; 泥砂產量; 水里溪集水區; TMDL management; Sediment TMDL; Shuili-stream watershed; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究是以南投縣水里溪集水區為研究對象,運用集水區總量管理模式模擬總量管理策略 之效益,以協助集水區總量管理策略的制定。研究中主要是使用美國環保署集水區管理模式來 進行模擬,研究分為四部分:(1) 選擇適當總量管理目標 ─ 本研究決定以容許土壤流失量與 環保署水質相關指標為依據。(2) 管理策略之選擇 ─ 在考量集水區與管理目標之特性後,決 定以土地管理為重點。(3) 選擇管理重點區 ─ 經由細部土地利用分析後,決定以第5、14 號 子集水區之農地中旱田耕種為管理目標。(4) 管理效益之評估 ─ 透過模式模擬結果發現以同 時治理第5、14 號子集水區之效果最好,泥砂產量控制效益為3046 ton/year,河道懸浮質則為 0.325%。最後整合模擬結果可知,在泥砂產量方面,集水區已接近土砂平衡狀況,因此不需執 行管理策略;在懸浮質方面,因未達總量管理標準,且管理策略成效不顯著,未來仍需配合其 他管理辦法來加強此區之水質管理。 |
英文摘要 | This research is to simulate the benefits of total maximum daily load (TMDL) management of sediment in Shuili-stream watershed, Nantou county. We hope the results can be useful for establishing watershed management policy of TMDL. The TMDL model we used came from US EPA. The study approach was divided into four parts. The first part was to choose the standards of sediment TMDL, and our choices included soil loss tolerance and water quality standards of Taiwan EPA.The second part was to choose suitable management method. After considering the characteristics of watershed and management target, we focused on landuse management. The third part was to find out the emphasized area of management. By analyzing the detail landuse we adopted the dry farmland in NO.5 and 14 subbasin to be the main management target. The fourth part was to estimate the efficiency of landuse management. The simulation results indicated the best efficiency was shown when No.5 and 14 subbasin were simultaneously managed. The management efficiencies for sediments and river suspended solids were 3046 ton/year and 0.325%, respectively. For sediment yield of this watershed, it is close to the balance condition; i.e., this area is no need to execute soil erosion management. Additionally, average suspension loads were still higher than water quality standards. This phenomenon exhibited our management strategies need to be adjusted and to consider adopting other methods to enhance water quality management of this watershed in future. |
本系統中英文摘要資訊取自各篇刊載內容。