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題 名 | 平地水筒模式於水田區域排水分析之應用研究=Study on Drainage Analysis of Paddy Fields by the Diffusive Tank Model |
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作 者 | 陳榮松; 黃盈華; | 書刊名 | 農業工程學報 |
卷 期 | 46:3 2000.09[民89.09] |
頁 次 | 頁59-68 |
分類號 | 434.2572 |
關鍵詞 | 平地水筒模式; 水田; 排水分析; The diffusive tank model; Paddy fields; Drainage analysis; |
語 文 | 中文(Chinese) |
中文摘要 | 利用平地水筒模式進行水田區降雨逕流模擬時,模式參數的決定是很重要的。平地水筒模式所需的參數中,河道粗糙係數可由現場渠道實際狀況評估而來,單位面積堰口寬可由現場實際量測求得,而所剩下的流量係數則須以率定的方式來決定。單位面積堰口寬經現場實際量測所得之平均值為1.025 m/ha。此外,由於流量係數的率定將會受到試驗流域之田區水筒及河道水筒的劃分方式所影響,故本研究將以設置於宜蘭礁溪之水田試驗區,來探討不同的劃分方式對流量係數的影響程度。率定結果顯示,流量係數約為0.01,且流域水筒劃分大小不同對該參數之率定影響並不大。最後,有鑑於水稻田具有較相同的經營方式,故在宜蘭礁溪試驗區所求得之堰口寬實測值與流量係數率定值除了在宜蘭礁溪試驗區之外,亦利用立地條件不同之臺南新營水田試驗區進行平地水筒模式對不同水田區排水模擬的驗證。由於在兩試驗區的模擬效果甚佳,初步證實了在宜蘭礁溪試驗區所求得之平地水筒模式參數對不同地區之水田區排水分析的通用性。 |
英文摘要 | It is very important to determine the model parameters before using the diffusive tank model to simulate rainfall-runoff process of paddy fields. The roughness of channels can be obtained by evaluating the locale condition of channels and the notch width of rectangular contracted weir can be obtained by measuring the actual sizes in paddy fields. But the discharge coefficient remained has to be determined by fitting method. In this study, by way of measurement in paddy fields, the average value of notch width of rectangular contracted weir was obtained with 1.025 m/ha. Furthermore, the evaluation of discharge coefficient is affected by the dividing way of field tank and river tank in experimental catchment, therefore, in this study, the Jyau-Shi experimental catchment in Ilan was established to discuss the influence of the dividing ways. The fitting result showed that the discharge coefficient is about 0.01 and is not significantly affected by the dividing ways. Finally, due to the similarity of the operation mode in paddy fields, model parameters obtained in Jyau-Shi experimental catchment can be used to test and verify the drainage simulation effect by different storm events not only in Jyau-Shi experimental catchment but also in Shing-Ying experimental catchment in Tainan. The good results in drainage simulations of the two experiment catchments suggest that the model parameters of paddy fields can be generally used in different paddy fields. |
本系統中英文摘要資訊取自各篇刊載內容。