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來源資料
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題 名 | 雲林地區水田入滲量之評估=Evaluation on the Infiltration Rate of Paddy Field in Yun-Lin Area |
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作 者 | 劉振宇; 陳世楷; 周曉雯; | 書刊名 | 農業工程學報 |
卷 期 | 45:1 1999.03[民88.03] |
頁 次 | 頁38-54 |
分類號 | 434.287 |
關鍵詞 | 入滲; 水田; 地下水補注; 牛踏層; 水力傳導係數; Infiltration; Paddy field; Groundwater recharge; Hard pan; Hydraulic conductivity; |
語 文 | 中文(Chinese) |
中文摘要 | 水田具有生產、生活與生態等多種公益功能。且因水田灌溉長期保持田面湛水狀 態,為涵養地下水主要來源之�C。本研究以水稻田土壤水流入滲理論模式 SA- WAH、水利局 推求灌溉需水量之滲漏公式來推估雲林地區水稻田之入滲量。針對水田具有之牛踏層特性, 以麻園工作站上新小組之灌溉用水資料, 選定牛踏層厚度為 7.5 公分,飽和水力傳導係數 為 0.03 ∼ 0.055 cm/day,作為推估之依據。 結果顯示雲林水利會區域內,平均每年水稻 田灌溉面積約為 56031-58993 公頃, 以模式模擬水稻田年總進入牛踏層之通量為 2.167-2.248 億立方公尺; 另以水利局入滲經驗公式所推求之水田滲漏量一年約為 3.770-3.891 億立方公尺,後者約為前者之 1.73 倍。因水利局公式考慮水稻生長所需之充 足用水,故在推估入滲量時有寬估之虞。利用模式所得之推估結果配合地理資訊系統之應用 可明瞭其地理區位與地下水入滲補注區位間之關係,提供地下水資源規劃決策及評估之依據 。後續研究可就牛踏層之土壤物理特性詳細調查,並配合三維模式考慮側漏量,應可得較精 確之結果。 |
英文摘要 | Flooded paddy field exhibits productive, ecological and environmental multifunctions. Since the paddy field has long term ponded with water, it becomes one of the major sources for groundwater recharge. A one-dimensional, Darcy-based soil/water balance model SAWAH and an empirical equation used by Taiwan Provincial Water Conservancy Bureau are adopted to estimate the quantity of infiltration from the paddy field in Yun-Lin, A 7.5cm thickness hard pan soil with 0.03 ∼ 0.055 cm/day hydraulic conductivity is selected to analyze the irrigated data from Shan-Shin group, Mayan station in Yun-Lin. The simulated result from SAWAH model shows the flux infiltrating into hard pan ranges from 0.2167 to 0.2248 billion cubic meters annually. The infiltration estimated from empirical equation ranges from 0.337 to 0.3891 billion cubic meters per year is 1.73 times larger than the result from model simulation. The empirical equation is designed to estimate the amount of irrigation water for rice grow up in the paddy field and may be over-estimated. The simulated annual infiltration combine with the Geographical Information System can help to locate the potential recharge area in Yun-Lin. The results is useful to the government for planning and management of groundwater resources. To accurately evaluate the annual infiltration from irrigated paddy field, a three-dimensional model simulation with detailed hydraulic conductivity data of hard pan soil is suggested to carry out in the future. |
本系統中英文摘要資訊取自各篇刊載內容。