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題名 | 由生態環境觀點估計水田入滲之數學理論=Mathematical Theory to Estimate Paddy Field Infiltration from the View of Ecological Environment |
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作者 | 郭勝豐; 劉振宇; | 書刊名 | 農業工程學報 |
卷期 | 42:1 1996.03[民85.03] |
頁次 | 頁56-61 |
分類號 | 434.287 |
關鍵詞 | 生態環境; 入滲; 疊代法; 理查方程式; Ecological environment; Infiltration; Iterative method; Richard equation; |
語文 | 中文(Chinese) |
中文摘要 | 為因應政府加入GATT後之農業政策,水田對地下水補注之生態性功能正為學者及政府單位熱烈討論中。目前國內對水田入滲量之估算仍止於田間試驗之經驗公式而無較嚴謹的數學理論加以佐證。本文分析Shan & Stephens等依據Philip方法所提出之一簡單數學理論來了解水田于定水頭下之入滲情形。其推導一系列解析解來模擬水田之入滲率、累積入滲量及土壤水份剖面等狀況,然此解析中所含的四個基本函數需先用疊代法解之。日後希望於本省擇點進行田間試驗來驗證其建立之理論模式,相信能客觀的估計全省水田對地下水之補注量,以提供政府單位由生態環境觀點對水田之定位。 |
英文摘要 | The ecological environment function of paddy field to groundwater recharge is paid attention by researchers and government officials for planning the agricultural policy after Taiwan entering the GATT. Currenty, there are little robustic mathematical theory to estimate the paddy field infiltration, but only empirical equation was used from past study. The purpose of this study is to introduce and analyze the mathematical theory that developed by Shan & Stephens to understand the ponded infiltration with constant water head. A series of generalized equations are introduced to estimate the ponded field's infiltration rate and cumulative infiltration. Yet, the four basic functions that included in each equation need be calculated by iterative method. It is expected that the total amounts of groundwater recharge to paddy field infiltration can be estimated based on the mathematical model with the field experiment in future study. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。