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Student Number 86322075
Author Wu Pei(吳珮菁)
Author's Email Address No Public.
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Department Civil Engineering
Year 1998
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Return Flow of Rice fram
Date of Defense
Page Count 68
Keyword
  • Return Flow
  • Abstract Abstract    Water resources management becomes important because of two major reasons: the increase of the industrial demand on water resources and soaring cost in developing new sources. In order to manage the agricultural water use efficiently, the role of the irrigation return flow is critical. According to studies, the irrigation return flow accounts for 10% to 75.6% of the total irrigation water in rice paddy fields. This study focuses on the estimation of the quantity of the irrigation return flow.
        Estimation of the return flow correctly would ascertain the suitable irrigation requirement. The study develops an elementary estimation model. The model is then tested on the farm by farm pond 4-5 in Taoyuan , in order to set up a common estimate model.
        According to two case studies, the amount of the irrigation return flow from a rice paddy field is about 28.01% or 26.64% of the total amount of the valid precipitation and the irrigation water. Differ from previous studies, which are limited to the estimation of percolation amount as a whole, this study attempts to identify the horizontal flow movement above the hard pan as well as the vertical flow movement though the hard pan.
    68
    Table of Content 目錄
    中文摘要……………………………………………………I
    英文摘要……………………………………………………II
    目錄…………………………………………………………III
    圖目錄………………………………………………………IV
    表目錄……………………………………………………….V
    第一章 緒論
    1-1 研究動機……………………………………………….1
    1-2 研究目的……………………………………………….2
    1-3 研究方法……………………………………………….2
    1-4 本文架構……………………………………………….3
    第二章 回歸水概述及文獻回顧
    2-1 回歸水產生之原因…………………………………..5
    2-2 回歸水之定義………………………………………..6
    2-3 文獻回顧……………………………………………..7
    第三章 理論分析
    3-1 理論分析…………………………………………..11
    3-1-1 回歸水……………………………………….…11
    3-2 蒸發散量……………………………………………20
    第四章 計算式驗證
    4-1實驗、解析解計算式及MODFLOW模式之分析…..24
    4-2中型砂箱實驗………………………………………24
    4-2-1實驗設備………………………………………………..24
    4-2-2實驗過程………………………………………………..26
    4-3 MODFLOW 模式……………………………………….30
    4-3-1 MODFLOW模式概述 ……………………………………..30
    4-3-2實驗,計算式以及模式結果之比較…………………….32
    4-4大型砂箱實驗………………………………………..36
    4-4-1實驗設備……………………………………………………36
    4-4-2實驗過程……………………………………………………36
    4-4-3實驗與計算式結果之比較………………………………..42
    4-5 現地觀測……………………………………………..44
    4-5-1觀測地區概述……………………………………………….44
    4-5-2 觀測步驟……………………………………………………44
    4-5-3 觀測資料……………………………………………………46
    4-5-4現地觀測之回歸水量計算………………………………….49
    4-5-5結果與討論………………………………………………….49
    第五章 分析與討論…………………………………..51
    5-1 蒸發散量推估結果與比較….…………………….51
    5-2入滲量滲漏量之推估…………….…………………52
    5-2-1相同面積下之側向入滲量……………………………..52
    5-2-2 單位寬度下之側向入滲量………………………………54
    5-3回歸水量之分析…………………………………….55
    5-4垂直入滲量與側向入滲量之探討…………………..59
    第六章 結論與建議
    6-1 結論………………………………………………..64
    6-2 建議………………………………………………..66
    參考文獻………………………………………………
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    Advisor
  • Ray Shyan Wu(吳瑞賢)
  • Files No Any Full Text File.
    Date of Submission

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