地下滴灌土壤水份之試驗研究

Experimental Investigation of Flow Pattern for Subsurface Drip Irrigation

劉建榮(Chien-Jung Liu) ； 許少華(Shao-Hua Marko Hsu) ； 蔡存孝(Tswn-Syau Tsay) ； 李孟霖(Meng-Lin Li)

《農業工程學報》 53卷3期 (2007/09) Pp. 1-10

https://doi.org/10.29974/JTAE.200709.0001

摘要

SDISDI的方法指的是在地表或地下利用經常性的小流量灌溉方法，SDI的優點包括：(1)機動施灌水量提高產量與品質；(2)經濟使用灌溉水，約可節省25~50%；(3)減少鹽害防止土壤鹽化；(4)節省作物肥料及施肥勞力；(5)減少地下水污染問題；(6)以低流量施灌，對土壤之透水性能保持良好條件。由於水資源的重要性日益增加，在乾旱及半乾旱地區，SDI可適時適量的提供作物需水量。本研究針對SDI中低水壓的地下灌溉(subsurface irrigation)進行砂箱試驗研究，研究目的在於了解地下水灌溉時水分進入土壤後分布的情形及土壤含水量隨時間的變化關係。本研究的試驗結果發現以試驗的各組而言，在20.5ml/min的入滲水量下，可涵蓋水平方向的入滲距離左右至少10公分，試驗所用的含水量計有一定的量測範圍，但本研究試驗之土壤含水量在含水量計可量測之範圍內。未來可以朝向降低入滲水量，以獲得更佳的結果。

關鍵字

SDI ； 土壤含水量

並列摘要

Using small, continuous discharge to irrigate on surface or subsurface is called Micro Irrigation. There were six advantages for using Micro Irrigation. First, variable discharge could get more quantity and quality. Second, Using water efficiently could retrench 25-50% quantity of water. Third, it could avoid soil to be salty. Forth, manure and labors could be reduced. Fifth, it could reduce sources to form groundwater contamination. Sixth, using low discharge to irrigate could keep well conductivity of soil. The significance of water resource was valued in the recent, especially on droughty region. In this study, low pressure for subsurface irrigation was simulated in a sand tank. The purpose was to know the variation and distribution of soil content with time when discharge flowed in.

並列關鍵字

Micro Irrigation ； Distribution