四川简阳地区砂岩层中水分利用研究

分析了四川简阳地区砂岩和土壤中的水分运动特性和砂岩中储存的水分对土壤水分补给量的多少。对当地的砂岩和土壤进行了水分特征曲线的测定试验、入渗试验和蒸发试验,并采用研究中常用模型对试验结果进行了拟合,通过对拟合结果的分析,得出了当地土壤和砂岩的水分特性,总结出了该地区表面土层在缺水时水分很容易被下部砂岩层补给,砂岩中的水分是作物利用的重要水资源的结论。这对于充分利用当地水资源,合理确定类似地质条件地区灌溉定额,解决无灌溉条件丘陵区作物缺水问题,实现农业节水灌溉有一定的参考价值。

Study of Using Water Storage in Sandstone in Jianyang of Sichuan

This paper analyzed the characteristics of water in sandstone and soil in Jianyang region of Sichuan.The soil water retention curve,infiltrating characteristics and evaporation characteristics of soil and sandstone in Jianyang region of Sichuan were determined by three experimentations.From analysis we get a conclusion that the sandstone can supply water to the soil,which has a low moisture reserve when the soil is dry,and the water saved in the sandstone is a important form of water resource used by crops.Though calculating the value of moisture supplied by sandstone in experimental conditions,we prove that the local crops can gain enough water that is required for growth without irrigation.The study supplies a reference for utilization of water resource in sandstone,making irrigation quota reasonably in similar geologic condition,solving the water lack of crops in hill area without irrigation conditions.It is helpful to develop agriculture with saving water in irrigation.