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土壤入渗性能的线源入流测量方法研究
Authors
刘汗
张亚楠
+4 more
李鑫
毛丽丽
雷廷武
黄兴法
Publication date
1 January 2007
Publisher
Abstract
土壤的入渗性能决定了雨水或灌溉水转换为土壤水、在地表形成径流的数量和引发土壤侵蚀的能量,因而在实践中有很重要的价值。该文提出了一种测量(坡地)土壤入渗能力的方法以及相应的计算模型,设计并构建了完整的测量仪器系统,用数码相机记录水流在地表的湿润面积随时间变化的过程,由此推导得到了计算土壤入渗性能的数学模型,并进行了室内试验。结果表明:水流推进面积、土壤入渗性能与时间均具有很好的幂指数相关关系。采用入渗量和供水量对比的方法,计算出上述试验的测量误差为6.1%,说明该方法具有较高精度。研究结果证实了测量方法、计算模型和试验方法的合理性,该方法简单、省时、省水,对土表要求较低,对野外有较强的适应能力,为今后的进一步研究提供理论依据
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Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources
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Last time updated on 21/09/2018