田间测定土壤导水率的方法研究进展

 土壤导水率是决定坡地降水入渗与径流比例的关键,也是水分循环和土壤侵蚀模型中的重要参数,国内外对相关理论与方法进行了大量研究。综述田间测定土壤导水参数的几种方法的原理及应用,并对各种方法的优缺点进行对比分析。人们趋向于应用简单快速的测定仪器,降水头方法因为用水少,测定快速,有很大发展空间。盘式入渗仪是一种既简便又可以获得较多信息的测定仪器,可以应用于坡地土壤导水率的测定,应当广泛开展相关研究。

Development about methods of soil hydraulic conductivity determination in fields

Soil hydraulic conductivity is an important factor for determination of proportion of precipitation infiltration to runoff in slope,and which is a key parameter in soil moisture circulation and soil erosion models.A great deal of theories and methods about it were studied in the world.The theories and application about methods of parameter determination on soil hydraulic conductivity in fields are reviewed,and the advantages and disadvantages of those methods are analyzed.Brief and clipping apparatus of determination soil hydraulic conductivity would be applied gradually,and the method of reducing head of emitter would be applied widely because of saving water and determination speediness.Disc infiltrometer is a portable apparatus,the more information and data could be selected by which,and which could be used in determination of soil hydraulic conductivity in slope,so the relative research about it should be developed widely.