新疆阿瓦提丰收灌区砂壤土非饱和土壤水分运动参数的测定与计算  

Field measurement and calculation of unsaturated soil water movement parameters of Fengshou irrigation district in Awati county of Xinjiang

作　　者：胡顺军[1,2] 田长彦[1,2] 宋郁东[1] 

机构地区：[1]中国科学院绿洲生态与荒漠环境重点实验室,新疆乌鲁木齐830011 [2]中国科学院新疆生态与地理研究所,新疆乌鲁木齐830011

出　　处：《干旱地区农业研究》2011年第1期44-47,共4页Agricultural Research in the Arid Areas

基　　金：新疆维吾尔自治区科技攻关重大专项(20073117-3);中国科学院知识创新工程重要方向项目(KZCX2-XB2-03-02);中国科学院"西部之光"人才计划"联合学者"(LHZ200801);国家自然科学基金(编号40771043;40471020)

摘　　要：采用负压计法和双环入渗法在田间分别测定了阿瓦提丰收灌区砂壤土土壤含水率及其对应的土壤水吸力和土壤饱和导水率,采用Sigmaplot软件拟合了Van Genuchten水分特征曲线公式。根据Mualem提出的非饱和土壤导水率公式,建立了该灌区砂壤土非饱和土壤导水率的计算公式,并间接推导了非饱和土壤扩散率和比水容量两个参数的计算公式。Soil water movement parameters are necessary for the solution of the basic soil water movement equation.A set of data about soil water suction corresponding to soil water content were observed by tensiometer method,and the soil saturated hydraulic conductivity was determined by double loop infiltration experiment in the field of Fengshou irrigation district in Awati county of Xinjiang, respectively.A water retention equation based on a closed form equation proposed by Van Genuchten was fitted with Sigmaplot software.The calculation formula for unsaturated hydraulic conductivity was established by employing the equation put forwarded by Mualem.Finally,the calculation formula for soil water diffusivity and specific water capacity were also derived indirectly.

关 键 词：丰收灌区 水分特征曲线 土壤导水率 土壤水分扩散率 比水容量 

分 类 号：S152.7[农业科学—土壤学]