不同硝酸钾溶液浓度对垂直一维入渗特性影响研究  

Effect of Different Solution Concentration on Characteristic of One-dimension Vertical Infiltration

作　　者：马雪姣[1] 张建芳[1] 王岩[1] 纪建海[1] 程东娟[2] 

机构地区：[1]河北交通职业技术学院,石家庄050091 [2]河北工程大学,河北邯郸056021

出　　处：《灌溉排水学报》2009年第6期84-86,共3页Journal of Irrigation and Drainage

基　　金：国家自然科学基金项目(50579064;50179030);陕西省高校重点实验室重点科研项目(30JS041)

摘　　要：通过室内不同浓度溶液的垂直一维入渗试验,分析了不同浓度碳酸钾溶液影响下的湿润锋和累积入渗量的变化规律以及土壤含水量和硝态氮浓度的分布规律,由不同浓度溶液累积入渗量,依据GREEN-AMPT入渗模型,反推出湿润锋面平均吸力和饱和导水率,结果表明增大溶液浓度提高了垂直一维入渗的饱和导水率,但减小了湿润锋面的平均吸力,溶液浓度通过影响湿润体的饱和导水率和湿润锋面的平均吸力来影响入渗量,二者的综合作用是增大了入渗量。Through indoor experiment of different concentration solution under one-dimension infiltration,the rule of wetting front and total infiltration volume and the distraction of soil water content and nitric nitrogen concentration were analyzed.Based on total infiltration volume and GREEN-AMPT infiltration model,the saturated hydraulic conductivity and wetting front suction is calculated.With the increasing of solution concentration the saturated hydraulic conductivity increases,while the wetting front suction decreases.Solution concentration has effect on the infiltration volume throughout of the saturated hydraulic conductivity and wetting front suction.

关 键 词：溶液浓度 垂直一维入渗 GREEN-AMPT入渗模型 入渗特性 

分 类 号：S152.7[农业科学—土壤学]