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.
出处
《灌溉排水学报》
CSCD
北大核心
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)
关键词
溶液浓度
垂直一维入渗
GREEN-AMPT入渗模型
入渗特性
solution concentration
one-dimension vertical infiltration
GREEN-AMPT infiltration model
infiltration characteristic
