摘要
以试验为基础,测定了重壤土、中壤土、砂壤土在不同滴头流量、不同灌水量下的点源入渗运动过程,研究滴灌点源入渗土壤水分分布与运移规律。研究表明点源湿润锋的水平、垂直距离与入渗时间之间符合良好的幂函数关系,湿润锋水平、垂直运移速率与入渗时间均满足良好的幂函数关系,土壤含水率与湿润锋水平、垂直运移距离之间具有良好的线性函数关系,该研究结果对滴灌系统的科学设计和合理运用起到指导作用。
Through experiments, the clay-loam, loam, and sandy soil water movement are measured for soil point source drip irrigation in the different dripper discharge and drop water. Soil water distribution characteristics and movement infiltration are studied in point-source drip irrigation. The result shows that the horizontal and vertical advance distance of soil wetted front conforms to power function of infiltration time for point source drip irriga- tion. The horizontal and vertical advance rates of wetted front are power function of infiltration time. The soil moisture is line function of the horizontal and vertical advance distance. The result has certain guidance functions to the direction of designing and practicing drip irrigation system.
出处
《科学技术与工程》
2008年第15期4292-4295,共4页
Science Technology and Engineering
基金
国家863计划项目(2006AA100207)
国家自然科学基金(50579062)
上海水产大学博士科研基金项目资助
关键词
滴灌
点源入渗
湿润锋
土壤水分分布
drip irrigation point source infiltration wetted front soil water distribution
