土壤初始含水率对地下滴灌线源入渗土壤水分运动影响的试验研究  

Influence of Initial Water Content on Soil Water Transport under Line Source Permeation of SDI

作　　者：王振华[1] 郑旭荣[1] 任杰[1] 安俊波[1] 王俊亭[1] 胡苏翔[1] 

机构地区：[1]石河子大学水利建筑工程学院,新疆石河子832000

出　　处：《灌溉排水学报》2008年第5期77-79,共3页Journal of Irrigation and Drainage

基　　金：兵团农业科技攻关项目(2006YD27);新疆“十一五”科技攻关重大专项(200731137-1);石河子大学自然科学研究与技术创新项目(ZRKX2006-Q16);石河子大学重大科技攻关专项(gxji2006-zdgg01);石河子大学高层次人才科研启动资金专项(RCZX200539)

摘　　要：通过室内试验,分析了4种土壤初始含水率对地下滴灌线源入渗土壤水分运动规律的影响,结果表明,随着初始含水率的增大,湿润锋向下运移的速度变大,向上和水平方向运移的速度均减小,且滴头下方的土壤含水率相对较高;水平方向在滴头左右相同位置处的土壤含水率基本相同,呈左右对称分布。在相同灌水量情况下,初始含水率越大,湿润锋向上运移的距离越小,向下运移的距离越大。The effects of initial water content on soil water-transport of line source permeation under subsurface drip irrigation（SDI） is analyzed by indoor experiment. The results show that the wetting front transport speed become quickly in down but reduce in up and level direction along with the increment of the soil initial water content, and the water content under the emitter soil is higher than other direction. The water content in level direction presents symmetry distribution. Under the same amount water, the dis- tance of wetting front transport up is less than down when the initial water content become bigger.

关 键 词：地下滴灌 土壤初始含水率 线源入渗 湿润锋 水分运动 

分 类 号：S152.7[农业科学—土壤学]