水保所知识产出(1956---)知识库

为了给微孔陶瓷渗灌田间应用技术参数的确定提供一定的参考，以微孔陶瓷灌水器为研究对象，进行了
室内土箱入渗模拟试验，重点研究了土壤初始含水率对微孔陶瓷渗灌入渗特性的影响，建立了以土壤初始含水率和
入渗时间为自变量，分别以累计入渗量和湿润锋运移距离为因变量的经验模型。结果表明:无压条件下土壤初始含
水率对累计入渗量影响较大，随着入渗时间的增加，累计入渗量的变化率逐渐减小。同一入渗时刻，土壤初始含水率
越大，累计入渗量越小，随着入渗时间的增加该现象越明显。不同初始含水率条件下，各方向湿润峰运移距离与时间
呈幂函数关系。

 In this paper，a microporous ceramic emitter was used as the research object to carry out in-situ soil tank infiltration simulation
test to study the influence of initial moisture content of soil on infiltration characteristics of porous ceramics，which provided reference for
determining the field application parameters of porous ceramic infiltration irrigation． An empirical model was established to simulate the
relationship between the cumulative infiltration volume and the wet front migration distance and the initial moisture content and infiltration
time． The results showed that the initial moisture content of the soil under the no-pressure condition had a great influence on the cumulative
infiltration，and as the infiltration time increased，the rate of change of the cumulative infiltration decreased gradually． At the same infiltration
time，the greater the initial soil moisture content，the smaller the cumulative infiltration，and this phenomenon is more and more obvious with
the increase of infiltration time． Under different initial moisture content conditions，the migration distance of the wet peak in each direction is
a power function of time．