基于 Hydrus模拟根灌条件下黄河滩地土壤水分入渗的研究

摘要

The water infiltration and profile distribution in lowland soil of the Yellow River under the condition of 20-cm-deep drip irrigation were studied through indoor measurement and software Hydrus simulation .The results showed that the water content in the 10-cm-distant soil under the dripper was obviously lower than that in the soil around the dripper .The water content in the 10-cm-distant soil above the dripper after the end of drip irrigation was about 0.13 cm/cm3 .The wetting front had a significantly bigger vertical move distance than radial move distance , and its downward movement was the fastest .Through comparison and verification , the simulated results of this study were basically consistent with the observed results .%在室内测定并利用Hydrus软件模拟了在滴灌头埋深20 cm时黄河滩地土壤中水分的入渗及剖面分布规律。结果表明：在滴头下方10 cm处的土壤含水量明显低于在滴头附近的；在滴头上方10 cm处的土壤含水量在滴灌结束时接近0．13 cm／cm3；湿润锋纵向运移距离明显大于径向的，其中以湿润锋下径运移最快。经对比验证，本研究模拟计算结果与观测值较为吻合。