基于HYDRUS的黄土高原丘陵沟壑区土壤水分入渗模拟  

Soil Water Infiltration Simulation in Hilly and Gully Region of Loess Plateau Based on HYDRUS

作　　者：董起广 DONG Qi-guang(Shaanxi Provincial Land Engineering Construction Group Co.,Ltd.,Xi＇an 710075,China;Institute of Land Engineering and Technology,Shaanxi Provincial Land Engineering Construction Group Co.,Ltd.,Xi＇an 710075,China;Key Laboratory of Degraded and Unused Land Consolidation Engineering,the Ministry of Land and Resources,Xi＇an 710075,China;Shaanxi Provincial Land Consolidation Engineering Technology Research Center,Xi＇an 710075,China)

机构地区：[1]陕西省土地工程建设集团有限责任公司,西安710075 [2]陕西地建土地工程技术研究院有限责任公司,西安710075 [3]国土资源部退化及未利用土地整治重点实验室,西安710075 [4]陕西省土地整治工程技术研究中心,西安710075

出　　处：《节水灌溉》2018年第8期90-92,98,共4页Water Saving Irrigation

基　　金：陕西省自然科学基础研究计划项目(2017JQ4026)

摘　　要：根据黄土高原丘陵沟壑区小流域的观测资料,利用HYDRUS软件建立了该区域的土壤水分运移模型,分析了在降水条件下沟道不同地理位置及不同土层深度下土壤水分的分布规律,将模拟结果与实测数据进行了对比验证,同时利用该模型对暴雨条件下土壤水分的运移进行了模拟。结果显示,建立的模型能够较好地反映当地土壤水分的运移状况,模拟结果显示暴雨结束后,上游20及40 cm深处土壤水分含量降低相对较快,下游40 cm深处土壤水分含量降低最慢,且保持了较高水平。Based on the observation data of the small watershed in the hilly and gully regions of the Loess Plateau,the model of soil water movement was established by using HYDRUS software. The distribution of soil water under different rainfall conditions and in different soil depths was analyzed. The simulation results are compared with the measured data. At the same time,the model is used to simulate the soil moisture transport under heavy rain conditions. The results show that the model established can well reflect the movement of soil moisture. The simulation results show that： after the rainstorm,the soil moisture content in the depth of 20 cm and 40 cm decreases relatively fast,and the soil water content in the depth of 40 cm decreases the slowest and maintains a high level.

关 键 词：黄土高原丘陵沟壑区 HYDRUS模型 土壤水分 

分 类 号：S152.4[农业科学—土壤学]