基于HYDRUS-1D模型的黄土积雨入渗数值模拟研究  

Numerical Simulation Study on Loess Rainfall Infiltration Based on HYDRUS⁃1D Model

作　　者：雷磊 王晓东 郑树海 梁俊 张晋 段璟靓 杨貌 田堪良[8,9] LEI Lei;WANG Xiaodong;ZHENG Shuhai;LIANG Jun;ZHANG Jin;DUAN Jingliang;YANG Mao;TIAN Kanliang(Electric Power Research Institute,State Grid Shaanxi Electric Power Company Limited,Xi’an 710100,China;State Grid(Xi’an)Environmental Protection Technology Center Company Limited,Xi’an 710100,China;Water Conservancy and Agricultural Machinery Station of Wuxi Airport Economic Development Zone(Shuofang Street),Wuxi 214142,China;UHV Engineering Construction Company,State Grid Corporation of China,Beijing 100052,China;State Grid Shaanxi Power Company Limited,Xi’an 710048,China;Xi’an Power Supply Company,State Grid Shaanxi Power Company Limited,Xi’an 710032,China;East China Electric Power Design Institute Co.,Ltd.,China Power Engineering Consulting Group,Shanghai 200001,China;Institute of Soil and Water Conservation,Northwest A&F University,Yangling 712100,China;Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling 712100,China)

机构地区：[1]国网陕西省电力有限公司电力科学研究院,陕西西安710100 [2]国网(西安)环保技术中心有限公司,陕西西安710100 [3]无锡空港经开区(硕放街道)水利农机站,江苏无锡214142 [4]国家电网有限公司特高压建设分公司,北京100052 [5]国网陕西省电力有限公司,陕西西安710048 [6]国网陕西省电力有限公司西安供电公司,陕西西安710032 [7]中国电力工程顾问集团华东电力设计院有限公司,上海200001 [8]西北农林科技大学水土保持研究所,陕西杨凌712100 [9]中国科学院水利部水土保持研究所,陕西杨凌712100

出　　处：《人民黄河》2024年第7期138-142,共5页Yellow River

基　　金：国家重点研发计划项目(2017YFC0504703);国网陕西省电力有限公司科技项目(5226KY22000K);陕西中试电力科技有限公司科技项目(SGTYHT/21-JS-226);国网(西安)环保技术中心有限公司科技项目(SGTYHT/21-JS-226)。

摘　　要：为了研究积雨条件下黄土水分入渗规律,设置室内黄土土柱积雨入渗试验,采用HYDRUS-1D模型对积雨入渗规律进行模拟,利用均方根误差(S_(RME))、纳什效率系数(S_(NE))对模拟精度进行评价,采用单因素扰动法对土壤水分特征参数的敏感性进行分析。结果表明:土壤含水率模拟值与试验实测值变化趋势一致,两者误差很小,SRME为0.011~0.017,除土柱深度为20 cm对应的SNE值小于0.900外,其余S_(NE)值均大于0.900,模拟效果较好。土壤水分特征参数对模拟结果影响排序为θ_(s)>k_(s)>n>α>θ_(r),θ_(s)和α扰动与模拟结果负相关,k_(s)、n、θ_(r)扰动与模拟结果正相关,土壤浅层积雨入渗规律受参数扰动的影响较小,随着土柱深度增加,对参数的敏感性逐渐提高,参数变化对模拟结果的影响逐渐增大。In order to study the infiltration law of loess water under rainfall conditions,an indoor loess soil column rainfall infiltration test was set up.The HYDRUS⁃1D model was used to simulate the infiltration law of rainfall,and the simulation accuracy was evaluated by using Root Mean Square Error(S_(RME))and Nash⁃Sutcliffe Efficiency Coefficient(S_(NE)).The sensitivity of soil moisture characteristic parameters was ana⁃lyzed using the single factor disturbance method.The results show that the simulated soil moisture content values have a consistent trend with the measured experimental values,with very small errors.The S_(RME) ranges from 0.011 to 0.017.Except for the SNE value corresponding to a soil column depth of 20 cm,which is less than 0.900,all other SNE values are greater than 0.900,indicating a good simulation effect.The ranking of the impact of soil moisture characteristic parameters on simulation results isθ_(s)>k_(s)>n>α>θ_(r).The disturbance ofθ_(s) andαis nega⁃tively correlated with the simulation results,the disturbance of ks,n andθ_(r) is positively correlated with the simulation results.The infiltration pattern of shallow soil rainfall is less affected by parameter disturbances.As the depth of the soil column increases,the sensitivity of the pa⁃rameters gradually increases,and the impact of parameter changes on the simulation results gradually increases.

关 键 词：黄土 积雨 数值模拟 入渗规律 参数敏感性 

分 类 号：TU444[建筑科学—岩土工程] S152.72[建筑科学—土工工程]