考虑植被根系深度动态变化的VIC径流模拟模型  

VIC model for runoff simulation considering dynamic changes of vegetation root depth

作　　者：张珂[1,2,3,4,5] 戴钰 刘林鑫 牛杰帆 毕可心 李志琳 ZHANG Ke;DAI Yu;LIU Linxin;NIU Jiefan;BI Kexin;LI Zhilin(College of Hydrology and Water Resources,Hohai University,Nanjing 210098,China;National Key Laboratory of Water Disaster Prevention,Hohai University,Nanjing 210098,China;Yangtze Institute for Conservation and Development,Hohai University,Nanjing 210098,China;China Meteorological Administration Hydro-Meteorology Key Laboratory,Nanjing 210024,China;Key Laboratory of Water Big Data Technology of Ministry of Water Resources,Nanjing 210098,China)

机构地区：[1]河海大学水文水资源学院,江苏南京210098 [2]河海大学水灾害防御全国重点实验室,江苏南京210098 [3]河海大学长江保护与绿色发展研究院,江苏南京210024 [4]中国气象局水文气象重点开放实验室,江苏南京210024 [5]水利部水利大数据重点实验室,江苏南京210098

出　　处：《水资源保护》2024年第3期28-34,51,共8页Water Resources Protection

基　　金：国家重点研发计划项目(2023YFC30065005);中央高校基本科研业务费专项资金资助项目(B240203007)。

摘　　要：为了提高干旱半干旱地区植被变化影响下的水文模型模拟精度,结合植物根系的垂直分布与气候、土壤条件,提出了基于流域气象和土壤性质等下垫面特征的流域根系平均深度估算方法,以黄土高原地区无定河流域为例,构建了考虑植被根系深度动态变化的可变下渗容量(VIC)径流模拟模型(VIC-DR模型)。将该模型径流模拟结果与有汇流演算的VIC模型(VIC-R模型)结果进行比较。结果表明:与VIC-R模型相比,VIC-DR模型模拟精度显著提高,VIC-DR模型对无定河流域月尺度、日尺度径流量模拟结果的纳什效率系数分别提高了10.6%和8.7%,相对误差分别下降了15.4%和5.1%,与实测值相关系数均大于0.6;VIC-DR模型的模拟结果符合流域实际情况,模型适用性良好。In order to improve the simulation accuracy of the hydrological model under the influence of vegetation change in arid and semi-arid areas,combing with the vertical distribution of plant roots and climate and soil conditions,a method for estimating average root depth in a basin based on underlying surface characteristics such as basin meteorology and soil properties was proposed.With the Wuding River Basin in Loess Plateau region used as an example,a variable infiltration capacity(VIC)model for runoff simulation,considering dynamic changes of vegetation root depth,named VIC-DR model,was constructed.The runoff simulation results of the VIC-DR model were compared with those of the original VIC model with the confluence checking computation,named VIC-R model.The results show that,compared with the VIC-R model,the simulation accuracy of the VIC-DR model was significantly improved.The Nash-sutcliffe efficiency coefficient of the monthly and daily runoff simulation results of the VIC-DR model increased by 10.6%and 8.7%,respectively,the relative error decreased by 15.4%and 5.1%,respectively,and the correlation coefficients between the simulated runoff and measured runoff at monthly scale and daily scale were greater than 0.6.The simulation results of the VIC-DR model accord with the actual situation of the basin,and the model has high applicability.

关 键 词：VIC模型 动态植被根系参数 径流模拟 无定河流域 

分 类 号：P333[天文地球—水文科学]