黄河下游冲积平原典型区包气带土壤水分特征曲线的模型优选  

Model Optimization of Soil Water Characteristic Curve of the Vadose Zone in a Typical Area of Alluvial Plain in the Lower Yellow River

作　　者：湛江 李志萍 于小朋 ZHAN Jiang;LI Zhiping;YU Xiaopeng(College of Geosciences and Engineering,North China University of Water Resources and Electric Power,Zhengzhou 450045,China;Collaborative Innovation Center for Efficient Utilization of Water Resources,Zhengzhou 450003,China)

机构地区：[1]华北水利水电大学地球科学与工程学院,河南郑州450045 [2]水资源高效利用与保障工程河南省协同创新中心,河南郑州450003

出　　处：《人民黄河》2022年第12期147-153,共7页Yellow River

基　　金：国家自然科学基金资助项目(41972261);河南省自然资源厅2019—2020年度科技项目(201937913)。

摘　　要：土壤水分特征曲线是水文地质学的重要参数,对于研究水文循环、指导农业生产具有重要意义。土壤水分特征曲线的经验模型是量化该参数的有效途径,但不同经验模型的土壤适用类型和吸力范围有很大不同。为遴选黄河下游地区包气带土壤的水分特征曲线最优经验模型,以河南省兰考县闫楼乡为黄河下游冲积平原典型区,采集了233个包气带土壤样品,选择了6种经验模型,基于粒子群优化算法,对实测水分特征曲线数据分别进行拟合。结果表明:6种经验模型的决定系数为0.8559~0.9998;最终以AIC均值为评价指标,确定了最优模型,其优劣程度为van Genuchten模型>Modified Gardner模型>Biexponential模型>Fredlund&Xing模型>Brooks Corey模型>Campbell模型。Soil water characteristic curve is an important parameter of hydrogeology.It is of great significance to study hydrological cycle,guide agricultural production and formulate soil and water conservation measures.The empirical model of soil water characteristic curve is an effective way to quantify this parameter,but the empirical model has different soil applicability and suction range.In order to select the opti⁃mal empirical model of soil water characteristic curve in the vadose zone of the Lower Yellow River,Yanlou Township,Lankao County,Henan Province was taken as a typical area of the alluvial plain of the Lower Yellow River.233 soil samples of vadose zone were collected,and six empirical models were selected to fit the measured water characteristic curve data based on particle swarm optimization algorithm.The results show that the determination coefficients of the six empirical models are 0.8559 to 0.9998.Finally,the AIC mean value is used as the evaluation index to determine the optimal model and its applicability order is as follows:van Genuchten Model>Modified Gardner Model>Biexponential Model>Fredlund&Xing Model>Brooks Corey Model>Campbell Model.

关 键 词：黄河下游 包气带 土壤水分特征曲线 粒子群优化算法 

分 类 号：P512.22[天文地球—地质学] TV211.12[水利工程—水文学及水资源]