耦合试验与模型计算的表土渗透系数推求方法  

Method of estimating infiltration coefficient of topsoil by coupling test and model calculation

作　　者：黄金柏 戚颖[2] 王斌[2] 温佳伟[3] 

机构地区：[1]扬州大学水利与能源动力工程学院,江苏扬州225009 [2]东北农业大学水利与建筑学院,黑龙江哈尔滨150030 [3]扬州大学信息工程学院,江苏扬州225009

出　　处：《水资源与水工程学报》2016年第1期201-205,共5页Journal of Water Resources and Water Engineering

基　　金：国家自然科学基金项目(41271046);扬州大学科学研究启动基金(5015-137010583);扬州市绿扬金凤计划(yzlyjfjh2013YB105)

摘　　要：针对黄土高原北部六道沟流域5种土地利用方式开展了表土渗透与比贯入阻力试验,并基于水量平衡原理及稳定渗透理论构建了表土非饱和渗透系数简易渗透模型,耦合两种试验和模型推求了表土非饱和渗透系数。研究结果表明:在研究区内,非饱和渗透系数和表土比贯入阻力的相关系数在0.93以上,表土非饱和渗透系数的数量级为10-5m/s,各种土地利用方式下表土非饱和渗透系数大小次序为:坡面苜蓿地<坡面草地<草地(淤地)<农田(淤地)<裸地(沙黄土)。研究结果可为土壤水力学特性研究及构建渗透模型提供理论与方法的借鉴。Aimed at the five land use patterns of Liudaogou catchment at the northern loess plateau,the paper conducted the experiment of topsoil infiltration and specific penetration resistance. It developed a simple infiltration model for the topsoil based on water balance principle and theory of stable infiltration.The unsaturated infiltration coefficient of topsoil was estimated by combining the results of experiments with model calculation. The results indicated that the correlation coefficient between infiltration rate and topsoil specific penetration resistance is higher than 0. 93; the number grade of unsaturated infiltration rate of topsoil is 10- 5m / s; the sequence of infiltration rate of the five land use patterns from large to small is alfalfa（ on slope land）〈grassland（ on slope land） 〈grassland（ on alluvial plain） 〈farmland（ on alluvial plain） 〈sandy loess（ nudation） .The result can provide the theory and reference for the study on soil hydraulic property and the development of infiltration model.

关 键 词：水量平衡 渗透模型 比贯入阻力 渗透系数 

分 类 号：TV223.7[水利工程—水工结构工程]