| 恒定水头井入渗Green-Ampt 模型的改进与验证 |
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| 引用本文： | 赵伟霞,张振华,蔡焕杰,谢恒星.恒定水头井入渗Green-Ampt 模型的改进与验证[J].水利学报,2010,41(4). |
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| 作者姓名： | 赵伟霞 张振华 蔡焕杰 谢恒星 |
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| 作者单位： | 1. 西北农林科技大学,旱区农业水土工程教育部重点实验室,陕西,杨凌,712100
2. 鲁东大学地理与规划学院,山东,烟台,264025 |
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| 基金项目： | 国家自然科学基金，国家高技术研究发展计划(863计划)重点项目 |
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| 摘 要： | 在假定恒定水头井入渗近似为以井内积水表面积为入渗面的一维入渗基础上,用湿润体内平均体积含水率增量代替Green-Ampt活塞模型中的饱和含水率与初始含水率差值。用入渗率和累积入渗量倒数的线性关系间接推求Green-Ampt模型中的参数,用湿润锋平均基质吸力和土壤饱和导水率。从而建立了适用于恒定水头井入渗的Green-Ampt模型。同时根据体积等效原理,定义了三维入渗中难以直接测定的概化湿润锋深度。经3种类型土壤的室内试验检验,表明该模型具有较好的精度,能精确地计算不同累积入渗量时的湿润体体积。
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| 关 键 词： | 恒定水头井 模型 验证 |
Improvement and verification of the Green-Ampt model for constant-head well permeameter |
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| ZHAO Wei-xi,ZHANG Zhen-hu,CAI Huan-jie and XIE Heng-xing.Improvement and verification of the Green-Ampt model for constant-head well permeameter[J].Journal of Hydraulic Engineering,2010,41(4). |
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| Authors: | ZHAO Wei-xi ZHANG Zhen-hu CAI Huan-jie and XIE Heng-xing |
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| Affiliation: | ZHAO Wei-xia1,ZHANG Zhen-hua2,CAI Huan-jie1,XIE Heng-xing1(1.Key Laboratory of Agricultural Soil & Water Engineering of Northwest A & F University,Yangling 712100,China,2.Geography , Plan College of Ludong University,Yantai 264025,China) |
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| Abstract: | Based on the hypothesis that the parameter of three dimensional infiltration in constanthead well is similar to one dimensional infiltration,an improved Green-Ampt model,in which the ponded surface is adopted as the infiltration surfarce,is proposed.The increment of the average volumetric water content is used as the substitution for D-value between saturated water content and initial water content,and the linear relationship between infiltration rate and the reciprocal of cumulative infiltration water amou... |
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| Keywords: | Constant-head well permeameter Model verification |
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