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塔克拉玛干沙漠风沙土潜水极限蒸发强度的理论分析
Authors
宋郁东
徐新文
+4 more
田长彦
胡顺军
陈小兵
雷加强
Publication date
31 December 2007
Publisher
Abstract
潜水蒸发是塔克拉玛干沙漠地区浅层地下水的主要消耗项.潜水极限蒸发强度是在给定的土壤和潜水埋深条件下单位时间内土壤最大可能输送到地表的水量,是建立潜水蒸发计算模型的重要参数和控制条件.利用实测的土壤含水率和土壤水吸力数据,根据Van Genuchten提出的水分特征曲线公式,采用最小二乘法拟合了塔克拉玛干沙漠地区土壤的水分特征曲线方程.采用瞬时剖面法现场测定了非饱和土壤导水率,建立了该区非饱和土壤导水率的计算公式.在对非饱和土壤导水率的计算公式进行概化的基础上,根据非饱和土壤水稳定流理论,推导出计算潜水极限蒸发强度的准解析解.研究结果表明:采用Van Genuchten提出的水分特征曲线公式描述塔克拉玛干沙漠地区土壤水分特性,效果较好;潜水极限蒸发强度随潜水埋深的增大而呈幂函数关系递减
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Institutional Repository of Yantai Institute of Coastal Zone Research, CAS
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oai:ir.yic.ac.cn:133337/3891
Last time updated on 18/09/2018
Institutional Repository of Xinjiang Institute of Ecology and Geography, CAS
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oai:ir.xjlas.org:365004/5405
Last time updated on 29/11/2016