降水条件下排土场非饱和带水分运移规律模拟研究

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	作者：郭峻 关键词：排土场 ; 非饱和带 ; 优势路径 ; 含水率 ; 湿润峰 ; HYDRUS-2D 中文刊名：ZSUX 英文刊名：China Water Transport 机构：昆明理工大学; 出版日期：2019-07-15 出版单位：中国水运(下半月) 年：2019 期：v.19 语种：中文; 页：ZSUX201907038 页数：3 CN：07 ISSN：42-1395/U 分类号：83-85

摘要

我国矿产资源十分丰富,普遍存在排土场随意堆积的现象。基于滤波算法随机生成的两种质地的排土场介质空间分布场,采用HYDRUS-2D模拟降雨强度为0.55cm/h条件下排土场非饱和带水分运移规律。通过观测点含水率变化及湿润峰下移来分析不同质地、倾斜层分布、侧向渗流对水分运移规律的影响。结果表明:排土场介质质地对非饱和带水分运移起着控制的作用,粗/细质介质的交界面具有阻滞和减渗作用。粗质介质的倾斜层空间分布影响着非饱和带中优势路径的形成,在重力势的作用下水分易汇聚于倾斜层的下界面处,粗质介质中湿润峰下移快于细质介质,细质介质中水分运移除了受到重力势的作用外,还会受到侧向土水势梯度的影响。
        

引文

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