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栗现文,周金龙,赵玉杰,刘延锋.高矿化度对砂性土毛细水上升影响[J].农业工程学报,2011,27(8):84-89.DOI:
高矿化度对砂性土毛细水上升影响
投稿时间:2010-11-11  修订日期:2011-07-12
中文关键词:  砂,土壤,毛细水,水分,干旱区,矿化度
基金项目:国家自然科学基金项目(51069016;50969010);新疆水文学及水资源重点学科基金(xjswszyzdxk20101202);新疆自治区重大科技专项课题(20073117-3; 20073314-4);国家科技支撑计划课题(2007BAD38B01);新疆自治区高校科研计划资助重点项目(XJEDU2007 I13);新疆农业大学农业节水和水资源中心建设基金(20100820)
作者单位
栗现文 1. 中国地质大学环境学院武汉 430074 
周金龙 1. 中国地质大学环境学院武汉 430074 2. 新疆农业大学水利与土木工程学院乌鲁木齐 830052 
赵玉杰 2. 新疆农业大学水利与土木工程学院乌鲁木齐 830052 
刘延锋 1. 中国地质大学环境学院武汉 430074 
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中文摘要:为明晰极端干旱区高盐度潜水蒸发机理,指导盐荒地开发与水盐调控,开展了砂性土条件下,不同粒径及潜水矿化度(1、30、100、250 g/L)组合的毛细水上升试验。结果表明,试验后期毛细水上升规律稳定时段:粗砂土柱,潜水矿化度越大,毛细水上升高度越小;细砂土柱,1 g/L处理毛细水上升高度明显大于其他3组;粉土土柱,不同处理毛细水上升高度由大到小为:30、100、250、1 g/L。试验初始阶段,除粗砂外并不表现为矿化度越大,毛细水上升速度越小的趋势。相比高矿化度,粒径是控制毛细水上升的主要因素。研究表明,土体颗粒较细时(细砂、粉土),高矿化度不仅改变毛细水重力,也使得土体孔隙结构发生不同程度变化,二者综合作用于毛细水上升过程。
Li Xianwen,Zhou Jinlong,Zhao Yujie,Liu Yanfeng.Effects of high-TDS on capillary rise of phreatic water in sand soil[J].Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE),2011,27(8):84-89.DOI:
Effects of high-TDS on capillary rise of phreatic water in sand soil
Author NameAffiliation
Li Xianwen  
Zhou Jinlong  
Zhao Yujie  
Liu Yanfeng  
Key words:sand, soils, capillarity, moisture,arid regions, total dissolved solids
Abstract:Capillary rise is a significant contributor of soil salinity in extremely arid areas and is highly dependent on soil grains and total dissolved solids (TDS) in phreatic water. In this paper, experiments about effects of different grains of sand soil and TDS of phreatic water (1, 30, 100, 250 g/L) on capillary rise were conduced. The results showed that the height of capillary rise was steadily increasing in later stage of experiments and TDS had significant effects on capillary rise. For coarse sand, the higher TDS made the lower height of capillary rise. But for fine sand, the height of capillary rise of 1g/L was obviously larger than others. The sequence of height from lower to larger of capillary rise in silt was 30, 100, 250 and 1g/L. At the beginning of experiments about coarse sand, the higher TDS made the lower velocity of capillary rise, but other soil groups were not. Compared to high-TDS condition, the grain of sand soil was a more primary controlling factor of capillary rise. The research indicates that high-TDS not only changes the gravity of capillary water but also the pore size of soil during the period of capillary rise in fine sand.
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