文章摘要
张晶晶,王力.黄土高原高塬沟壑区坡面表层土壤水分研究[J].水土保持通报,2011,(1):93~97
黄土高原高塬沟壑区坡面表层土壤水分研究
Surface Soil Moisture Conditions in Gully Region of the Loess Plateau
投稿时间:2010-07-03  修订日期:2010-07-30
DOI:
中文关键词: 土壤水分  变异系数  降雨量  植被覆盖度
英文关键词: soil moisture  coefficient of variation  precipitation  vegetation coverage
基金项目:中国科学院知识创新工程项目"长武县水资源状况、降水集蓄模式与旱作农田生产力适度开发技术"(KSCX-YW-09-07)
作者单位E-mail
张晶晶 西北农林科技大学资源环境学院, 陕西 杨凌 712100  
王力 西北农林科技大学资源环境学院, 陕西 杨凌 712100 wangli5208@nwsuaf.edu.cn 
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中文摘要:
      以长武王东沟小流域径流小区为试验点,研究了于黄土高原高塬沟壑区坡面表层土壤水分特征,分析了降雨量、植被覆盖度对地表土壤水分的影响,旨在为该区植被恢复和水土流失治理提供科学的理论依据.研究结果表明,0-30cm土层土壤含水量呈现中等变异.15°阳坡土壤含水量小于35°半阳坡土壤含水量.土壤水分的变化趋势与降雨量的变化趋势基本一致,0-10cm土层土壤含水量与降雨量具有良好的同步性,而10-20cm土层和20-30cm土层土壤含水量的同步性较差.植被覆盖度越高,其土壤平均含水量就越高,植被覆盖度达到40%时,中坡和下坡的剖面各层土壤含水量随深度增加而减少的趋势更加明显.土壤平均含水量从坡顶到坡底逐渐增加.0- 30cm土层土壤含水量随深度增加而减少.
英文摘要:
      In order to provide theoretical evidences for vegetation recovery and soil loss control in the gully region of the loess plateau,surface soil moisture characteristics were analyzed by addressing the influences of precipitation and vegetation cover on soil moisture.The experimental plots of Wangdonggou basin in Changwu County was selected as the study site.The results show that soil moisture contents in the 0-30cm soil layers varied moderately.Soil moisture contents of sunny slope(15°)were lower than half sunny slopes(35°).The variations of soil moisture contents responded to the rainfall closely;the soil moisture contents in the 0-10cm layers approximately synchronized with rainfall,but the agreement between soil moisture content and rainfall variations was poor in the 10-20cm and 20-30cm layers.It was observed that the higher the vegetation coverage,the higher the mean of moisture contents.When the vegetation coverage was over 40%,the trend that soil moisture content decreased with soil depth became more obviously in soil profiles of middle slope and down slope.The soil moisture means gradually increased from the summit to foot slope.Soil moisture contents decreased with depth in the 0-30cm soil layers.
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