摘要
利用濉溪县耕层土壤含水量和同期观测的降水量、蒸发量资料分析表明:耕层土壤含水量的消长与基期土壤含水量、期间降水量和蒸发量呈多元直线相关关系,其中耕层土壤含水量增加量主要取决于基期土壤含水量的高低和降水量的多少;土壤含水量减少量主要取决于蒸发量的多少和基期土壤含水量的高低。耕层土壤相对含水量在50%～65%之间,需降水或补充灌溉15.9～82.3mm的水量。降水效力与基期土壤含水量和降水量呈多元指数曲线关系,蒸发效力与基期土壤含水量呈指数曲线关系。耕层土壤含水量的消退呈“快—缓慢—滞缓”的变化过程。使耕层相对含水量达到80%以上的一次降水(过程)过后,连续9.2～39.6d无降水耕层相对含水量尚可维持在60%以上。
Analysis of the soil moisture content in topsoil, precipitation, transpiration shows that there are multi-dimensional straight line correlation relations between increase and decrease of topsoil soil moisture content, base period soil moisture content, period precipitation and transpiration, in which the increase of topsoil soil moisture content mainly lie on the height of base period soil moisture content and quantity of precipitation, the decrease of soil moisture content mainly lie on the quantity of transpiration and height of base period soil moisture content. The relative soil moisture content is about 50%-65% in topsoil, which needs 15.9- 82.3mm of precipitation or irrigated water. There is a multi-dimensional exponential curve relation between precipitation capacity, base period soil moisture content and precipitation. There is also a exponential curve relation between evaporation capacity and the base period soil moisture content.
出处
《水文》
CSCD
北大核心
2007年第3期50-52,56,共4页
Journal of China Hydrology
关键词
土壤含水量
消长规律
降水量
蒸发量
耕层
soil moisture content
increase and decrease rule
precipitation
transpiration
topsoil
作者简介
苏玉杰（1965-），男，安徽灵壁人，工程师，学士学位，主要从事农业气象研究与应用。
