乌东德库区消落带土壤水分分布特征

消落带土壤水分是制约植物生长发育的关键因素,对库区消落带生态修复意义重大.本文系统分析了乌东德库区消落带修复试验区土壤含水量分布,探索了土壤水分空间变化和影响因素.结果表明:研究区5月水分含量低于5％,不同试验分区和高程区域土壤水分分布受到微地形、土壤特征、植被类型和植被覆盖度等影响.土壤水分随深度变化的主控因素包括地...

Distribution Characteristics of Soil Moisture in the Water-level-fluctuating Zone of Wudongde Reservoir

The soil moisture in the water-level-fluctuating zone is a key factor for plants growth and development,and is vital to the ecological restoration of this zone.This paper systematically analyzed the spatial distribution and variation of soil water content in the restoration area of the Wudongde water-level-fluctuating zone and explored the influencing factors of the soil water charac?teristics.The results show that the soil water content is less than 5%in May,and its distribution at different test zones and eleva?tion areas is significantly affected by Micro-topography,soil characteristics,vegetation type and vegetation coverage.The main fac?tors controlling the moisture change with depth of soil profile are surface evaporation and water absorption by plants.The soil mois?ture at the profile depth greater than 50 cm was the potential water source for plants in the zone.This study provided fundamental data and theoretical references for ecological restoration in the water-level-fluctuating zone of the dry-hot valley reservoir area.