摘要
以长武王东沟小流域为研究对象 ,研究了黄土高原沟壑区小流域的土壤水分分布特征。结果表明 :在王东沟小流域内 ,土壤剖面中 0— 2 m的土层经过一个雨季之后 ,土壤水分得到了部分的恢复 ;2 m以下土层 ,由于没有水分补给 ,相对比较干燥。该流域内农地的土壤贮水量高于草地 ,草地高于果园地 ,林地的土壤贮水量最低。而在同一地理位置 ,土壤的水分分布又受坡度、坡向、坡位、植被类型、植被密度和生物量的影响 。
The distribution characteristics of soil water in Wangdonggou watershed in gully region of the loess plateau are studied. The results show that the soil water have renewed in a certain extent after a rainy period in 2 m soil profile. In the soil profile below 2 m, soil water is dry without water supply. In the whole watershed, the average soil water storage of farm land, grass land, orchard land, and forest land are 465.3 mm, 452.8 mm, 450.2 mm, and 424 mm in 2 m soil profile; and 627 mm, 620.6 mm, 598.8 mm, and 542.7 mm in 3 m soil profile. In general, farm land >grass land> orchard land>forest land in soil water content. In the same time, soil water distribution is affected by slope degree, slope direction, slope location, plant category, plant density, and biomass. Moreover, it has some spatial variability.
出处
《水土保持通报》
CSCD
北大核心
2002年第4期6-9,共4页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金 (5 0 0 790 2 3 )
国家"十五"科技攻关项目
黄土高原土壤侵蚀与旱地农业国家重点实验室基金资助项目
关键词
黄土高原沟壑区
小流域
土壤水分
空间分布特征
gully region of loess plateau
small watershed
soil water
distribution characteristics
