摘要
利用常规统计方法对川中丘陵区盐亭县截流小流域土壤水分空间监测资料进行了分析。结果表明,小流域土壤水分空间分异明显,且主要受地形和微地貌控制,台地水分含量明显高于坡地;土壤剖面垂直变化复杂,水分分层不明显;流域多级台地中,中、高台位土壤水含量大于低台位,中台位大于高台位;土壤水分随坡向的分异规律有:北向坡>南向坡>西向坡;同台林地水分含量大于农地;土壤水分空间分异随时间变化小,具有时稳性。研究还表明,流域内存在可反映流域表层土壤平均水分状况的均值点,可作为流域平均土壤含水量的监测点。
Detailed spatially measurements of soil moisture were conducted weekly within Jieliu catchment of hilly area of the Central Sichuan Basim from May 1998 to March 2001. Results indicated that soil moisture has no significant profile patterns and spatial heterogeneity of soil moisture depends on relief mainly.Effects of lands us on the spatial heterogeneity of soil moisture are considerable. Study also shows the spatial distribution of soil moisture is time-stable and there are some time-stable monitoring sites which can represent mean areal soil moisture content in the catchment.
出处
《山地学报》
CSCD
2004年第1期116-120,共5页
Mountain Research
基金
中科院知识创新项目(KZCX2-SW-330
KZCX2-SW-319)。~~
关键词
土壤水分
空间分异
时稳性
Soil moisture
Spatial heterogeneity
Time stability
