水资源保护2016，Vol.32Issue(5)：17-23,7.DOI:10.3880/j.issn.1004-6933.2016.05.004
湿润地区坡面土壤含水率时空变异性研究
Study on temporal-spatial variability of soil moisture content on hillslope in a humid area
摘要
Abstract
The temporal-spatial variability of soil moisture content on a hillslope in a humid area was analyzed based on field monitoring data. Hourly data over a year were collected with frequency domain reflectometry ( FDR) sensors. Twenty-four sensors near the soil surface and 12 sensors in two profiles were set up to monitor the soil moisture content continuously. The coefficient of variation and semi-variogram were used to analyze the soil moisture content’ s temporal variability in different locations and the spatial variability in different seasons in the study area. The results show that, in the Taihu Basin, the surface soil moisture content exhibited a medium or low level of variability. Soil characteristics, topography, vegetation, meteorological factors, and human activities influenced the temporal-spatial variability of soil moisture. These factors had different effects on the temporal-spatial variability, and the dominant factors were different in each of the four seasons. The semi-variograms for the soil moisture contents in different seasons had similar patterns due to different effects of the factors.关键词
土壤含水率/时空变异性/变异系数/半方差图/湿润地区/坡面Key words
soil moisture content/temporal-spatial variability/coefficient of variation/semi-variogram/humid area/hillslope分类
天文与地球科学引用本文复制引用
刘宏伟,高菲,余钟波,高风华,向龙..湿润地区坡面土壤含水率时空变异性研究[J].水资源保护,2016,32(5):17-23,7.基金项目
国家自然科学基金青年项目(51209139) （51209139）
