摘要
以中国西北干旱区的疏勒河流域为研究区,利用MODIS遥感数据、全球陆面数据同化系统和实测数据等,基于遥感反演及统计降尺度方法获取疏勒河流域2001-2017年夏季土壤含水量数据,开展疏勒河流域夏季土壤含水量的时空变化分析.结果表明,2001-2017年疏勒河流域夏季土壤含水量整体呈上升趋势.流域干流上游和中下游灌区土壤含水量最高.除敦煌灌区及上游高寒区土壤含水量存在不显著下降趋势外,其余区域主要呈上升趋势.夏季土壤含水量呈6月<7月<8月的趋势,且6月土壤含水量的增加趋势最显著.整体来看,流域土壤含水量随海拔升高而增加,耕地土壤含水量普遍高于草地和林地.
With the Shule River Basin in the arid region of Northwest China as a research area,the MODIS data,global land data assimilation system soil moisture data and measured data were used to obtain the summer soil moisture data on the Shule River Basin from 2001 to 2017 based on the remote sensing inversion and statistical downscaling methods.Analysis was made of the spatiotemporal changes in the summer soil water content of the river basin in order to understand the dynamic changes of water resources therein.The results were as follows:from 2001 to 2017,the summer soil water content in the Shule River Basin showed an overall upward trend,being highest in the upstream,middle and lower reaches of the river basin.The soil moisture content in the Dunhuang irrigation district and the upper alpine region did not decrease significantly and,in the remaining areas,showed an upward trend.The trend of summer soil water content was June<July<August,and the increase in June was the most significant.Soil water content in the watershed increased with elevation,and in cultivated land was generally higher than that in grassland and woodland.
作者
岳东霞
李晨
周妍妍
郭晓娟
晁增祖
郭建军
孟扬
YUE Dong-xia;LI Chen;ZHOU Yan-yan;GUO Xiao-juan;CHAO Zeng-zu;GUO Jian-jun;MENG Yang(College of Earth and Environmental Sciences,Lanzhou University,Lanzhou 730000,China;Key Laboratory of Desert and Desertification,Northwest Institute of Eco-environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China;Lanzhou Country Garden School,Lanzhou 730030,China)
出处
《兰州大学学报（自然科学版）》
CAS
CSCD
北大核心
2022年第2期179-185,共7页
Journal of Lanzhou University(Natural Sciences)
基金
国家自然科学基金项目(41671516)
甘肃省科技重大专项计划项目(19ZD2FA002)。
关键词
土壤含水量
全球陆面数据同化系统数据
时空变化
疏勒河流域
soil moisture content
global land data as simulation system
spatiotemporal variation
Shule River Basin
