干旱区生态环境知识资源中心(Arid): 基于地表温度-植被指数特征空间的区域土壤水分反演

Arid

	基于地表温度-植被指数特征空间的区域土壤水分反演
其他题名	Regional Soil Moisture Inversion Based on Surface Temperature and Vegetation Index Characteristic Spaces
	伍漫春 1; 丁建丽1 ; 王高峰 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2012
卷号	32 期号:1 页码:148-154
中文摘要	针对目前西北地区广泛存在的农业干旱问题,选取了新疆塔里木盆地北缘渭干河-库车河三角洲绿洲为研究区,选择云量较少的两幅TM影像,建立地表温度-植被指数特征空间。首先利用线性方程拟合了特征空间的上下边界,比较利用归一化植被指数(NDVI)建立的地表温度-植被指数特征空间T_s/NDVI和利用改进型土壤调整植被指数(MSAVI)构建的地表温度-植被指数特征空间T_s/MSAVI形状的差异,并计算得到两种温度植被干旱指数(Temperature vegetation dryness indexTVDI,分别为TVDI_N和MTVDI)。对TVDI与同期野外不同深度的实测土壤重量含水量数据进行回归分析,建立TVDI估测土壤水分的经验模型并对模型进行验证。研究结果表明,TVDI_N和MTVDI均能够反演表层土壤水分,其中MTVDI与土壤水分相关性比TVDI_N与土壤水分相关性要高,MTVDI能够更好地反映区域土壤水分状况,是一种更有效的土壤水分监测方法,对农业干旱监测具有一定的科学依据。
英文摘要	Monitoring of soil moisture is very important in drought agricultural region in northwest China.We choose a delta oasis between the Weigan River and the Kuqa River in north rim of the Tarim Basin as study area,and two TM images with relatively less cloud shadow contamination are used to establish the surface temperature-vegetation index(T_s/VI) characteristic spaces.The lower and upper boundaries of the T_s/VI characteristic spaces are approximately fitted with linear regression functions,so that the dry and wet edges of the space can be determined.Two T_s/VI spaces were established based on the T_s/NDVI and T_s/MSAVI,and their differences of shapes were investigated.Two kinds of the Temperature-Vegetation Dryness Index(TVDI) were calculated from the T_s/NDVI and the T_s/MSAVI spaces: TVDI_N and MTVDI.Regression analysis was made between TVDI and contemporaneous field measured soil moisture data,so that with the regression model,soil moisture could be assessed based on TVDI.Results showed that TVDI_N and MTVDI could all be used to predict the near surface soil moisture,except that the MTVDI had a better correlation with soil moisture compared to the TVDI_N,and MTVDI can effectively reflect the near surface soil moisture.Therefore,MTVDI is a useful method to monitor and assess soil moisture,and it can be used as a guide for monitoring agriculture drought.
中文关键词	土壤水分 ; 植被指数 ; 特征空间
英文关键词	TVDI TVDI soil moisture vegetation index characteristic space
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4419532
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/228966
作者单位	1.新疆大学资源与环境科学学院, 绿洲生态教育部重点实验室, 乌鲁木齐, 新疆 830046, 中国; 2.昌吉州治蝗灭鼠指挥部办公室, 昌吉, 新疆 831100, 中国
推荐引用方式 GB/T 7714	伍漫春,丁建丽,王高峰. 基于地表温度-植被指数特征空间的区域土壤水分反演[J]. 新疆大学,2012,32(1):148-154.
APA	伍漫春,丁建丽,&王高峰.(2012).基于地表温度-植被指数特征空间的区域土壤水分反演.中国沙漠,32(1),148-154.
MLA	伍漫春,et al."基于地表温度-植被指数特征空间的区域土壤水分反演".中国沙漠 32.1(2012):148-154.