干旱区生态环境知识资源中心(Arid): Satellite-based analysis of regional evapotranspiration trends in a semi-arid area

Arid

DOI	10.1080/01431161.2018.1500727
	Satellite-based analysis of regional evapotranspiration trends in a semi-arid area
	Jin, Xiaomei; Zhu, Xiaoqian; Xue, Yang
通讯作者	Jin, Xiaomei
来源期刊	INTERNATIONAL JOURNAL OF REMOTE SENSING
ISSN	0143-1161
EISSN	1366-5901
出版年	2019
卷号	40 期号:9 页码:3267-3288
英文摘要	A regional framework for a spatial and temporal distributed assessment of time series trends in the hydrological variable and its related ecological factors of an arid area was presented in this research. To achieve this, we tested the Surface Energy Balance System (SEBS) algorithm for estimating evapotranspiration (ET) in regional scale and the result was further validated by water budget. The ET assessment was applied for the Yinchuan and Weining (YW) Plains (China), the upstream areas of the Yellow River. Moreover, we analysed the recent trends (from year 2001 to 2014) in actual ET, normalized difference vegetation index (NDVI), farmland and wetland using a combination of remote sensing and ground observations. The results illustrated that the yearly ET of 78% areas has no change during the study period and the areas with decreasing ET are larger than the areas with increasing trend. The highest decreasing rate is observed in urban areas and the value is -20 mm year(-1), while the rate of increasing trend is especially higher in the wetlands reaching around 60 mm year(-1). This phenomenon can be explained by changes in NDVI, farmland and wetland. The distribution and magnitude of NDVI trends shows that the higher NDVI (NDVI > 0.4) area is occupied 56% and the farmland (NDVI > 0.55) covered about 35% of the YW Plains. The increasing trends of mean NDVI is mostly observed in farmland and shrub covers, while the decreasing NDVI areas are mainly wetlands and urban area. The emerging image showed that the greening trend of vegetation and variation of evapotranspiration in the YW Plains are related to land-cover changes and to the adjustment of crop pattern for agriculture. The increasing of wetland area is also believed as a cause related to evapotranspiration change. Such spatiotemporally distributed analysis in regional level is important for water management at this scale, which can be also applied to other similar areas.
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000463538000001
WOS关键词	SURFACE TURBULENT FLUXES ; BALANCE SYSTEM SEBS ; LATENT-HEAT FLUX ; ENERGY-BALANCE ; LAND-SURFACE ; SOIL-MOISTURE ; WATER-USE ; REMOTE ; MODIS ; TEMPERATURE
WOS类目	Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216496
作者单位	China Univ Geosci, Sch Water Resources & Environm, MOE Key Lab Groundwater Circulat & Environm Evolu, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Jin, Xiaomei,Zhu, Xiaoqian,Xue, Yang. Satellite-based analysis of regional evapotranspiration trends in a semi-arid area[J],2019,40(9):3267-3288.
APA	Jin, Xiaomei,Zhu, Xiaoqian,&Xue, Yang.(2019).Satellite-based analysis of regional evapotranspiration trends in a semi-arid area.INTERNATIONAL JOURNAL OF REMOTE SENSING,40(9),3267-3288.
MLA	Jin, Xiaomei,et al."Satellite-based analysis of regional evapotranspiration trends in a semi-arid area".INTERNATIONAL JOURNAL OF REMOTE SENSING 40.9(2019):3267-3288.