干旱区生态环境知识资源中心(Arid): Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System

Arid

DOI	10.1007/s11053-020-09728-x
	Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System
	Jahangir, Mohammad Hossein; Arast, Mina
通讯作者	Jahangir, MH
来源期刊	NATURAL RESOURCES RESEARCH
ISSN	1520-7439
EISSN	1573-8981
英文摘要	Soil moisture is a vital resource that plays a critical role in arid and semi-arid areas. In the present study, a new approach was adopted to estimate surface soil moisture based on multi-index models using reflective and thermal indices as well as surface energy balance system-Iran (SEBS-Iran) in pastures and farmlands in Qom province, Iran in 2016-2017. To select the best model based on remote sensing (RS) indices, 12 models were designed and after analysis, the best ones were selected. Afterward, the results of the SEBS-Iran algorithm and the improved multi-index model [normalized multi-band drought index (NMDI), normalized difference vegetation index (NDVI), land surface temperature (LST) and the temperature vegetation dryness index (TVDI)] were calibrated with field data in the two studied fields (pastures and farmlands). The findings indicated that the multi-index model NMDI-TDVI-LST-NDVI (R = 0.95) and SEBS-Iran (R = 0.93) both had significant correlations with measured soil moisture. Regarding both models in farmlands and pastures, the SEBS-Iran regression model was closer to the line of fit, andR(2)in the two fields was 0.95 and 0.96, respectively. Compared to SEBS-Iran, the multi-index model showed lower coefficient of determination in pastures (0.71) due to the higher accuracy of SEBS-Iran in areas with lower vegetation density. Generally, both methods were found to be suitable for soil moisture estimation. The multi-index model can be used to estimate soil moisture in densely vegetated areas on a large scale due to its simplicity and good accuracy. Moreover, the highly accurate SEBS-Iran model can be used even in sparsely vegetated areas.
英文关键词	Arid and semi-arid Evapotranspiration Dryness Dry and wet border Soil moisture regime changing
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000559405900001
WOS关键词	WATER-STRESS ; VEGETATION INDEXES ; CROP YIELD ; TEMPERATURE ; EVAPOTRANSPIRATION ; NDVI ; SEBS ; TVDI
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328154
作者单位	[Jahangir, Mohammad Hossein] Univ Tehran, Fac New Sci & Technol, Renewable Energies & Environm Dept, Tehran, Iran; [Arast, Mina] Univ Kashan, Fac Nat Resources & Earth Sci, Dept Desert Control, Kashan, Iran
推荐引用方式 GB/T 7714	Jahangir, Mohammad Hossein,Arast, Mina. Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System[J].
APA	Jahangir, Mohammad Hossein,&Arast, Mina.
MLA	Jahangir, Mohammad Hossein,et al."Estimation of Surface Soil Moisture Based on Improved Multi-index Models and Surface Energy Balance System".NATURAL RESOURCES RESEARCH