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DOI	10.1002/hyp.13748
	Impact of flooded rice paddy on remotely sensed evapotranspiration in the Krishna River basin, India
	Teluguntla, Pardhasaradhi 1; Ryu, Dongryeol 1; George, Biju 1; Walker, Jeffrey P.2
通讯作者	Teluguntla, Pardhasaradhi ; Ryu, Dongryeol
来源期刊	HYDROLOGICAL PROCESSES
ISSN	0885-6087
EISSN	1099-1085
出版年	2020
卷号	34 期号:10 页码:2190-2199
英文摘要	Evapotranspiration (ET) is one of the major water exchange processes between the earth's surface and the atmosphere. ET is a combined process of evaporation from open water bodies, bare soil and plant surfaces, and transpiration from vegetation. Remote sensing-based ET models have been developed to estimate spatially distributed ET over large regions, however, many of them reportedly underestimate ET over semi-arid regions (Jamshidi et al., Journal of Hydrometeorology, 2019, 20, 947-964). In this work, we show that underestimation of ET can occur due to the open water evaporation from flooded rice paddies ignored in the existing ET models. To address the gap in ET estimation, we have developed a novel approach that accounts for the missing ET component over flooded rice paddies. Our method improved ET estimates by a modified Penman-Monteith algorithm that considered the fraction of open water evaporation from flooded rice paddies. Daily ET was calculated using ground based meteorological data and the MODIS satellite data over the Krishna River Basin. Seasonal and annual ET values over the Krishna Basin were compared with two different ET algorithms. ET estimates from these two models were also compared for different crop combinations. Results were validated with flux tower-based measurements from other studies. We have identified a 17 mm/year difference in average annual ET over the Krishna River Basin with this new ET algorithm. This is very critical in basin scale water balance analysis and water productivity studies.
英文关键词	evapotranspiration flooded rice paddy Krishna River basin MODIS remote sensing ET
类型	Article
语种	英语
国家	Australia
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000521624400001
WOS关键词	SPECTRAL MATCHING TECHNIQUES ; ENERGY BALANCE ALGORITHM ; TIME-SERIES DATA ; MAPPING EVAPOTRANSPIRATION ; MODIS ; EVAPORATION ; AREAS ; MANAGEMENT ; FLUX
WOS类目	Water Resources
WOS研究方向	Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314692
作者单位	1.Univ Melbourne, Dept Infrastruct Engn, Melbourne, Vic, Australia; 2.Monash Univ, Dept Civil Engn, Clayton, Vic, Australia
推荐引用方式 GB/T 7714	Teluguntla, Pardhasaradhi,Ryu, Dongryeol,George, Biju,et al. Impact of flooded rice paddy on remotely sensed evapotranspiration in the Krishna River basin, India[J],2020,34(10):2190-2199.
APA	Teluguntla, Pardhasaradhi,Ryu, Dongryeol,George, Biju,&Walker, Jeffrey P..(2020).Impact of flooded rice paddy on remotely sensed evapotranspiration in the Krishna River basin, India.HYDROLOGICAL PROCESSES,34(10),2190-2199.
MLA	Teluguntla, Pardhasaradhi,et al."Impact of flooded rice paddy on remotely sensed evapotranspiration in the Krishna River basin, India".HYDROLOGICAL PROCESSES 34.10(2020):2190-2199.