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DOI	10.17159/wsa/2020.v46.i2.8231
	Estimating evapotranspiration in a semi-arid catchment: A comparison of hydrological modelling and remote-sensing approaches
	Bugan, Richard; Luis Garcia, Cesar; Jovanovic, Nebo; Teich, Ingrid; Fink, Manfred; Dzikiti, Sebinasi
通讯作者	Bugan, R
来源期刊	WATER SA
ISSN	0378-4738
EISSN	1816-7950
出版年	2020
卷号	46 期号:2 页码:158-170
英文摘要	Reliable spatial data of evapotranspiration (ET) in support of water resources management re limited, ET is a major component of the water balance, in many regions, and therefore it is critical that it be accurately quantified. To identify a product that accurately estimates spatially distributed ET for application in data-scarce regions, an inter-model comparison was conducted between the MOD16 ET dataset and the ET calculated with the calibrated and validated JAMS/12000 hydrological model in the Sandspruit catchment (South Africa). Annual JAMS-ET and MOD16-ET data were generally consistent. Monthly JAMS-ET and MOD16-ET dynamics are influenced by the response of vegetation to precipitation as well as the atmospheric evaporative demand. The maximum correlation coefficient between JAMS-ET and MOD16-ET was 0.82 and it was evident at Lag 0, showing that both ET estimates are in phase when evaluated at the basin scale. The maximum correlation coefficients between the ET estimators and precipitation were 0.67 and 0.70 for JAMS-ET and MOD16-ET, respectively, and this was evident at Lag 2 (1 lag is 1 month) for both methods. This suggests that there is a 2-month delay in the maximum response of ET to precipitation. The models did not exhibit significant dependence on the seasonal distribution of precipitation. The complementary use of hydrological modelling and satellite-derived data may be greatly advantageous to water resources management, e.g., water allocation studies, ecological reserve determinations and vegetation water use studies. The results of the inter-model comparison also provide motivation for the use of the MOD16 ET dataset to estimate ET in data-scarce regions. Additionally, this study provides evidence for the potential use of validated satellite-based ET data as inputs in hydrological models. This may facilitate a more realistic representation of the catchment hydrological processes.
英文关键词	evapotranspiration hydrological modelling remote sensing J2000 MOD16-ET
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000549394400001
WOS关键词	LAND-SURFACE EVAPORATION ; ENERGY BALANCE ALGORITHM ; WESTERN-CAPE-PROVINCE ; MAPPING EVAPOTRANSPIRATION ; WATER-BALANCE ; MODIS ; SYSTEM
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/2XILL650/325075
作者单位	[Bugan, Richard; Jovanovic, Nebo; Dzikiti, Sebinasi] CSIR, Nat Resources & Environm, Stellenbosch, South Africa; [Luis Garcia, Cesar] Univ Catolica Cordoba, CONICET, CIDIE, Cordoba, Argentina; [Teich, Ingrid] Consejo Nacl Invest Cient & Tecn, Inst Fisiol & Recursos Genet Vegetales, CIAP, INTA, Cordoba, Argentina; [Fink, Manfred] Friedrich Schiller Univ Jena, Dept Geoinformat Hydrol & Modelling, Jena, Germany
推荐引用方式 GB/T 7714	Bugan, Richard,Luis Garcia, Cesar,Jovanovic, Nebo,et al. Estimating evapotranspiration in a semi-arid catchment: A comparison of hydrological modelling and remote-sensing approaches[J],2020,46(2):158-170.
APA	Bugan, Richard,Luis Garcia, Cesar,Jovanovic, Nebo,Teich, Ingrid,Fink, Manfred,&Dzikiti, Sebinasi.(2020).Estimating evapotranspiration in a semi-arid catchment: A comparison of hydrological modelling and remote-sensing approaches.WATER SA,46(2),158-170.
MLA	Bugan, Richard,et al."Estimating evapotranspiration in a semi-arid catchment: A comparison of hydrological modelling and remote-sensing approaches".WATER SA 46.2(2020):158-170.