气候变化领域集成服务门户(CCPortal): Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales

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DOI	10.5194/hess-22-2775-2018
	Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales
	Abiodun O.O.; Guan H.; Post V.E.A.; Batelaan O.
发表日期	2018
ISSN	1027-5606
起始页码	2775
结束页码	2794
卷号	22 期号:5
英文摘要	In most hydrological systems, evapotranspiration (ET) and precipitation are the largest components of the water balance, which are difficult to estimate, particularly over complex terrain. In recent decades, the advent of remotely sensed data based ET algorithms and distributed hydrological models has provided improved spatially upscaled ET estimates. However, information on the performance of these methods at various spatial scales is limited. This study compares the ET from the MODIS remotely sensed ET dataset (MOD16) with the ET estimates from a SWAT hydrological model on graduated spatial scales for the complex terrain of the Sixth Creek Catchment of the Western Mount Lofty Ranges, South Australia. ET from both models was further compared with the coarser-resolution AWRA-L model at catchment scale. The SWAT model analyses are performed on daily timescales with a 6-year calibration period (2000- 2005) and 7-year validation period (2007-2013). Differences in ET estimation between the SWAT and MOD16 methods of up to 31, 19, 15, 11 and 9% were observed at respectively 1, 4, 9, 16 and 25 km2 spatial resolutions. Based on the results of the study, a spatial scale of confidence of 4 km2 for catchment-scale evapotranspiration is suggested in complex terrain. Land cover differences, HRU parameterisation in AWRA-L and catchment-scale averaging of input climate data in the SWAT semi-distributed model were identified as the principal sources of weaker correlations at higher spatial resolution. © Author(s) 2018.
语种	英语
scopus关键词	Catchments; Evapotranspiration; Landforms; Radiometers; Remote sensing; Runoff; Calibration periods; Distributed hydrological model; Hydrological modeling; Hydrological system; Remotely sensed data; Semi-distributed model; Spatial resolution; Validation periods; Climate models; catchment; comparative study; complexity; evapotranspiration; hydrological modeling; MODIS; parameterization; performance assessment; soil and water assessment tool; spatial analysis; terrain; Australia; Mount Lofty Ranges; South Australia
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160029
作者单位	Abiodun, O.O., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, SA, Australia; Guan, H., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, SA, Australia; Post, V.E.A., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, SA, Australia; Batelaan, O., National Centre for Groundwater Research and Training, College of Science and Engineering, Flinders University, Adelaide, SA, Australia
推荐引用方式 GB/T 7714	Abiodun O.O.,Guan H.,Post V.E.A.,et al. Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales[J],2018,22(5).
APA	Abiodun O.O.,Guan H.,Post V.E.A.,&Batelaan O..(2018).Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales.Hydrology and Earth System Sciences,22(5).
MLA	Abiodun O.O.,et al."Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales".Hydrology and Earth System Sciences 22.5(2018).