DOI: 10.5194/hess-22-2775-2018
论文题名: Comparison of MODIS and SWAT evapotranspiration over a complex terrain at different spatial scales
作者: Abiodun O.O. ; Guan H. ; Post V.E.A. ; Batelaan O.
刊名: Hydrology and Earth System Sciences
ISSN: 1027-5606
出版年: 2018
卷: 22, 期: 5 起始页码: 2775
结束页码: 2794
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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163312
Appears in Collections: 气候变化与战略
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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
Recommended Citation:
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]. Hydrology and Earth System Sciences,2018-01-01,22(5)