[1]ZHOU Yanyan,GUO Xiaojuan,GUO Jianjun,et al.Spatiotemporal Dynamics of Evapotranspiration in Shule River Basin Based on SEBAL Model[J].Research of Soil and Water Conservation,2019,26(01):168-177.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 01
Page number:
168-177
Column:
Public date:
2019-02-28
- Title:
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Spatiotemporal Dynamics of Evapotranspiration in Shule River Basin Based on SEBAL Model
- Author(s):
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ZHOU Yanyan1, GUO Xiaojuan1, GUO Jianjun2, ZENG Jianjun1, CHEN Guanguang1, ZOU Mingliang1, YUE Dongxia1
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1. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, China;
2. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
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- Keywords:
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evapotranspiration; SEBAL model; spatial and temporal variation; Shule River Basin
- CLC:
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P237
- DOI:
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- Abstract:
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Evapotranspiration (ET) is an important ecological hydrological process, especially in arid and semi-arid areas, which plays a vital role in environmental change studies. Based on the energy balance principle SEBAL (Surface Energy Balance Algorithms for Land) model in Shule River Basin with DEM, MODIS and meteorological data, we applied ArcGIS software to estimate the ET value of the basin based on the grid scale, and explored characteristics of temporal and spatial variation of ET. The results showed that:(1) the spatial variation range of mean daily ET values in August was 0~8.52 mm on the grid of over Shule River Basin during the period from 2000 to 2015, which had a significant difference in spatial patterns; SEBAL model also showed that spatial patterns of mean daily ET gradually decreased from the southeast to the northwest of Shule River Basin, and that the mean daily ET in the upper reaches of Shule River was greater than ET in the middle and lower reaches of Shule River; (2) the monthly ET of August in 2000-2015 showed the decreasing tendency in most areas over Shule River Basin; (3) the monthly ET and the time stability of value of August in the middle and upper reaches in 2000-2015 were higher than those in the lower reaches, and the spatial difference was significant; (4) the monthly ETs of the four months in 2015 changed significantly, the value decreased in the order:July > April > October > January, and ETs had similar spatial pattern. The quantitative evaluation on temporal and spatial dynamic of ET has an important significance for the environmental simulation, climate change research, irrigation and water resources management in Shule River Basin in order to gain a better understanding of the mechanism of water cycle in arid and semiarid climate zone.