[1]ZHANG Peng,ZHANG Shengwei,XU Ran,et al.Spatiotemporal Dynamics of Evapotranspiration in Horqin Sandy Land Based on Remote Sensing[J].Research of Soil and Water Conservation,2021,28(03):399-405.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 03
Page number:
399-405
Column:
Public date:
2021-04-20
- Title:
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Spatiotemporal Dynamics of Evapotranspiration in Horqin Sandy Land Based on Remote Sensing
- Author(s):
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ZHANG Peng1,4, ZHANG Shengwei1,2,3, XU Ran1, GAO Lu1, GAO Wenlong1, DU Yinlong1
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(1.College of Water Conservancy and Civil Engineering,InnerMongolia AgriculturalUniversity,Hohhot010018,China;2.KeyLaboratory of Protection and Utilization of Water Resources of InnerMongolia autonomous region,Hohhot010018,China;3.InnerMongolia Autonomous Region KeyLaboratory of BigData Research and Application of Agriculture and Animal Husbandry,Hohhot,InnerMongolia010018,China;4.Hydrological Survey Bureau of Ordos City of InnerMongolia,Ordos,InnerMongolia017010,China)
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- Keywords:
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evapotranspiration; MEP model; SEBAL model; land cover; spatio-temporal distribution
- CLC:
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TV11; TP79
- DOI:
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- Abstract:
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Accurate estimation of evapotranspiration(ET)is of great significance for water resource planning and desertification control in arid and semi-arid regions. In this study, the evaporation model based on the maximum entropy increase principle(maximum entropy production, MEP)and the SEBAL model are used, The net radiation(Rn), surface temperature(Ts), relative humidity(RH)and evaporative(ET)in the study area were estimated to verify the surface parameters and ET using the measured data and combining with Landsat8 and meteorological data, and the MEP model and SEBAL model were compared and analyzed. The temporal and spatial changes of surface parameters and evaporative(ET)and the influencing factors of ET under different land cover types were analyzed by combining with the land cover types in the study area. the following conclusions were drawn as follows.(1)The estimated values of surface parameters and ET in the study area fit well with the measured values. The results show that MEP model and SEBAL model can provide reasonable ET estimation for semi-arid areas.(2)Compared with SEBAL model and MEP model, it is found that there is little difference in spring and great difference in summer, which is mainly concentrated in dune land.(3)The temporal and spatial distribution of ET shows an upward trend from May to June and remains high from July to early August. It shows a significant downward trend from September to October, ET is higher in lake, followed by farmland and meadow, ET of sand dunes is the lowest. The main factors affecting the spatial distribution of ET are soil type, soil water content and vegetation status.