[1]Wang Yinlong,Gao Ruizhong,Fang Lijing,et al.Spatial-Temporal Evolution and Driving Factors of Hydrological Cycle Factors in Inland River Basin of Inner Mongolia Gassland[J].Research of Soil and Water Conservation,2024,31(05):279-287.[doi:10.13869/j.cnki.rswc.2024.05.009]
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
31
Number of periods:
2024 05
Page number:
279-287
Column:
Public date:
2024-08-10
- Title:
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Spatial-Temporal Evolution and Driving Factors of Hydrological Cycle Factors in Inland River Basin of Inner Mongolia Gassland
- Author(s):
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Wang Yinlong1, Gao Ruizhong1, Fang Lijing1, Zhang Xu1, Li Baoqun2
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(1.College of water conservancy and civil engineering, Inner Mongolia agricultural university, Hohhot, Inner Mongolia 010018, China; 2.Xilin Gol hydrology and water resources branch center, Xilinhot, Inner Mongolia 026099, China)
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- Keywords:
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grassland inland river basin; climate change; vegetation dynamics; hydrological response; trend analysis
- CLC:
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P339
- DOI:
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10.13869/j.cnki.rswc.2024.05.009
- Abstract:
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[Objective]The aim of this study is to examine the response of hydrological cycle factors to vegetation dynamics and climate change in the inland river basin of Inner Mongolia grassland, which is of important theoretical significance for the ecological protection and regional water resources development and utilization in the inland river basin of Inner Mongolia grassland. [Methods]The inland river basin of Inner Mongolia grassland was taken as the research area. Based on multi-source remote sensing, climate, meteorology, hydrology and other data, the temporal and spatial evolution and driving factors of hydrological cycle elements in the basin were analyzed by trend test, significance test and correlation analysis. [Results](1)The evapotranspiration of the basin showed a significant upward trend( 0.994 mm/a ), the precipitation showed a significant downward trend( 1.965 mm/a ), and the soil moisture showed an increasing trend.(2)The vegetation in the growing season generally showed an increasing trend. The normalized difference vegetation index(NDVI), gross primary productivity(GPP)and leaf area index(LAI)showed a ladder-like spatial distribution pattern of high level in the east and low level in the west, and the temperature showed an overall upward trend.(3)Vegetation change was positively correlated with evapotranspiration(ET)and soil moisture(SSM). There was a significant positive correlation between temperature and evapotranspiration(R=0.699, p=0.01 ), and the spatial correlation increased from west to east. There was a negative correlation between temperature and runoff, and a significant negative correlation with soil moisture in the east and west of the basin. [Conclusion]The hydrological cycle variables(precipitation, evapotranspiration, soil moisture, runoff)increased with the increase of vegetation. Precipitation, soil moisture and runoff decreased with the increase of temperature, and evapotranspiration increased with the increase of temperature.