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Geoscience ›› 2024, Vol. 38 ›› Issue (03): 624-635.DOI: 10.19657/j.geoscience.1000-8527.2024.038

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Spatiotemporal Variations of Water Yields in the Yunnan-Guizhou Plateau Based on InVEST and PLUS Models

GUO Jiahui1,2,3(), LIU Xiaohuang2,4(), ZHANG Wenbo2,4, YANG Chaolei3,5, WANG Ran2,4, LUO Xinping2,4, XING Liyuan2,4, WANG Chao4, ZHAO Honghui4   

  1. 1. College of Geography and Remote Sensing Sciences, Xinjiang University, Urumqi, Xinjiang 830017, China
    2. Key Laboratory of Natural Resource Coupling Process and Effects Ministry of Natural Resources, Beijing 100055, China
    3. Yunnan Province Field Science Observation and Research Station on the Evolution of Soil and Water Resources and the Carbon Sequestration Enhancement Effects in the Alpine Gorge Area of the Jinsha River, Chuxiong,Yunnan 651400, China
    4. Command Center of Natural Resource Comprehensive Survey, China Geological Survey, Beijing 100055, China
    5. Kunming General Survey of Natural Resources Center, China Geological Survey,Kunming, Yunnan 650111, China
  • Online:2024-06-10 Published:2024-07-04

Abstract:

Quantitative assessment on the water production in Yunnan-Guizhou Plateau is essential to investigate the dynamic changes of water resources and to maintain the ecological security and balance in this region.This is of great practical significance for maintaining urban water conservation as well.In this study, PLUS model was used to predict the land-use types in the region from the year of 2025 to 2030, and InVEST model was used to qua.pngy the water yields from the year of 2000 to 2030 (every five years), with analyzing it in spatio-temporal perspective.We therefore analyzed the changes in the water yield of different land-use types and the changes in the water yields under different slope classes.Meanwhile, a geographical detector were used to analyze the driving forces of water yields of different land-use types.The results show that (1) the total amount of water produced in the region from 2000 to 2030 shows a trend of “decreasing-raising-decreasing-raising” with the total amount of water produced as 7.818×107 m3, 5.750×107 m3, 4.700×107 m3, 9.162×107 m3, 7.498×107 m3, 7.820×107 m3, and 8.999×107 m3, respectively.The spatial distribution of water production shows the characteristics of high in the southeast and the north, and low in the middle areas.(2) Unutilized land is the land type with the highest water production in the region.(3) Changes in the meteorological factors are the main reason causing the changes in the annual water production in the Yunnan-Guizhou Plateau.The analysis of geographical detector shows that the precipitation and evapotranspiration have a strong explanatory power for water yields, and the interactions between precipitation and land-use has the strongest explanatory power for the changes of water yield.The water yield is mainly concentrated in the area with slope gradient of ~0°-5°, which accounts for 43.80% of the total water yield.The results of this study provide scie.pngic references for the dynamic assessment, effective management, and sustainable development of water resources in the Yunnan-Guizhou Plateau.

Key words: water yield, InVEST model, PLUS model, Yunnan-Guizhou Plateau, geographical detector, spatiotemporal characteristics

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