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Volume 43 Issue 6
Dec.  2024
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Article Navigation >  CARSOLOGICA SINICA  > 2024  >  43(6): 1445-1458
YANG Fengji, HE Xiang, CHEN Chaowen, WANG Jinman, ZHOU Zhiping, ZHANG Hua, LIU Biao. Research on water conservation in karst graben basin from the perspective of ecological restoration of territory space: A case study of the Erhai lake basin[J]. CARSOLOGICA SINICA, 2024, 43(6): 1445-1458. doi: 10.11932/karst20240620
Citation: YANG Fengji, HE Xiang, CHEN Chaowen, WANG Jinman, ZHOU Zhiping, ZHANG Hua, LIU Biao. Research on water conservation in karst graben basin from the perspective of ecological restoration of territory space: A case study of the Erhai lake basin[J]. CARSOLOGICA SINICA, 2024, 43(6): 1445-1458. doi: 10.11932/karst20240620
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Research on water conservation in karst graben basin from the perspective of ecological restoration of territory space: A case study of the Erhai lake basin

doi: 10.11932/karst20240620
  • 1.

    Yunnan Gold and Mining Group Co., Ltd., Kunming, Yunnan 650299, China

  • 2.

    School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China

  • 3.

    Key Laboratory of Land Consolidation and Rehabilitation, Ministry of Natural Resources, Beijing 100035, China

  • 4.

    Yunnan Geology and Mineral Engineering Investigation Group Co., Ltd., Kunming, Yunnan 650051, China

  • 5.

    Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area, Kunming, Yunnan 650216, China

  • Received Date: 2024-02-02
    Available Online: 2025-03-21
    Abstract
  • The Erhai lake basin is an important ecological area outlined in the "14th Five-Year Plan" and the Master Plan on Major Projects for the Conservation and Restoration of National Key Ecosystems (2021–2035). The water conservation function in the Erhai lake basin plays a crucial role in maintaining the balance of water resources and ecology. To formulate effective protection and restoration strategies, methods such as ANUSPLIN meteorological interpolation, regional hydrogeological assessment, and InVEST water yield calculation have been employed to evaluate and predict the water yield and water conservation function of the Erhai lake basin.The research conclusions are as follows, (1) Through hydrological and geological assessments, it is confirmed that the Erhai basin constitutes a relatively complete hydrogeological unit. Influenced by climate change and land use, there was a 3.6% increase in water yield in 2022 compared to 2006, alongside a 1.65% decrease in water conservation. The areas with high water conservation rates are mainly located in the Cangshan mountain and northern mountainous regions, with an average water conservation rate exceeding 10%. In contrast, the areas with low water conservation rates are primarily found in the garben basin region, where the average water conservation rate is only 2.89%. (2) The prediction results indicate that, due to the decrease of precipitation, both the natural inertia development scenario and the ecological protection and restoration scenario will experience a decline in water source conservation. However, the reduction in water conservation under the ecological restoration scenario is significantly lower than that under the natural inertia development scenario, and the water conservation rate in ecological restoration has increased. There is a risk of local degradation in the natural inertia development scenario, while the ecological protection and restoration scenario can enhance the water conservation capacity through measures, and reduce the risk of degradation. (3)The spatial and temporal distribution of water conservation in the Erhai lake basin is closely related to natural factors such as climate and land use structure. In response to the degradation of water conservation function in the Erhai lake basin, existing sub-projects were studied and evaluated.Special attention was given to the northern Cangshan range and southeastern mountainous area, where measures such as ecological status assessment, and engineering water supplement were proposed to enhance water conservation, maintain ecosystem stability, and promote sustainable development.

     

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