SCIENTIA GEOGRAPHICA SINICA ›› 2023, Vol. 43 ›› Issue (3): 423-433.doi: 10.13249/j.cnki.sgs.2023.03.005

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Ecological risk identification and management based on ecosystem service supply and demand relationship in the Bailongjiang River Watershed of Gansu Province

Zhu Yuehua(), Hou Zongdong, Xu Caixian, Gong Jie()   

  1. College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 730000, Gansu, China
  • Received:2022-04-26 Revised:2022-07-18 Online:2023-03-30 Published:2023-03-20
  • Supported by:
    National Natural Science Foundation of China(42171090);Second Tibetan Plateau Scientific Expedition and Research Program(2019QZKK0603)


Risk identification of ecosystem services (ESs) supply and demand are essential for optimizing ESs management. However, few studies focused on balancing ESs supply and demand in complex mountainous areas. In this study, InVEST model, supply-demand ratio coordination degree model, and spatial autocorrelation were used to quantitatively evaluate the supply-demand matching relationship of typical ecosystem services in Bailongjiang River Watershed in Gansu Province. Based on the identification of supply-demand risk, ecological management zones were delineated, and targeted management strategies were proposed. The results show that: 1) From 2002 to 2018, only the total food demand showed a decreasing trend, while the total supply of food, the entire supply and demand of water conservation, and soil conservation showed an increasing trend. In terms of quantity matching between supply and demand, only the whole food supply in 2002 and 2010 was less than the total demand, and the other services showed a surplus. 2) As to the spatial matching type of supply and demand, the dominant type of water conservation was high supply with low demand. The soil conservation was high supply with high demand and low supply with low demand, and food provision service was low supply with low demand. 3) Water conservation services' supply and demand risks are concentrated in the densely populated areas east of the Zhouqu-Wudu section of Bailongjiang River. The supply and demand risks of soil conservation services are mainly in the mountainous areas in the north of Diebu, the east of Dangchang, and most of Wudu and the risk areas of food production supply and demand are concentrated in the east of the watershed and the north of Zhouqu. 4) The BLJW can be divided into five levels of supply and demand risk areas according to the relationship between the supply and demand of the ecosystem. This study proposed an integrated management framework for the balanced spatial allocation of ecological and environmental resources, thus providing a new perspective and approach for enhancing ecosystem services and high-quality regional development.

Key words: ecosystem services, supply and demand relationship, spatial match, ecological zoning, watershed ecological management, the Bailongjiang River Watershed in Gansu

CLC Number: 

  • X321