Adaptive change of land use to nature and society in China’s agro-pastoral ecotone

Geng, Xin; Hu, Shi; Wang, Xunming; Dan, Cai; Gong, Yuan

doi:10.1016/j.landusepol.2023.106554

Cited by 6 publications

(1 citation statement)

References 75 publications

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“…This is related to the densely population in the region (Figure 1e). Under the disturbance of frequent agricultural activities, LUCC conversions can significantly alter the hydrologic processes and surface characteristics of the basin (Geng et al, 2023). The unique geological conditions in karst areas result in slow rate of soil formation, taking 2000–3000 years or even longer to form a 1 cm thick soil layer (Zhang, Huang, et al, 2019; Zhang, Li, et al, 2019).…”

Section: Discussionmentioning

confidence: 99%

Mediation effects of vegetation, land use and cover change and karst characteristics on hydrologic processes in heterogeneous karst basins

Wu,

Li,

Xiao

et al. 2024

Hydrological Processes

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A thorough understanding of the complex response of hydrologic processes to latent factors is of great significance for regional soil erosion and water resources management. However, what kind of mediation effect exists between hydrologic processes and latent factors is not yet clear, especially in heterogeneous karst regions. In this study, the elasticity coefficient method and partial least squares structural equation modelling (PLS‐SEM) were used to investigate the mechanism of latent factors on hydrologic processes in karst basins and to explore the mediation effect between latent factors and hydrologic processes. The results show that the runoff of Yeji River Basin decreased during 1997–2004, but increased or stabilized since 2005. On the monthly scale, the runoff in July and December showed an ‘inverted V‐shaped’ change. Both elasticity coefficient method and PLS‐SEM showed that climate change contributed the most to runoff (direct effect accounted for 37.94% ~ 61.41%). In PLS‐SEM, the total effect sizes of latent factors on runoff were as follows: climate change (0.751 ~ 0.963) > vegetation (0.296 ~ 0.740) > karst characteristics factors (KCF) (−0.454 ~ −0.563) > human activities (−0.036 ~ −0.528) > land use and cover change (LUCC) (−0.036 ~ −0.205). In the typical karst basin, two mediation pathways have been determined: human activities‐vegetation/LUCC‐runoff, where vegetation and LUCC had a mediation effect of relationships between human activities and runoff; climate change‐KCF‐runoff, where KCF had a mediation effect of relationships between climate change and runoff. Moreover, PLS‐SEM is a preferred method to decouple the complex responses of hydrologic processes in heterogeneous karst basins to climate change and human activities than the elasticity coefficient method. This study conducted further research and exploration on the mechanism of hydrologic processes in heterogeneous karst basins, and provided valuable theoretical references for grassroots water managers to cope with water resources management under the context of future climate change.

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Section: Discussionmentioning

confidence: 99%