Global analysis of land-use changes in karst areas and the implications for water resources
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Karst areas contain valuable groundwater resources and high biodiversity, but are particularly vulnerable to climate change and human impacts. Land-use change is the cause and consequence of global environmental change. The releases of the Climate Change Initiative-Land Cover (CCI-LC) and World Karst Aquifer Map (WOKAM) datasets have made it possible to explore global land-use changes in karst areas. This paper firstly analyses the global karst land-use distribution in 2020, as well as the land-use transition characteristics between 1992 and 2020. Then, two indicators, proportion of land-use change and dominant type of land-use change, are proposed to identify the spatial characteristics of land-use change in global karst areas. Finally, three examples of land-use change in karst areas are analyzed in detail. Land-use types and proportions of the global karst areas from large to small are as follows: forest (31.78%), bare area (27.58%), cropland (19.02%), grassland (10.87%), shrubland (7.21%), wetland (1.67%), ice and snow (1.16%) and urban (0.71%). The total area of global karst land-use change is 1.30 million km2, about 4.85% of global karst surface. The land-use change trend of global karst is dominated by afforestation, supplemented by scattered urbanization and agricultural reclamation. The tropical climate has a higher intensity of land-use change. Regions of agricultural reclamation are highly consistent with the population density. These results reflect the impact of human activities and climate change on land-use changes in global karst areas, and serve as a basis for further research and planning of land resource management.
Details
Original language | English |
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Pages (from-to) | 1197-1208 |
Number of pages | 12 |
Journal | Hydrogeology journal |
Volume | 31 |
Issue number | 5 |
Early online date | 23 Jun 2023 |
Publication status | E-pub ahead of print - 23 Jun 2023 |
Peer-reviewed | Yes |
External IDs
WOS | 001014679100001 |
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ORCID | /0000-0003-0076-7079/work/145695579 |
Keywords
Sustainable Development Goals
ASJC Scopus subject areas
Keywords
- Anthropogenic use, Global mapping, Karst, Land-use change, Satellite imagery