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Solid Earth An interactive open-access journal of the European Geosciences Union
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Volume 5, issue 2
Solid Earth, 5, 1329–1340, 2014
https://doi.org/10.5194/se-5-1329-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Solid Earth, 5, 1329–1340, 2014
https://doi.org/10.5194/se-5-1329-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.

Research article 16 Dec 2014

Research article | 16 Dec 2014

Characterization and interaction of driving factors in karst rocky desertification: a case study from Changshun, China

E. Q. Xu1,2 and H. Q. Zhang1 E. Q. Xu and H. Q. Zhang
  • 1Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, PR China
  • 2University of Chinese Academy of Sciences, Beijing 100049, PR China

Abstract. As the most severe ecological issue in southwest China, karst rocky desertification (KRD) has both threatened and constrained regional sustainable development. Comprehensively understanding the relationship between the evolution of KRD and relevant driving data would provide more information to combat KRD in such complex karst environments. Past studies have been limited in quantifying the relative importance of driving factors influencing fine-scale KRD evolution, and have also lacked insight into their interactive impacts. To address these issues, we have used geographical information system techniques and a geographical detector model to explore the spatial consistency of driving factors and their interactions in relation to the evolution of KRD. Changshun County in China was selected as a representative area for the study. Nine relevant driving factors, including both natural and anthropogenic factors, were studied in regard to their relationships with KRD transformation between 2000 and 2010. Our results demonstrate the relative importance of driving data in influencing the improvement and deterioration of KRD. Lithology, soil type and road influence are identified as the leading factors. Interestingly, to our study at least, there is no significant difference between the impacts of natural and anthropogenic factors influencing KRD improvement, and even natural factors have a higher impact on KRD deterioration. Factors were found to enhance the influence of each other for KRD transformation. In particular, the results show a non-linearly enhanced effect between driving factors, which significantly aggravates KRD. New information found in our study helps to effectively control and restore areas afflicted by KRD.

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Geographical information system techniques and a geographical-detector model are used to explore the relationship between the evolution of karst rocky desertification (KRD) and driving data. Our results detect non-linearly enhanced impacts significantly aggravating the KRD. This implies that there is no significant difference between natural and anthropogenic factors influencing KRD improvement, and also that natural factors have a more important impact on KRD deterioration.
Geographical information system techniques and a geographical-detector model are used to explore...
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