Analysis of Temporal and Spatial Evolution of Rocky Desertification Sensitivity in Tongren, Guizhou Province
| Autor: | Jiaxue Ren, Dan Meng, Haitao Chen |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 780:042058 |
| ISSN: | 1757-899X 1757-8981 |
| DOI: | 10.1088/1757-899x/780/4/042058 |
| Popis: | Based on the image data of Tongren in 1996, 2003, 2011 and 2017, spatial analysis and mathematical statistics were used to analyse the spatial and temporal evolution of the rocky desertification sensitivity in Tongren in the past 20 years. Combining the current status of rocky desertification sensitivity, grading sensitive regions and proposing corresponding treatment suggestions. The results showed that: (1) The sensitivity of rocky desertification in the western regions was relatively high. From 1996 to 2017, the slightly and moderately sensitive areas increased first and then decreased. It can be seen that low sensitivity regions has achieved remarkable improvement in recent years; while the areas of highly sensitive and extremely sensitive decreased first and then increased, whose regulation need to be strengthened .(2) The trend of rocky desertification sensitivity of some regions has improved while the others has deteriorated to some extent. The area of slight improvement and slight deterioration is the largest, which meant the governance is occurring while the destruction phenomenon still exists. The sensitive and insensitive conversion areas are small, while the different degree of sensitivity are relatively large. (3) The prevention and control of the karst regions in Tongren is divided into three levels, the area of level 1 to 3 is 5539.14km2, 3450.89km2and 2879.37km2respectively, aim to each level we proposed corresponding measures to guide the restoration of rocky desertification in the southwest karst area. |
| Databáze: | OpenAIRE |
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