Analysis on evolution trend and influence factors of rocky desertification in Guangxi
AN Guoying1, LEI Yingping2, WEN Jing1, ZHOU Xuan3, TONG Liqiang1
1. China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing 100083, China; 2. 204 Geological Team of Guangxi Zhuang Autonomous Region, Hezhou 542800, China; 3. School of Economics and Management, North University of China, Taiyuan 030051, China
Abstract：Guangxi Zhuang Autonomous Region is one of the more serious provinces of rocky desertification in China, and monitoring rocky desertification development and governing the environment is a long-term task. In this paper, the distribution and evolution of rocky desertification spanning nearly 10 years from 1999 to 2008 in Guangxi were analyzed by using the results of the national eco-environmental remote sensing survey and monitoring projects, and the relevance between rocky desertification change and improvement measures as well as socio-economic development were discussed. The results show that, the area of rocky desertification in Guangxi is 1.703×104km2by the end of 2008, which covers 7% of the total region and 20.85% of the area of the carbonate rocks. And the low, moderate and severe extent of rocky desertification areas are accounted for 58.70% , 29.02% and 12.28% of the total desertification area respectively. The low and moderate extent of rocky desertification are the dominant. The decreased area of rocky desertification was decreasing 1.026×104 km2 during nine years, with average annual reduction of 0.114×104 km2 and average annual growth rate of negative 5.10%. The general trend of desertification is good, which the overall area of rocky desertification is reduced, and the extent is relieved. The transformation trend of the rocky desertification is closely related to the implementation of environmental protection policies, the changes of the industrial economic structure and the growth of the average income. And the measures, such as returning farmland to forests, agricultural population transfer, variation of peasant household income as well as promotion of household gas stoves, have achieved good results in slow down the development of rock desertification . However, there are serious difficulties in governing the rocky desertification in Guangxi caused by the restrict of geological background, natural environment and population factors. So these tasks above are very arduous for a long time.
2016, Vol. 3 
