Where are the rocky desertification mainly distributed?

Rocky desertification is mainly distributed in limestone areas.

Rocky desertification mostly occurs in limestone areas. Due to human activities, natural vegetation has been continuously destroyed, and large-scale steep slope reclamation has led to bare surface. In addition, the karst mountain area has thin soil layer, exposed bedrock and strong rainstorm scouring ability. After a lot of soil erosion, the rocks are gradually exposed, thus showing the phenomenon of rocky desertification.

Rocky desertification refers to the phenomenon of surface soil loss and bedrock exposure, land loss of agricultural use value and ecological environment degradation caused by soil erosion. In China, it is mainly distributed in the karst landform distribution area of Yunnan-Guizhou Plateau. Due to the emergence of rocky desertification, a large number of concentrated contiguous poverty-stricken areas have also appeared in this area.

harm

Mountain torrents, landslides and mudslides are prone to occur in rocky desertification areas, and the development of underground karst leads to frequent floods and droughts, which are accompanied by droughts and floods almost all the year round. At the same time, the rocky desertification mountain area has high rock exposure rate, less soil, low water storage capacity and strong water leakage, which is easy to lead to water shortage and drought, and heavy rain will lead to serious soil erosion. Due to serious soil erosion, most areas in southwest China are short of soil, and some places still have engineering water shortage.

Rocky desertification and serious soil erosion have formed a vicious circle, which not only worsens agricultural production conditions and ecological environment, but also makes people lose their basic living conditions, so many places have to consider ecological migration.