威宁县石漠化不同阶段动态演变特征研究

Study on Dynamic Evolution Characteristics of Rocky Desertification in Weining County at Different Stages

不同时期石漠化的变化存在一定差异,2011—2021年间全县石漠化面积减少了470.14 km^(2),2011—2016年间石漠化减少面积小于2016—2021年间的339.08 km^(2),石漠化年变化率从-2.86%增长至-8.65%,石漠化减少趋势加快。轻度石漠化是内部变化面积最大的类型,各种类型石漠化主要转出到了无石漠化,治理工程对石漠化改善起到一定成效,但各石漠化等级内部转换反复,仍需关注其变化趋势。

There are certain differences in the changes of rocky desertification in different periods.The area of rocky desertification in the whole county decreased by 470.14 km^(2) from 2011 to 2021,The reduced area of rocky desertification from 2011 to 2016 is less than 339.08 km^(2) from 2016 to 2021.The annual change rate of rocky desertification increased from-2.86%to-8.65%,and the trend of rocky desertification reduction accelerated.Mild rocky desertification is the type with the largest internal change area.Various types of rocky desertification are mainly transferred to non-rocky desertification.The control project has played a certain role in the improvement of rocky desertification.However,the internal conversion of various rocky desertification grades is repeated,and the change trend still needs to be paid attention to.The research can provide scientific reference for the scientific prevention and control of rocky desertification in Weining County,Guizhou and other rocky desertification areas.