坡度因子对喀斯特石漠化的影响

为了探索广西喀斯特石漠化的成因,选取地形因子中的坡度,对研究区遥感影像进行处理和石漠化信息分级,借助GIS技术进行定性、定量分析,结合GPS技术进行实地抽样调查,评价试验精度。结果表明:随坡度的增大,石漠化灾害程度有上升的趋势,但是当坡度25°时,人类活动影响的变小,石漠化的整体发生率有所降低。石漠化主要受到自然因素的影响,但人类对生态的破坏活动会加剧石漠化的进程。

Effects of slope factors on karst rocky desertification

In order to explore the genesis of karst rocky desertification in Guangxi, we selected a terrain factor of slope to process the remote sensing images in the study area and to grade the rocky desertification information. Furthermore, with the aid of the GIS technology for qualitative and quantitative analysis, we conducted field sampling investigation with GPS technology to evaluate the test accuracy. The result shows that with the increase of slope, the degree of rock desertification disasters displays an increasing trend. When the slope is greater than 25°, as the impact of human life activity becomes small, the overall incidence of rocky desertification decreased. Rocky desertification is mainly affected by natural factors, but human activity is an important factor the development of rocky desertification.