石漠化斑块动态行为特征与分类评价

doi:10.11820/dlkxjz.2010.03.012

Abstract

Abstract:

It is beneficial to probe into the characteristics of karst rocky desertification land for the taming of different types of lands with karst rocky desertification (KRD) problems and the ecological restoration and reconstruction of lands with rocky desertification. Remotely sensing data such as SPOT 5 images (resolution at 2.5 m) and aerial images (scale: 1∶50000), integrating with the field and household investigation, were used to carry out a study on patch evolution types of KRD from 1973 to 2005 in Boluo catchments of Qingzhen, Guizhou Province, a typical karst area in Southwest China. Three evolution types of KRD patches, i. e., newly generated, expanding, dissolved and not changed were distinguished. The results show that the mutual transformation of slight KRD to moderate KRD, strong KRD and extremely strong KRD was extremely remarkable during the period 1973-2005, demonstrating that the KRD patches had been in a unstable fluctuation status. However, there were some evolutions from no KRD patches to the high rank of KRD patches according to the origin of patches. The karst rocky desertification land in the study area could be classified into unchanged KRD, newly generated KRD and expanding KRD, from the viewpoint of dynamic behavior characteristics of patches, furthermore, the intensity index of KRD and some suggestions to prevent and tame KRD were put forward.

Key words: assessment, classification, karst rocky desertification, patch dynamic

LI Yangbing1, LI Weihai1, WANG Shijie2, LUO Guangjie1, CHENG Anyun2 . Dynamic Behavior Characteristics and Classification Assessment of Karst Rocky Desertification[J].PROGRESS IN GEOGRAPHY, 2010, 29(3): 335-341.

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Dynamic Behavior Characteristics and Classification Assessment of Karst Rocky Desertification

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