[1]JING Juanli,WANG Yongfeng.Evolution Characteristics of Karst Rocky Desertification in Guangxi Based on MODIS NDVI[J].Research of Soil and Water Conservation,2015,22(02):123-128,135.
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Evolution Characteristics of Karst Rocky Desertification in Guangxi Based on MODIS NDVI
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
22
Number of periods:
2015 02
Page number:
123-128,135
Column:
Public date:
2015-04-28
- Title:
- Evolution Characteristics of Karst Rocky Desertification in Guangxi Based on MODIS NDVI
- CLC:
- X171;X87
- DOI:
- -
- Abstract:
- In order to understand the evolution characteristics of karst rocky desertification in Guangxi, MODIS NDVI data of 2000, 2004, 2008 and 2012 were selected to estimate vegetation coverage in the study area by combining the data of land use with soil data of study area and using the dimidiate pixel model based on NDVI; the rocky desertification information of different phase in the study area were derived, the evolution characteristics and track were analyzed according to the corresponding relationship between rocky desertification and vegetation coverage. Relationships between karst rocky desertification and environmental background, climate, social-economic and rocky desertification control policy factors were discussed, respectively. The result showed that: 1) the overall trend of rocky desertification was rapidly reducing first and then recovering slightly in the study area from 2000 to 2012, improvement was compatible with deterioration，mild rocky desertification had the fastest change rate, dynamic degree was 3.73%; 2) during the 13 years, the improved type accounted for 11.60% of the total karst area, repeated type accounted for 9.54%, deteriorated type accounted for 3.69%, rocky desertification area of not variant type occupied only 1.59%，improved area was greater than the degraded area; 3) karst rocky desertification evolution was mutually influenced by the factors such as environmental background, climate, social-economic and rocky desertification control policy.
- References:
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