现代烟草农业基地单元工程配置对石漠化的影响

Influence of Engineering Configuration of Modern Karst Tobacco Agriculture Base Unit on Rocky Desertification

贵州的现代烟草农业基地单元的工程建设背景受到喀斯特背景制约,为研究人为干预下工程的建设对石漠化变化的影响,针对石漠化综合防治展开工程配置。在RS和GIS技术的支持下,以2008年和2011年高分辨率影像为数据源,提取清镇市现代烟草农业基地单元石漠化变化信息,以石漠化转移矩阵为基础,分析工程实施前后工程治理不同阶段治理区石漠化变化特征。通过定量分析可知,无石漠化具有最大的总变化量,轻度石漠化主要表现为数量的增加。潜在石漠化和中度石漠化新增量大于流失量,强度石漠化、极强度石漠化的流失量大于新增量。结果表明,经过工程治理监测时段内石漠化面积呈现减少态势,两个时期年变化是从强度石漠化往轻度石漠化增加,石漠化恶化趋势已经得到初步遏制,工程治理初见成效。

The engineering construction of modern tobacco agriculture base unit is restricted by karst background. This article aims to study the influence of human interventional construction projects on rocky desertification and develop project configuration towards rocky desertification control. Using RS and GIS technology and taking the high resolution satellite images of 2008 and 2011 as data source, extracted the change information of rocky desertification in Qingzhen city modern tobacco base unit.Based on the transfer matrix, change features of the controlled region at different stages of environmental controlled were analyzed. Through quantitative analysis, no rocky desertification area has the largest changes in total amount, mild desertification area mainly increase in numbers. New increment of potential rocky desertification and moderate rocky desertification area was larger than the loss. The loss of intenserock desertification and extremely intense rocky desertification appears was more than the new increment. The results show that： after the engineering treatment rocky desertification area in the monitoring period decreased, annual change in the two periods is from the intense rocky desertification mild rocky desertification. Deterioration trend of rocky desertification has been initially contained, and the engineering management has achieved initial success.