四川德阳合兴场气田投产前后周围土地覆盖变化研究

选取四川德阳合兴场气田周围1988年和2000年遥感影像进行土地覆盖变化分析，绘制出气田投产前后的土地利用图.通过ArcView的FRAGSTATS模块，计算出土地覆盖变化值和景观格局分析指标，对气田周围土地利用变化和空间景观结构变化进行研究.研究结果表明:四川德阳合兴场气田投产前后对周围土地覆盖影响不大，气田建设前后主要的土地利用类型均为耕地，建设用地变化最为明显，从1988年的166.68 km²增加到2000年的235.63 km².但在1988～2000年间，景观空间格局呈现破碎化、多样化发展，说明气田开发对景观格局还是产生了一定的影响.

RS-GIS-based Analysis of Land Cover Change in the Region of Hexingchang Gas Field in Sichuan Compared with Construction

According to 1988 and 2000 TM image of the surrounding region of Hexingchang gas mass in the basin of Sichuan Province, land cover change between before and after its construction was analyzed and two land use maps were made respectively. FRAGSTATS calculation method was used to analyze six representative quantitative indices of the landscape spatial structure and heterogeneity. Result showed that land cover in the region surrounding Hexingchang gas mass was moderately influenced by the construction. The main type of land use is crop field before and after the gas mass construction. and construct land is changed obviously, from 166.68 km^2 in 1988 to 235.63 km^2 in 2000. The analysis of landscape spatial structure and landscape heterogeneity showed that ,landscape spatial pattern in the region has tended to become fragmented and diversified, which indicated that the construction of the gas mass may have had other important effects on land pattern.