观音坪电站工程评价区景观格局预测分析

以湖北省宣恩县酉水流域观音坪水电工程生态完整性评价报告为基础,采用卫星遥感图片分析,运用GIS技术,完成土地利用结构和景观格局图。通过对工程建成前后各种土地类型的优势度值的变化分析得出:工程建设中会造成林草地减少约3.45hm2,优势度由原来的58.30%下降到57.41%,仅下降0.89%;林地和耕地也分别减少约7.20 hm2和0.84 hm2,优势度下降3.87%和1.92%;而水域增加10.82 hm2,优势度上升1.73%,但是它们之间的比例关系基本与工程建设前的比例相当,草地仍然是景观生态体系中的模地。工程建设后当地景观生态体系不会有很大变化。

Prediction Analysis of Land Utilization and Landscape Pattern for Project Zone of a Hydropower Station

Based on investigation on the existing status of eco-environment for a hydropower station zone in Xuan'en County, Hubei Province, the change of different land types and landscape patterns were analysed by GIS. Results showed that the project construction would cause reduction of forest and grassland by 3.45hm2 and with dominant degree drop from 58.30% to 57.41%. The forest and farmland will reduce by 7.20hm2 and 0.84hm2, with dominant degree drop by 3.87% and 1.92% respectively. And water areas will increase nearly 10.82hm2, with dominant degree rising by 1.73%, which is equal to the proportion before the project construction, with grassland remaining the main ground in landscape ecosystem. Local landscape ecosystem would not have great change after the project construction.