摘要
以辽宁蒲石河流域新建成的蒲石河抽水蓄能电站及其下游区域为研究地点,基于2003年和2013年两期ETM遥感数据,采用RS和GIS技术分析了10年间本区域土地的利用变化,并结合景观生态研究方法,计算了斑块数、斑块密度、最大斑块指数、景观形状指数、多样性指数、均匀度指数、优势度指数等景观指数,对该区域景观格局状态进行了评价,旨在明确抽水蓄能电站工程建设对区域生态环境的影响程度.结果表明:森林景观在工程建设前后均为整个区域的主体景观,面积所占比例分别达到84.80%和80.65%;水域景观和农田建设景观均有所增加,尤其是水域景观,增加幅度为5.89%,而且多以不规则斑块的形式增加;整个研究区域景观多样性和均匀度增大.抽水蓄能电站建成后,该区域主体仍然是自然林,工程建设对区域土地利用格局的影响较小,而且建设用地呈现上升趋势.在未来的管理中要协调各种景观间的关系,并继续推进天然林保护、封山育林等工程,保证区域生态功能的有效发挥.
The change of land-use pattern of watershed could alter nature environments and ecological courses,and then lead to some effects of environment.The study was carried out in the part of Pushihe watershed,accurately where Pushihe pumped-storage power station was built and the downstream region.Based on two ETM data,classified using maximum likelihood classification and mapped the results in ARCGIS.Combined with methods of landscape ecology,calculated seven landscape metrics,such as number of patches,density of patches,largest patch indices,landscape shape indices,Shannon diversity indices,Shannon evenness indices,and landscape dominance indices and assessed the landscape pattern of the region,aiming at knowing the degrees of impacts to local ecological environment caused by pumped-storage power station.The results shows forests are still the dominat landscape of the area before and after the engineering construction,the percentage amounting for 84.80% and 80.65%respectively.Water area and farming-constructing landscapes are slightly increasing,especially the ratio of water area increasing by 5.89%,more in irregular patch style.The diversity and evenness of the wold landscape are enhancing.In a word,the dominance of the area is nature forest,and the influence of the station project is relatively weak to local landscape pattern.However,the percent of constrction area is appearing an increasing trend so that should coordinate the development of landscape in the future management.Have to continue to promote such projects as nature forest protection and closing hillsides for forest conservation in order to guarantee that the ecological functions take effect efficiently.
出处
《东北师大学报（自然科学版）》
CAS
CSCD
北大核心
2015年第4期137-142,共6页
Journal of Northeast Normal University(Natural Science Edition)
基金
国家环保部公益性行业重大专项基金资助项目(201209029)
关键词
遥感
土地利用
景观格局
景观指数
remote sensing
land use
landscape pattern
landscape metrics
