基于Landsat 8影像的民权湿地时空动态变化研究

Temporal and Spatial Dynamic Change of Wetland in Minquan County Based on Satellite Image

民权黄河故道国家湿地公园是河南省的重要湿地资源,且生态景观资源与动植物资源丰富。为了检验公园2014-2020年建设成果,本研究基于层次分类法,对研究区2013-2020年5期Landsat 8遥感影像进行分类处理,得到了不同时期的湿地资源分布情况;根据动态度模型与马尔可夫模型进行时空动态变化分析;结合其变化驱动因子,为湿地的治理与恢复提供一定依据。结果表明,研究区地类变化主要受人为因素影响,变化速度较慢,整体呈现出湿地内部相互转化及湿地与非湿地相互转化并存的特点。应该合理管理水产养殖产业,控制养殖池塘面积,合理处理废弃养殖场,降低对生态环境的影响;继续推进湿地修复工作,使各个分区协调发展。

The National Wetland Park of the Old Yellow River is an important wetland resource in Henan Province,and it is rich in ecological landscape resources and animal and plant resources.In order to test the construction results of the park from 2014 to 2020,this study classified the Landsat 8 remote sensing images of five periods from 2013 to 2020 based on the hierarchical classification method,and obtained the distribution of wetland resources in different periods.Spatio-temporal dynamic changes were analyzed according to the dynamic attitude model and Markov model;combined with its change driving factors,it provides certain basis for wetland governance and restoration.The results show that the change of regional types in the study area is mainly affected by human factors,and the change speed is relatively slow,showing the characteristics of mutual transformation within wetlands and mutual transformation between wetlands and non-wetlands.The aquaculture industry should be managed reasonably,the area of aquaculture ponds should be controlled,and the abandoned farms should be treated reasonably to reduce the impact on the ecological environment.Continue to promote wetland restoration work,so that the coordinated development of each district.