The wetland evolution process and ecological effect analysis in coal-mining subsided land with high groundwater

摘要

Human mining activities are closely related to the occurring conditions of water resources,land use/cover change and the ecological environment.In a high groundwater area,coal mining activities will cause the surface subsidence and lead to groundwater and due to the changes of hydrodynamic conditions from the original land ecological environment of mining area in succession to aquatic-terrestrial complex environment.Large areas of annual and seasonal water areas have many unique wetland characteristics such as hydrology,soil and biological diversity.The wetlands in high groundwater mining subsidence areas have their own evolution characteristics.These characteristics mainly perform landscape pattern and landscape change process in the interaction of temporal and spatial scales.This evolution has influence on energy flow of the ecological system in the mining area,material circulation and species migration.And it has a significant environmental effect on maintaining regional ecological system balance,biological diversity,increasing carbon sink,etc.