Changes And Prediction Analysis Of Wetland Structure In Xiong’an New Area

In recent years,due to the global climate change and the interference of human activities,the wetland and the ecological environment it carries have been continuously deteriorating,and the restoration and protection of the wetland is facing great challenges.The study of wetland structure evolution and type conversion plays an important role in protecting the normal structure and diversity of wetlands andforming a healthy and sustainable ecosystem.The construction of Xiongan New District is a millennium plan and a national event.The Baiyangdian wetland and river wetland are important ecological sources.Maintaining a healthy wetland structure not only has important ecological significance,but also has great economic,social and political significance.Wetlands in Xiong’an New Area mainly include Baiyangdian Wetland and Liudian River Wetland.This paper uses Landsat images,collects relevant data,and conducts field investigations.The structure of Baiyangdian Wetland is divided into structural types dominated by human activities and natural wetland structures.,Analyze the changes of wetland structure types on the spatial scale,and analyze the evolution trend of the Baiyangdian wetland structure under the multi-source water supplement scenario in the future in conjunction with relevant planning;regarding the river wetland,this article combines high-resolution images and river wetland data obtained from field measurements on the river The current situation of the wetland is analyzed,and a health evaluation system is established to evaluate the health of the river wetland.Optimization measures are proposed based on the health of the river wetland.Finally,the optimized health status is evaluated and analyzed to provide a reference for the optimization of the river wetland.The research results of the thesis show that:(1)The Baiyangdian Wetland experienced disorderly development and was established as a provincial nature reserve.The intensity of human activities first increased and then gradually weakened.The growth rate of wetland area dominated by human activities decreased from 0.39km2 per year to 0.24km2 per year.With the establishment of the Xiongan New Area,human activities have withdrawn from most areas;the water level is also an important factor affecting the structure of the Baiyangdian Wetland.When the water level is high,the Baiyangdian Wetland area dominates the natural wetland structure,and when the water level is low,the opposite is true;In the future scenario,human activities in the core area and buffer zone will all exit,and only weaker human activities exist in the experimental area.Therefore,the wetland structure of the core area and buffer zone is more inclined to changes in the near-natural state.The wetland structure of the experimental area It will change in the direction of healthier and ecology under human control.(2)Through the evaluation and analysis of the health status of the river wetland,the best health status is Baigou diversion river with a comprehensive score of 66,followed by Fuhe with a score of 55.The Tang River and Zhulong River are the worst in health.The main problem is that the riparian zone on both sides of the river is not wide enough,and the river is seriously lack of water.After optimization,the health of the rivers has been greatly improved.Among them,the comprehensive health index of Tanghe and Zhulong rivers have increased the most,with an increase of 69%and 80%respectively.The optimization of river wetlands is mainly reflected in the increase of the vegetation coverage of the shoreline and the width index of the riparian zone.Therefore,it is still necessary to strengthen the optimized management of the river wetlands,enhance the bank stability of the river wetlands,and enhance the ecological functions of the wetlands.