Extraction And Analysis Of Remote Sensing Information Of The Baiyangdian Wetland Variation In Xiong'an New Area In The Past Twenty

Wetland is"the kidney of the earth."Wetland is the"kidney of the earth"wetland for the whole earth's ecological environment and community of life has an important significance,it has a unique,irreplaceable position.Wetlands can improve the ecological environment,enhance metabolism and protect the earth.It is precious but fragile.Therefore,we should pay more attention to wetland research,strengthen wetland protection,prevent wetland from declining year by year,and further maintain sustainable development of wetland.This paper preprocesses the remote sensing image data of the Baiyangdian Lake in the Xiong'an New District for twelve periods from 1996 to 2018 by using remote sensing technology.The results were obtained by supervising the classification,supplemented by visual interpretation and correction,and finally the wetland situation data of the Baiyangdian Lake in the Xiong'an New District in different periods were obtained.This paper analyzes the landscape pattern change of Baiyangdian Wetland,and discusses the driving force of the change of Baiyangdian Wetland combining with the area change and landscape pattern change of each feature type of Baiyangdian Wetland.The main results of this study are as follows:?1?Supervised classification of remote sensing image maps for the twelve periods of 1996,1998,2000,2002,2004,2006,2008,2010,2012,2014,2016,and2018.The classification results are modified by visual interpretation,and then the area of surface features in each period,as well as the area and proportion of wetland and non wetland are calculated.By analyzing the extracted area data of Baiyangdian Lake,the area of??Baiyangdian Lake in 2018 was about 352.78Km^2..This study divided water and aquatic vegetation into wetlands;construction land,cultivated land,and paddy fields were divided into non-wetlands.According to statistics,the total wetland area in 2018 was 205.68Km²,and the total non-wetland area was 147.1Km².From 1996 to 2018,the wetland area in Baiyangdian Lake area decreased by75.37Km²,water and aquatic vegetation have all decreased,while the areas of construction land,cultivated land and paddy fields have increased relatively.?2?Through the analysis and investigation of the relevant data,it is not difficult to find that the landscape environment data of Baiyangdian is relatively diverse.From1996 to 2018,the fragmentation degree of construction land,aquatic vegetation,cultivated land and paddy field increased year by year.However,in terms of the overall landscape structure,the open water body and aquatic vegetation have certain integrity.With the increase of years,the proportion of wetland landscape types in Baiyangdian tends to be balanced.?3?Through this study,it is found that the driving forces affecting the change of Baiyangdian Wetland can be roughly divided into natural factors and human factors.Natural factors analyzed the effects of the average annual precipitation and annual average climate on the wetland area in the Baiyangdian Lake area from 1996to 2018.Then human factors are mainly analyzed from the aspects of population growth rate,human activities and interregional water transfer in Baoding.In the end,it was found that the main reasons driving the change of Baiyangdian Lake were human factors.The most important factors were population growth and interregional water transfer.