关键词: 白洋淀湿地, 景观格局, 驱动因素, 生态规划, 雄安

Abstract: Landscape changes and its drivers of Xiong'an Baiyangdian wetland between 1999 and 2017 were analyzed based on remote sensing(RS) and geographical information system(GIS).Results showed that,from 1999 to 2017,wetland area showed a trend of rapid reduction first and then slow increase,with a decrease of 5 019.66 hm²,down by 19.35% totally;cultivated land and bare land area increased first and then decreased by a small margin;forest land and construction area increased year by year.The most prominent changes during 1999—2017 are the mutual transformation of farmland and bare land,and the mutual transformation of natural water,artificial water and aquatic plants.In the first and middle period,the outflow of wetlands was the main trend.From 2011 to 2017,the agricultural expansion was controlled and gradually transformed into the inflow of farmland and bare land to wetland.From 1999 to 2017,The number of patches in Baiyangdian wetland increased from 11 722 to 16 720,and the patch density increased from 36.08 to 51.47.The landscape fragmentation degree of Baiyangdian wetland increased.The Area-Weighted-Mean Shape Index showed a trend of decreasing first and then increasing,and the patch shape of wetland became more and more complex.With the increase of Shannon diversity index and Shannon evenness index,the landuse of Baiyangdian wetland is more and more abundant,and the dominant role of dominant patches is gradually reduced.The main reasons for the change of landscape pattern in Baiyangdian in the past 18 years are climate change,decrease of precipitation,economic development,expansion of urban and agricultural land,the government's policy of diverting water and returning farmland to lake,etc.Aiming at wetland restoration and sustainable development,Baiyangdian wetland is divided into six ecological functional areas.

Key words: Baiyangdian wetland, landscape pattern, driving factors, ecological planning, Xiong'an