The Study of Interannual Change of Urban Expansion, Precipitation and Water Area of Baiyang Lake in Xiong'an New Area

With the establishment of Xiong'an New Area, the process of urbanization in Xiong’ an will further accelerate, and the water area of Baiyang Lake will also be increasingly influenced by man-made and natural factors. In this study, thirty-six Landsat remote sensing images from 1982 to 2017 were used to extract the visible waters of Baiyang Lake, the construction land and rural residential land in Xiong'an New Area. Furthermore, the temporal and spatial changes of visible waters, construction land and rural residential land, as well as precipitation in Xiong'an New Area were analyzed. The results showed that: (1) The expansion rate of construction land in urban and rural residential areas was very different before and after 2000, but they all regularly increased year by year, only slightly different in magnitude and increase speed. (2) The fluctuation of the visible water area of Baiyang Lake gradually decreased, and it experienced three various stages: from the continuous decrease by a wide margin of the visible water area to the dramatic fluctuation, and to a relative stabilization gradually. After the year of 2003, the water area of Baiyang Lake had basically stabilized. (3) The annual precipitation in Xiong'an New Area gradually decreased and the fluctuation was obvious. Currently, the Baiyang Lake has become an urban wetland under artificially controlled, and the establishment of Xiong'an New Area will further promote the urban expansion. In the future, it is still necessary to explore and clarify the internal relations between Baiyang Lake and Xiong'an New Area.