Bacheng geography

Position and situation

Bacheng town is located at northwest part of Kunshan city and east coast of Yangcheng lake, it is adjacent to Shajiabang town and Renyang town of Changshu City to the north, the town face up to high-tech area to the east and Zhoushi town, north side is Loujiang river while Yangcheng lake is neighbor to the west. Regional area is 157 square kilometers.

Climate

Bacheng town is located in the northwest hinterland of Kunshan City, zone climate is a subtropical southern monsoon climate, there are four distinct seasons, Summer is hot and rainy while winter is cold and dry, spring and autumn climate is pleasant, there is full-time sunshine in a year, sunshine hours are between 2000 and 5000 hours, there is abundant rain, the average annual rainfall is 1100 mm, frost-free period is about 220 days, average annual wind is between level 2 to level 3, a mild climate, the annual average temperature is about 15.4 ℃ or so. In summer, oceanic air masses are enveloped by subtropical high pressure, single airflow is formed, it is not easy to form frontal surface, high temperature and summer drought frequently occur, sometimes temperature is about 36℃. Maximum temperature was 38℃ on July 8,1978. In winter, due to influence of continental polar air, blowing northwest wind is common, temperature plummeted, because sometimes the strong cold air will influence from the north, the minimum temperature is between minus 5℃ to minus 8℃ . The lowest temperature on November 31, 1977 was minus 11.7 ℃. The temperature is below 20℃ in autumn.

Landforms

Bacheng is loacted in east low-lying polder of Taihu lake, ancient wells, stone, pottery and streets and other relics were found in territory of the ancient cultural sites, such as Longtan Lake, Wu Cheng Tan and other rivers, land formation time of Bacheng is earlier,its evolution process is continental facies→new tectonic movement of settlement, flood inundation→sedimentation, regression into land→Part of the land sinking, rise and fall, meadow soil environment become water country. And after silt deposition and water erosion shore process for a long time, current large five lakes, rivers and plenty of lakes and lake numerous geographical environment were formed. The west of town has Yangcheng Lake, puppet lake, eel carp lake, North of the city has Bacheng lake and Zhicheng lake, five lakes connect together. There are dense stream in the east, there are Zhangjiagang, Yanglin pond, Zhicheng pond, Maosha Tong, Gutang River, Xintang River and so on. Numerous rivers and lakes divide the land into a wide range of high-middle and low-valleys.The average elevation of the territory (Wusong base surface, below is the same) is 3.4 meters, highest elevation of the northwest is 4.5m, minimum highest elevation of the Southeast Hongyao and Yangjia village is 2.2m, the terrain is tilted from west to east and the natural slope is small.

Hydrology

Bacheng is located in the low-lying areas east of Taihu Lake, total area is 53.66 square kilometers before 2003, it is about 23529 acres, water area is 23529 acres, it accounts for 29.23% of the total area, It belongs to Yangcheng Lake group. north and south is higher while middle is lower for total terrain.

West of the town has Yangcheng Lake, puppet lake, East Yangcheng Lake, the northern part has Bacheng lake and Zhicheng lake, five lakes connect each other. There are dense rivers, there are Zhangjiagang, YangLin Pond, Zhicheng Pond, MaoSha Pond, GuTang River, Xintang River, Weitang River, Miaojing River, Loujiang, etc.Numerous rivers and lakes divide the land into a number of high-low, mid-range butterfly basins. The average elevation of the territory (Wusong base surface, below is the same) is 3.4 meters, highest elevation of the northwest is 4.5m, minimum highest elevation of the Southeast Hongyao and Yangjia village is 2.2m, the terrain is tilted from west to east and the natural slope is small.