The geographical environment of baibu

Baibu Town is located in the west of Haiyan County, adjacent to Haining City, and belongs to the Shanghai Economic Open Zone in the Yangtze River Delta. Shanghai 137km to the east and Hangzhou 80km to the south. The town covers an area of 64.7 1 km2 and a population of 35 148.

The city boundary is between 30 degrees 32 minutes and 30 degrees 54 minutes north latitude and 65,438+020 degrees 46 minutes and 65,438+020 degrees 77 minutes east longitude. It is adjacent to Luzhong Village in the east, Shiquan Town in the south, Nanhu District in Jiaxing in the north and Haining City in the west, with dense river networks and convenient land and water transportation. Huyan Highway (X 109). Jiayu Strait passes through the territory and goes straight to Huangpu River. It is a four-class waterway with a navigation capacity of 500 tons. It is less than100km away from Shanghai, Hangzhou, Suzhou, Lake and other cities, and has obvious geographical advantages among Shanghai, Hangzhou, Suzhou and Ningbo. Baibu Town is an alluvial marine plain with a relatively long land-forming age. According to the study of unearthed cultural relics, human beings lived in this land about 5000-6000 years ago, with low terrain and dense rivers and ports. According to statistics, the average elevation of Baibuchang is 4.44 meters, and the water area accounts for 8.75% of the total land area.

Baibu Town is located in the Yangtze paraplatform (Grade I), Hangjiahu platform oblique (Grade II) and Haiyan-Qian Qing uplift (Grade III), which is the northeast extension of Linpu-Changshan uplift. Mesozoic belongs to the second-order Haining-Haiyan uplift in Hangzhou Bay Depression, and Hangjiahu area sank in the late Cenozoic and became the Yangtze River impact plain. All strata in the territory are covered by Cenozoic Quaternary. According to the drilling data of the region and surrounding areas, the outline of geological structure in China has three layers from the surface down. Namely Quaternary sediments, Jurassic volcanic rocks, lower paleontological carbonic acid and clastic coast. Below the third layer is the basal layer, which is a pre-Sinian metamorphic layer. Baibu Town, located in the southern edge of the northern subtropical zone, is a typical East Asian monsoon climate with four distinct seasons, abundant heat, abundant precipitation, the same season of rain and heat, and a mild and humid climate. Summer is controlled by the summer monsoon from the ocean, with southeast winds prevailing and typhoons appearing from time to time; Winter is controlled by the prevailing winter wind in Chinese mainland, with more northerly winds; Spring and autumn is a period of alternating winter and summer monsoon, with changeable weather in spring and fresh air in autumn.

The average annual sunshine in the whole town is 188 1.6 hours, and the sunshine percentage is 42.4%, with an annual variation range of 168 1-2256 hours. Judging from the annual variation of sunshine, July and August are controlled by subtropical high, and the solar radiation and sunshine time are also the longest. Among them, August is the most, with 228.8 hours and sunshine percentage of 56.0%. February is the least, only 107.4 hours, with sunshine rate of 34.3%.

The annual average temperature 15.9℃, the range of change15.4-17.1℃, and the maximum temperature difference 1.7℃ are typical temperature characteristics of summer without intense heat and winter without severe cold. The annual average accumulated days of high temperature are obviously lower than those in cities of the same latitude in the middle and lower reaches of the Yangtze River. Common meteorological disasters include typhoon, rainstorm, continuous rain, cold wave, hail and strong wind. It has the characteristics of both north and south agriculture and a wide variety of crops. 65438+ 10 is the coldest month in the whole year, with an average temperature of 4. 1℃, a monthly minimum temperature of 0.6℃ and an extreme minimum temperature of-10.8℃, which occurs in 1977 1. July is the hottest month in a year, with an average temperature of 28℃, a monthly maximum temperature of 30.7℃ and an extreme maximum temperature of 40. 1℃, which occurred on July 23rd, 20 13.