南昌市位于东经115°31′～116°24′,北纬28°16′～29°18′,江西东北部,长江流域中、下游,赣、抚冲积平原波阳湖滨,是江西省省会。赣江干流,自南西向北东经市区,在八一桥以下分主支、中支、北支、南支等四支进入尾闾区,抚河经市郊东南边境由青岚湖入波阳湖。南昌市行政管辖面积(包括南昌、新建两县)共4791平方公里,南昌市区164.3平方公里,市区75%的地区低于八一桥历史最高水位24.32米(吴淞标高,下同)以下2～4米,低于赣江五十年一遇洪水位25.21米者占80%。只有青云谱、城西沿江狭长脊地和城东太子殿少数高地,在五十年一遇洪 Nanchang is located in the east longitude 115 ° 31 ’to 116 ° 24’ and north latitude 28 ° 16 ’to 29 ° 18’. It is the capital of Jiangxi Province in northeastern Jiangxi Province, the middle and lower reaches of the Yangtze River valley, Jiangxi and the alluvial plains. Ganjiang River, from the southwest to the north east via the urban area, in the Bayi Bridge following the main branch, branch, North Branch, South Branch and other four into the tail area, Fuhe through the suburbs southeast border from the Green Lan Lake into the sun lake. Nanchang City administrative area (including Nanchang, the new two counties) a total of 4791 square kilometers, Nanchang urban 164.3 square kilometers, 75% of the urban areas below the Bayi Bridge history of the highest water level 24.32 meters (Wusong elevation, the same below) 2 ~ 4 meters, less than Gan River in 50 years a flood of 25.21 meters accounted for 80%. Only Qingyun spectrum, along the narrow strip of land along the west coast of the city and a few highlands Prince Edward Temple East, floods in 50 years