南宁城市空间扩展及其生态环境效应研究

Environmental Effects of Urban Expansion in Nanning

南宁城区面积由1990年的45.77km2增长到1998年的98.13km2,再到2006年的181.77km2,年净增率达到了8.5%,相当于16年来新建了近3个原南宁市城区,并以"辐射式"与"圈层式"的方式向外扩展;伴随着城市空间快速扩展,南宁城市生态环境出现了热岛效应加剧、城市边缘地带绿地大面积减少、大气质量下降、水域面积减少及水体污染加重等问题。

The urbanized area of Nanning has increased at an annual rate of 8.5% from 45.97 km^2 in 1990, to 99.13 km^2 in 1998, and 181 77 km^2 in 2006, tdpling in only 16 years. Nanning＇s urban growth occurs in both radiation and expansion modes. This rapid expansion has generated environmental problems. Nanning is expadencing an increased urban beat island effect, a decrease of green space in the urban fringe, poor air quality, a decrease in water surface area, and water pollution.