The study of spatio-temporal variation of impervious surfaces for Dianci Basin using TM imagery from 2002 to 2009

摘要: Impervious surface area (ISA) extraction is important for many planning and management applications because of the impacts that impervious surfaces have on a range environmental resources such as groundwater, hydrological cycle simulation, water pollution assessment. The Dianci Basin most developed economic district Yunnan province. In recent years, with rapid urbanization especially surrounding Dianchi body, coverage rate has also grown rapidly resulted in severe degradation basin environment within watershed. Extracting dynamic expansion both space time essential analyzing environment. Landsat other medium-resolution satellites provided necessary spatial details temporal frequency mapping past decade. this paper, we extracted ISA informations based images 2002, 2006 2009 by using artificial neural network monitored change multi-temporal surfaces. Results study were follows: (1) increased 47 square km from 2002 to 73 separately. (2) distribution was described according 2002/2006 percentage respectively. Most middle high mainly located city interior Kunming. (3) High moved inner southeastern south portions Kunming Lake during 2006-2009.(4) Combining social condition, driving relationship analyzed detail. It evident deep development eight years. Because government province proposed “Building new city” “Strategy about lake development,” Chenggong city, some industrial parks international airport been building since 2003. results valuable land use management, ecological protection treatment.