浦东开发以来的河网变迁研究

Study on the Evolution of River Networks since the Development and Opening of Pudong

利用1989年、1994年和1999年三个时相的航空像片、土地利用变化资料,通过遥感、GIS等技术手段,从河网变化的时空特点与原因入手,对浦东开发以来的水环境变化进行动态跟踪。研究表明:(1)浦东开发以来,河网密度下降了1/3强;(2)河网减少经历了由快速下降到基本稳定两个阶段;(3)高速的土地城市化是导致近年河网数量减少的主要原因。水网面积急剧下降,严重破坏了浦东的水乡特色,有损于浦东的投资环境。

Making use of aero photographs of 1989,1994,1999 and land use data,starting with space-time characteristics and reasons of river system change,we have dynamically studied the water environmental change since the opening of Pudong,by means of Remote Sensing and Geographic Information System. The study shows that:(1) the density of river system has declined more than 1/3;(2) the river system has experienced two declining phases:rapid declining (1989～1994) and almost leveling off (1994～1999);(3) the rapid urbanization of land is the primary reason for the declination of river system of these years. The rapid declination of the river system area seriously damages the feature of water village and the investing environment of Pudong.