Background Suzhou Cree Suzhou Creek before and after rehabilitation 10.0 9.0 8.0 7.0 Shanghai waterways 50 ■ 23783 rivers,totaling 22286 3.0 kilometers. 2.0 199319941995199619971998199920002001200220032004200520062007200820092010 ■ river density of 3.51km/km2 Comprehensive water quality variation of Suzhou Creek from 1993 to 2010Background 卢湾区 徐汇区 长宁区 普陀区 闸北区虹口区 杨浦区 闵行区 宝山区 嘉定区 浦东新区 南汇县 奉贤县 松江区 金山区 青浦区 崇明县 静安区 Suzhou Creek黄浦区 Suzhou Creek before and after rehabilitation 8.0 7.4 7.7 6.9 7.1 6.7 6.7 5.5 5.8 6.1 5.9 6.2 5.9 5.8 5.8 1.0 2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 199319941995199619971998199920002001200220032004200520062007200820092010 WQII Comprehensive water quality variation of Suzhou Creek from 1993 to 2010 ◼ 23783 rivers , totaling 22286 kilometers. ◼ river density of 3.51km/km2 Shanghai waterways