In Hu-Su-Xi-Chang city zone, with intensive urbanization, the urban area expands as much as about 635.2 km2 and the runoff volume increases by 6.5%.

• 城市化高度发展的沪-苏锡常城市带，1985-2000年间城镇面积增加635.；2平方公里，相应径流量增长6