城市河流的渠道化园林化问题与自然化要求

Issues related to channelization and garden lization and natual requirement of rivers

讨论了渠道化和园林化对于城市河流生态系统的危害,指出当前盛行的城市河流园林化是新一轮河流的人工化改造。提出了河流修复的自然化方法,即以水质条件恢复、水文条件恢复、河流景观格局改善和生物群落结构改善为目标的河流生态修复方法。还讨论了河流的美学价值,指出自然河流是具有高度生物群落多样性和景观异质性的开放地带,只有自然河流才能给人以审美欢愉,因此河流的美学价值核心是自然之美。河流的园林化不仅造成生态系统的胁迫,而且降低了河流的美学价值。

The stress on river ecosystem in urban area is discussed that result from both rivers ehannelization and gardening. It is point out that rivers gardening in vogue is man-made process. The river restoration as naturalization process is proposed that including water quality restoration, recovery of hydrological regime, restoration of river landscape pattern and community recovery. The river esthetics value which core is nature beauty is discussed. Natural river corridors are areas of great biodiversity and landscape heterogeneity, and provide open space for aesthetically pleasing and visual enjoyment. The man-made rebuilding of rivers not only results in stress on ecosystem but also reduce esthetics value.