Drainage System and Ecological Risk Management in Urban Water Environment

本研究的目的是调查城市非点源污染物在径流过程中的存量和行为。它还旨在研究城市污染对受纳水体的生态影响。通过对城市沉积物现存量和行为的调查，揭示了城市沉积物中污染物的含量比在来源地和受纳水体之间的差异。从生态影响的研究结果来看，城市沉积物对吉松摇蚊具有一定的生态毒性。研究结果为城市污染的环境管理提供了一些有意义的认识。

The objective of this study is to survey standing stock and behavior of urban nonpoint pollutants in their runoff process. It also aims at examining an ecological impact of the urban pollution on the receiving water. From the surveys on the standing stock and behavior, differences in content ratio of pollutants in urban sediments from their sources to receiving water were shown. And, from the examination on the ecological impacts, ecological toxicity of the urban sediments for Chironomus yoshimatsui was shown. As a result, some significant knowledge for the environmental management of urban pollution has been obtained.