Abstract

This study presents the four years’ seasonal baseline hydrological condition of a proposed low impact development neighbourhood in Brantford, Ontario. A comprehensive monitoring scheme including on-site infiltration tests, topographic survey, and instream and groundwater monitoring was conducted on the site and in the adjacent Whitemans Creek and Lewis Drain. The streams’ high flows and storm responses are not included in the current study due to limited accessibility. Results show that sandy soil with a high infiltration rate on the site infiltrates the majority of the precipitation and supports the installation of permeable pavements. Surface water and groundwater interaction was observed at the Municipal Drain. Throughout the summer, the Creek has clear flow conditions for the majority of the time and baseflow accounts for a large proportion of flows in the Creek. During the monitoring period, water quality parameters in the Creek satisfied the CCME guidelines for the protection of aquatic life. The use of permeable pavements on the site will help to maintain pre-development water balance. As neighbourhood-level LID is rarely directly demonstrated, we encourage further investigations once the site has been developed.

摘要

本研究介绍了安大略省布兰特福德拟建的低影响开发社区四年的季节性基线水文状况。在现场以及邻近的 Whitemans Creek 和 Lewis Drain 进行了一项综合监测计划，包括现场渗透测试、地形调查以及河内和地下水监测。由于可访问性有限，当前研究未包括溪流的高流量和风暴响应。结果表明，场地上入渗率高的沙土渗透了大部分降水，并支持安装透水路面。在市政排水管处观察到地表水和地下水的相互作用。整个夏天，小溪大部分时间有明确的流量条件，基流占小溪流量的很大一部分。在监测期间，小溪的水质参数满足 CCME 保护水生生物的准则。在现场使用透水路面将有助于维持开发前的水平衡。由于社区级 LID 很少被直接展示，我们鼓励在网站开发后进行进一步调查。