Improving geospatial components of integrated stormwater management plans (ISMPs)

城市雨水径流中的污染物是城市水生态系统的主要压力来源，并随着不透水表面的增加而增加。我们在科尔·伍德·莱达尔联合有限公司(KWL)的行业合作伙伴经常为加拿大城市的雨水管理提供监测和建模建议，并在设计温哥华大都会雨水综合管理计划(ISMP)方面发挥了重要作用。我们的KWL合作伙伴报告称，几个常用的ISMP指标可能不足以用于监测。ISMP使用不透水面积百分比和河岸森林完整性百分比等土地复盖指标来预测和跟踪城市水系的变化。到目前为止，用粗略的空间分辨率数据来描述这些特征对于绘制精细的不透水表面和残留的河岸植被是不够的。该项目将改进与土地利用和土地覆盖(如不透水表面和河岸溪流植被)有关的指标，这些指标是ISMP办法的基础。评估执行管理计划的有效性和局限性，并提出改进建议，是继续执行这些计划的关键。

Pollutants in urban stormwater runoff from cities is a primary stressor on urban aquatic ecosystems andexacerbated by increased impervious surfaces. Our industrial partners at Kerr Wood Leidal Associates Ltd.(KWL) routinely provide monitoring and modelling advice for stormwater management in Canadian cities andhave been instrumental in designing Metro Vancouver's Integrated Stormwater Management Plans (ISMPs).Our KWL partners report that several commonly-used ISMP indicators are potentially inadequate formonitoring. Land cover measures such as % impervious area and % riparian forest integrity are used in ISMPsto predict and track changes in urban aquatic systems. To date, delineation of such features with coarse spatialresolution data is inadequate for mapping fine-scale impervious surfaces and remnant riparian vegetation. ThisENGAGE project will improve indicators related to land use and land cover (e.g., impervious surfaces andriparian stream vegetation) which underpin the ISMP approach. Assessing the effectiveness and limitations ofISMPs, and suggesting improvements, is the key to their continued implementation.