Modelling of emerging non-point water pollution problems and management measures

新出现的非点状水污染问题和管理措施是本提案的主要重点。西尼罗河病毒已成为一个具有国家意义的公共卫生问题。在多伦多对西尼罗病毒的幼虫捕获计划进行了三年的实地研究后，申请人发现这一公共卫生问题可能会对接收水造成非点状水污染。为了了解降雨对幼虫繁殖计划的影响以及水污染问题的严重程度，申请人建议建立数学模型来模拟捕集池和相关下水道排放口的灭幼虫化学品的命运。这些模型可用于评估西尼罗病毒灭幼虫方案的有效性以及对接收水的潜在生态影响。绿色屋顶可以定义为通过在传统屋顶系统上添加生长介质和植物层而创建的绿色空间。它在城市化城市中引起了很多关注，因为它有可能减少高度城市化地区的暴雨径流。根据CRESTech对绿化屋顶的效益和成本的研究，申请人建议建立数学模型，以模拟绿化屋顶的雨水性能，以及在流域基础上绿化屋顶的累积雨水性能。这些模型可以帮助(1)建筑业主认识到屋顶绿化的雨水效益；(2)城市制定雨水管理的绿化政策。建议的研究项目将有助于我们了解新出现的非点状水污染问题和管理措施。

Emerging non-point water pollution problems and management measures are the main focus of this proposal.   West Nile Virus has become a public health problem of national significance. After three years of field study of the larvicidng program for West Nile Virus in Toronto, the applicant has discovered that this public health problem may cause non-point water pollution in the receiving water.  In order to understand the effect of rainfall on a larviding program and the extent of the water pollution problem, the applicant proposes to develop mathematical models to simulate the fate of larviciding chemicals at catch basins and the associated sewer outfall.  These models can be used to evaluate the effectiveness of a larviciding program for West Nile Virus as well as the potential ecological effect on the receiving water. Greenroofs can be defined as a green space created by adding layers of growing medium and plants on top of a traditional roofing system. It has attracted a lot of attention in urbanized cities because it has the potential to reduce storm runoff in highly urbanized areas.  Building upon a CRESTech's research study on benefits and costs of greenroofs, the applicant proposes to develop mathematical models to simulate the stormwater performance of a greenroof as well as the cumulative stormwater performance of greenroofs on a watershed basis. These model can assist (1) building owners to realize the stormwater benefit of a greenroof; and (2) muncipalities to develop a greenroof policy for stormwater management.   The proposed research projects will contribute to our knowledge of emerging non-point water pollution problems and management measures.