Urban stormwater management (USWM) in developed countries is undergoing a significant evolution. Centralized systems are giving place to distributed facilities, mainly to cope with flooding caused by fast urban growth and with water bodies’ quality degradation. This evolution has to face inertias from existing structures, but it relies on the idea that new strategies are more sustainable than o...

A simple spreadsheet model was used to evaluate potential water quality benefits of high-density development. The question was whether the reduced land consumed by higher density development (vs. standard suburban developments) would offset the worse water quality generated by a greater amount of impervious surface in the smaller area. Total runoff volume and per acre loadings of total phosphor...

In Finland, based on the Land Use and Building Act, city has a monopoly in urban planning design. Through monopoly, manages process thus consciously develops structure. Based number of parking spaces stipulated for property local detailed plan building permit must be provided connection with construction work. The obligation providing plans affects society many ways. provision is key economic f...

The design of three stormwater treatment facilities, aiming at implementing and demonstrating technologies that efficiently reduce diffuse urban pollutant loads onto receiving waters is presented. The designs aim at reducing not only particulates, but also dissolved pollutants and pollutants associated with colloids. Unit operations that are efficient in this respect are discussed. Different te...

Urban water systems consist of natural and engineered flows of water interacting in complex ways. System complexity can be understood via mass conservative models that account for the interrelationships among all major flows and storages. We have developed a generic urban water system model in the R package CityWaterBalance. CityWaterBalance provides a reproducible workflow for studying urban w...

Urbanization has been found to impact stormwater runoff quantity and quality. A study catchment with mixed land use, residential and industrial were investigated and the water quality discharged from the catchment were sampled and tested for four basic water quality parameters; BOD5, NH3-N, NO3-N and P. One dry weather flow and several stormwater runoff were sampled. Results were compared to th...