Stormwater wetlands as constructed wetlands can be used to manage stormwater runoff. It temporarily store runoff in shallow pools that support conditions suitable for the growth of wetland plants, and also promote the growth of microbial populations which can extract soluble carbon and nutrients and potentially reduce BOD and fecal coliform level concentrations
Stormwater wetlands are effective for pollutants’ reduction, where the efficiency can up to 40% of nitrogen removal using several processes such as denitrification, sedimentation, filtration, chemical adsorption, biological uptake, pollutant transformation, and pollutant storage. The climatic aspect is the main issues in pollutant removal efficiency. The interaction of hydrologic, hydraulic and botanical factors are also directly determines the treatment performance of constructed wetlands for stormwater management. More air, more micro-organisms and better treatment efficiency.
Not only the design criteria that should be aware of, but also the stormwater management aspects. Both land use planning and urban design must be coordinated and consider the downstream impact of urban development, with respect to water use and management and aquatic ecosystem conservation. A well managed plan is needed to be sure that sufficient water will be kept to manage the plant growth. The wetlands have to be maintained frequently, to ensure that public safety issues and environmental management considerations are taken care of, and also to keep the effectiveness of the wetlands. An environmental risk assessment of the sites can also be performed to ensure relevant controls and appropriate mitigation measures (depending on the level of risk) are highlighted for each site.
Ok this is boring—just saying.