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Stormwater - Europe PMC

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Last Updated: 05 January 2023

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Performance monitoring of constructed floating wetlands: Treating stormwater runoff during the construction phase of an urban residential development.

Constructed floating wetlands can increase stormwater retention pond performance. Water in a 2. 6-ha lake receiving stormwater from a 45-ha urban area under construction in subtropical Queensland, Australia, was recirculated during dry weather periods to minimize algal growth and blooms. Both full-scale CFWs' efficencies were tested during storm events and dry weather seasons as a result of inlet and outlet pollutant concentrations, flow, and rainfall. Inlet TSS and TN concentrations in runoff during the construction phase of the development exceeded required water quality standards, although TP inflow concentrations were low and often below the detection threshold. Low and highly variable TSS and TN concentration removal efficiencies at CFW1 were poor and highly variable, partially due to low inlet concentrations, high flow velocities, and short hydraulic retention times. CFW2 has significantly reduced TSS levels during both storm events and inter-event periods.

Source link: https://europepmc.org/article/MED/36587660


Aquifer recharge by stormwater infiltration basins: Hydrological and vadose zone characteristics control the impacts of basins on groundwater chemistry and microbiology.

Stormwater filtration systems are designed to collect and infiltrate urban stormwater runoff into the ground for flood risk reduction and artificial aquifer recharge. Infiltration techniques, according to several studies, can have a significant effect on groundwater chemistry and microbiology. Thus, the present research sought to quantitatively determine whether changes in groundwater chemistry and microbiology induced by SIS were attributed to two variables associated with vaping zone characteristics and one factor related to groundwater recharge rate. A short water transit time from surface to groundwater increased dissolved organic carbon levels in the aquifer, which, in turn, increased biofilm biomasses in groundwater. During rain events, the flow of water and dissolved organic carbon in groundwater has probably increased the fluxes of water and dissolved organic carbon, which is the presence of microbial biofilms. Overall, the current research is the first to examine simultaneously many variables and processes in groundwater, which may explain the effect of stormwater infiltration on chemistry and/or microbiology.

Source link: https://europepmc.org/article/MED/36581297


Appraisal of stormwater-induced runoff quality influenced by site-specific land use patterns in the south-eastern region of Bangladesh.

Generally or indirectly associated with land use types in a catchment that is very different in different regions, pollutant concentrations of urban stormwater runoff are directly or indirectly related to land use types, and, as a result, site-specific studies are often recommended, unless otherwise the simulation of runoff quality using modelling techniques may not have accurately represented the current field conditions. In Chattogram city, where land use's demarcation is often complicated due to a multitude of natural and human-induced anthropogenic causes, this paper explores the influence of land use types on stormwater runoff physicochemical quality. Moreover, the current analysis revealed higher concentrations of few contaminants, such as TSS, BOD 5, and EC, derived from the residential land use patterns that are surprising; however, it highlighted the inherent complexity of unplanned land use patterns that should not be ignored rather than discussed.

Source link: https://europepmc.org/article/MED/36539661


Using Machine Learning to Improve Performance of a Low-Cost Real-Time Stormwater Control Measure

During construction, the conversion of natural land cover to impervious land surfaces increases stormwater runoff. Stormwater Control Measures are used to control water quantity and improve water quality by restoring the hydrologic cycle that has been altered by development. SCMs often have an outflow pipe to prevent overflows or to control the discharge of water retained when infiltration is not possible. This report used machine learning techniques to produce a forecasting approach for the introduction of low-cost RTC on a programmable gate of a multi-stage basin in southeastern Pennsylvania. Multiple linear regression and long-term memory were among the popular data science algorithms tested, as well as long-term memory. The SCM's contributing drainage area had a 30-minute lag time for approximately the same lag time, so a sufficient RTC operation period was required to enhance the outlet structure's efficiency.

Source link: https://europepmc.org/article/PPR/PPR585570


Monitoring the effects of urban and forested land uses on runoff quality: Implications for improved stormwater management.

Urban stormwater is a significant source of non-point source pollution. Stormwater quality was monitored from 15 watersheds to measure pollutant event mean concentrations and loads as a result of urban and forested land use and land covers, and rainfall patterns from a geographical area where these results are poor. With increasing rainfall depth and, in general, did not follow the same LULC trends as EMCs, meaning that loads were not affected significantly by watershed hydrologic responses. Mean annual loads of heavy metals from urban LULCs were much higher than those from forested and agricultural watersheds, although overall watershed loads were largely similar. Non-point source pollution will continue to harm surface water quality as land is developed, according to this study; it will help guide the design of cost-effective stormwater management plans.

Source link: https://europepmc.org/article/MED/36509280

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions