Impact of storm water on groundwater quality below retention/detention basins

Abstract

Groundwater from 33 monitoring of peripheral wells of Karachi, Pakistan were evaluated in terms of pre- and post-monsoon seasons to find out the impact of storm water infiltration, as storm water infiltration by retention basin receives urban runoff water from the nearby areas. This may increase the risk of groundwater contamination for heavy metals, where the soil is sandy and water table is shallow. Concentration of dissolved oxygen is significantly low in groundwater beneath detention basin during pre-monsoon season, which effected the concentration of zinc and iron. The models of trace metals shown in basin groundwater reflect the land use served by the basins, while it differed from background concentration as storm water releases high concentration of certain trace metals such as copper and cadmium. Recharge by storm water infiltration decreases the concentration and detection frequency of iron, lead, and zinc in background groundwater; however, the study does not point a considerable risk for groundwater contamination due to storm water infiltration.

Multivariate Analysis of Heavy Metals, Physicochemical and Microbial Characteristics to Determine the Water Quality of Lower Indus Basin, Pakistan

“…This could be the result of excessive floods or inflow of water into the river from the point and non-point sources after heavy monsoon rains, which diluted the concentration of heavy metal. These results appear to be in agreement with the findings of Zubair et al (2010), who examined the impact of stormwater on the quality of groundwater. The samples were collected from 33 monitoring wells during pre-and post-monsoon seasons.…”

Seasonal Assessment of Water Quality by Statistical Analysis in the Coastal Area of Sindh, Pakistan

“…There have been several studies on groundwater quality in the study area and had a focus on basic evaluation (Rubab et al, 2014;Husain et al, 2012;Zubair et al, 2010). The aim of the present study was to assess the groundwater quality in coastal areas of Sindh by using statistical analysis.…”

Development of composite alginate bead media with encapsulated sorptive materials and microorganisms to bioaugment green stormwater infrastructure

“…1 Failure to capture TOrCs in conventional bioretention media can potentially risk groundwater contamination. [14][15][16] Therefore, improved media for bioretention cells is necessary to remove TOrCs from stormwater in GSI while protecting underlying groundwater.…”