The cause of bacterial pollution in most cities is due to poorly designed or overwhelmed stormwater and sewer systems (Langergraber and Muellegger, 2005) which poses serious human health risks (Tran et al., 2015).
Precipitation totals indianapolis drivers#
The results from this study help us to better understand how different drivers influence fecal coliform growth and how this information can be potentially used to predict and remediate the conditions of urban water streams. At the same time, large hydrologic events act to flush and dilute fecal coliform concentrations. These findings suggest a push-pull balance within the system where CSO activation and seasonal gradients replenish and promote fecal coliform growth. The most significant predictors of decreased fecal coliform were maximum precipitation during the ten-day window prior to sampling and median discharge during a three-day window prior to sampling. The most significant predictors of increased fecal coliform concentrations were precipitation on the sampling day and cumulative degree days. We found no relationship between fecal coliform levels and the number or density of CSO outfalls above a given site. All PRW and FC sampling sites significantly exceeded the EPA contact standard limit of 200 CFU/100 mL for fecal coliform concentrations during the sampling period. The sampling occurred biweekly over one year for PRW, nine months for FC, and an intense (∼every three days) sub-analysis of the presumed peak period of fecal coliform growth (July) for WR. The waterways are Pleasant Run Creek (PRW), Fall Creek (FC) and White River (WR). The aim of the study is to examine fecal coliform concentration, water chemistry, and water quality parameters to better understand spatio-temporal patterns of fecal coliform associated with CSO events in three waterways from Indianapolis, Indiana (USA). The input of effluent waste from CSO to urban water streams during storm events often leads to elevated fecal coliform, specifically Escherichia Coli (E.
Then cooler air moves and and we get ready for our next best snow chances coming up on Friday.Many urban waterways with older stormwater drainage systems receive a significant amount of untreated or poorly treated waste from Combined Sewer Outflow (CSO) systems during precipitation events. It will be dry through the weekend and start of the week. Warmer weather will be around starting off next week once again. Rain will continue to fall through the evening. Totals so far through Friday afternoon have been close to 2 inches in some locations. Heavy downpours across the state Friday prompted a flood warning until 5 p.m. Later Friday evening, we begin to dry out, left with cloudy skies and periods of drizzle. This wet snow does however, have the ability to give minor accumulation of up to an inch in some locations. Wet snow flakes will be the type most people see out of this system. This line from rain to snow along the boundary with cooler air will get fairly close to I-70 by 5 p.m. (Wet) snow likely as temperatures dropĪs temperatures begin to drop, we are expecting periods of snow for northern and north-central Indiana. New rainfall amounts of over 2 inches are likely. Excessive rainfall will cause flooding across parts of Central Indiana. Saturday in the surrounding Indiana counties outside of the warning. This prompted the National Weather Service to issue a flood warning through 5 p.m. Heavy downpours have been present throughout the day Friday. Travel will be increasingly difficult with standing water and excessive winds Flood warnings and watches in effect Damaging winds will blow down trees and powerlines, with widespread power outages a possibility. Gusty winds will blow around unsecured objects outside during this time. A wind advisory is also in place for surrounding Indiana counties through Friday night. Winds gusting up to 60 mph puts Central Indiana under a high wind warning until 1 a.m. INDIANAPOLIS – Tracking heavy showers, strong winds, and storm activity across Indiana.
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