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Comparison of Water Discharge from Three Parking Lots in Nacogdoches

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Comparison of Water Discharge from Three Parking Lots in Nacogdoches Comparison of Water Pollutant Discharge from Three Parking Lots in Nacogdoches Mary-Leigh Winkler, Emily Greenstein, Turner McDougal, Bryce German Faculty Sponsor: Dr. Sheryll B. Jerez (Environmental Science) Stephen F. AusJn State University Nacogdoches, TX Introduc)on pH of Storm water Runoff Discussion & Conclusion Storm water runoff can have harmful effects on a community. Our results concluded that Pecan Park had a higher DO and higher Runoff water picks up chemicals and pollutants from surfaces 8.2 pH which is a result because of the large amount of organic materials that do not absorb water like concrete areas (ex. roads, 8 7.8 found near the park parking lot. Our results concluded that Pecan parking lots, and others) The same water will then eventually 7.6 Park had the best water quality which coincided with our hypothesis. be drained into local lakes, rivers, and surrounding 7.4 Sample 1 Although our total research results were inconclusive, the prevenJon environment. Our experiment measured the pollutant 7.2 of hazardous pollutants into storm water runoff is sJll an important Sample 2 discharge of parking lots aer a storm. The main water quality 7 issue. To keep Nacogdoches beauJful and have good water quality, Sample 3 indicators are temperature, pH, dissolved oxygen, and 6.8 the three possible soluJons are as follows: Permeable Pavements, turbidity/alkalinity. For the parking lot runoff measurements, 6.6 Rain Gardens, and a Water Quality Awareness Day. 6.4 the parameters we measured included copper and lead. Our 6.2 • Permeable Pavements: A large amount of contaminants entered hypothesis was that there are more metal pollutants and Wal-Mart Car Wash Peacan ParkPecan Park into the ecosystem when new development or construcJon is poorer quality in a Wal-Mart parking lot and car wash parking occurring in the community. “They provide a special type of lot than in a recreaonal park parking lot. Figure 1. Comparison of pH for three sampling days at three locations. pavement surface which allows water to infiltrate through the surface as an alternave to the tradiJonal impermeable Materials and Methods DO of Storm Water Runoff surfaces.” (Tota- Maharaj, 2010). To conduct our experiment, we had three sampling days • Rain Gardens: Rain gardens are community gardens strategically that took place aer a rainstorm. Before leaving to take our 12 placed in depressed areas to help naturally infiltrate the samples we made a field blank using disJlled water, and 10 rainwater. The benefits of a rain garden include the reducJon of took the blank with us and stored it with the other sample pollutants spread through runoff, improves the community 8 aestheJcs, and reduces erosion. boMles. We took the pH and dissolved oxygen reading on Sample 1 site using the HQd portable meter, at each of the three 6 • Water Quality Awareness Day: To get people aware and mg/L Sample 2 parking lot locaons. We also took a boMle of sample water concerned about a problem is to have them be involved. Stephen 4 Sample 3 at each site and brought them back to the lab for tesJng. In F. AusJn State University environmental science and water the lab, using the spectrophotometer and Hach reagents, 2 quality students could work with Nacogdoches Parks and Recreaon Department to teach the community about their we tested for total alkalinity, lead, and copper. 0 Wal-Mart Car Wash Peacan Park environmental water quality. Figure 2. DO comparison at three locations for three sampling days Results The most reliable results came from our on-site tesJng of pH and DO taken with the HQd portable meter. Pecan Park had an average pH of 7.74 and a DO reading of 9.20 mg/L. Wal-Mart had an average pH of 7.43 and a DO reading of 8.15 mg/L. The Car Wash had an Example of Permeable Example of a Rain Garden average pH of 7.22 and a DO reading of 6.69 mg/L. The data Pavement hp:// hMp://www.cuyahogaswcd.org/ collected using the spectrophotometer was suspect due to several watershedfriendlysurfacealternaves. grannunded-raingardens.htm possible reasons. On the first and second water collecJon days, we files.wordpress.com/2013/04/082109- froze the samples because the environmental assessment lab was permeable-pavers.jpg not open on the weekends when it happened to rain. We also did Literature Sources not put any preservaves in the samples before freezing them Tota-Maharaj, Kiran, and Miklas Scholz. "Efficiency of Permeable Pavement Systems because of our limited budget and access. Other errors occurred for the Removal of Urban Runoff Pollutants under Varying Environmental CondiJons." Collecng water samples because of parJcles in the water were not filtered out which then Environmental Progress & Sustainable Energy 29.3 (2010): 358-69. Print. interfered with the spectrophotometer readings. .
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