Presentation Title

Assessing Seasonal Variations of the Water Quality from the North Atwater Village, Los Angeles River

Faculty Mentor

Roman Ferede, Cris Lui, Christyanne Melendez, Jamie Anderson

Start Date

17-11-2018 8:30 AM

End Date

17-11-2018 10:30 AM

Location

CREVELING 60

Session

POSTER 1

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

A geographical, chemical, and microbiological analysis regarding conditions ofthe Los Angeles River post channelization at North Atwater Village, a location that sits at the midpoint between the mouth and headwaters at Atwater Park Greenway Trail, and downstream a Water Reclamation Plant , was conducted with two water samples collected in December 2017 and March 2018. The December sample was collected during dry weather conditions while the March sample was collected during wet weather conditions. The goal of this research was to identify common contaminants and investigate the water quality at the same location with variable seasonal conditions. The water was analyzed with five different chemical experiments such as titration; spectroscopy and using some commercially purchased chemical strips and one microbiological experiment using Edvotex water quality test kit. Some of the data from the test strips show the presence of Chlorine, Sodium, and Sulfate and in addition, the water from both March and December showed trace amounts of nitrate, nitrite, lead and iron. Overall the water sample from December had higher concentrations of chemical contaminants than March also pH testing concluded the December water was more acidic. The determination for hardness using testing strips shows magnesium and calcium resulted ‘moderately hard’ in December and ‘slightly hard’ in March and using complexometric titration it was found that concertation of these ions was 77 ppm for December and 28 ppm for March. The presence of Coliforms was detected in both December and March, making it unsafe for consumption. Using Edvotex test kits the presence of E.coli was detected in the March water sample but not in the December sample. Qualitatively, the water on site was polluted with trash for both seasons and habitat destruction was more obvious for March water. Through this analysis further investigation to pinpoint human and environmental factors can be conducted to determine where the impurities are derived, leading to cleanup efforts and a reversal of the Los Angeles River to a its natural state.

Summary of research results to be presented

Chlorine, Sodium, and Sulfate were present in both water samples

December waters had higher concentrations of contaminants than march.

The pH difference had more acidity in December while more basic in March.

The determination for hardness through testing magnesium and calcium resulted ‘moderately hard’ in december and ‘slightly hard’ in March

Coliforms were present in both December 2017 and March 2018 \

the March water sample had the presence of E. Coli.

the water from March and December showed trace amounts of nitrate, nitrite, lead and iron.

Qualitatively, the water on site was polluted with trash and habitat destruction was obvious

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Nov 17th, 8:30 AM Nov 17th, 10:30 AM

Assessing Seasonal Variations of the Water Quality from the North Atwater Village, Los Angeles River

CREVELING 60

A geographical, chemical, and microbiological analysis regarding conditions ofthe Los Angeles River post channelization at North Atwater Village, a location that sits at the midpoint between the mouth and headwaters at Atwater Park Greenway Trail, and downstream a Water Reclamation Plant , was conducted with two water samples collected in December 2017 and March 2018. The December sample was collected during dry weather conditions while the March sample was collected during wet weather conditions. The goal of this research was to identify common contaminants and investigate the water quality at the same location with variable seasonal conditions. The water was analyzed with five different chemical experiments such as titration; spectroscopy and using some commercially purchased chemical strips and one microbiological experiment using Edvotex water quality test kit. Some of the data from the test strips show the presence of Chlorine, Sodium, and Sulfate and in addition, the water from both March and December showed trace amounts of nitrate, nitrite, lead and iron. Overall the water sample from December had higher concentrations of chemical contaminants than March also pH testing concluded the December water was more acidic. The determination for hardness using testing strips shows magnesium and calcium resulted ‘moderately hard’ in December and ‘slightly hard’ in March and using complexometric titration it was found that concertation of these ions was 77 ppm for December and 28 ppm for March. The presence of Coliforms was detected in both December and March, making it unsafe for consumption. Using Edvotex test kits the presence of E.coli was detected in the March water sample but not in the December sample. Qualitatively, the water on site was polluted with trash for both seasons and habitat destruction was more obvious for March water. Through this analysis further investigation to pinpoint human and environmental factors can be conducted to determine where the impurities are derived, leading to cleanup efforts and a reversal of the Los Angeles River to a its natural state.