Publication Date


Committee Chair

Fang Ren, Ph.D.

Committee Members

Douglas M. Flewelling, Ph.D.


Analyzing 4-nonylphenol deposition the Sierra mountain area using GIS project aimed to protect and conserve the eastern side of the Sierra Nevada mountains from a toxic pollutant. The pollutant substance is 4- nonylphenol (4NP) and it is produced from Nonylphenol polyethoxylates that make up 10% or more of the volume of many pesticides. Furthermore, Fresno County, in California’s Central Valley is one of the primary producers of agricultural goods in the United States. Also, it is the number one pesticide user in California. Dr. Rebecca Lyons, the client is trying to find a way to analyze 4NP and how is transported to the fragile ecosystem of the Sierra Nevada mountains. She hypothesized that the topographical shielding has a correlation with the concentration with 4NP. Additionally, a web application was developed to support her research and raise the awareness about the problem and raise the awareness about the problem in order to illuminate the use of this chemical substance.

Bugshan, Omar_Poster.pdf (1575 kB)
Analyzing 4-nonylphenol Deposition in the Sierra Mountain Area Using GIS (Poster)


Article Location