Social and Behavioral Sciences Commons^™

Johnson Creek Bacteria Tmdl Implementation: Status And Trend Analysis Study, John Gala

Environmental Science and Management Professional Master's Project Reports

Like many other waterbodies in the United States, Johnson Creek, a tributary of the Lower Willamette River is water quality limited for bacteria. Escherichia coli (E. coli), a member of the fecal coliform bacteria group, has been found to have a high association with human pathogens and the occurrences of gastrointestinal illnesses in waters used for contact recreation; E. coli is commonly used as an indicator of fecal contamination. In the State of Oregon water contact recreational standards for fecal exposure is assessed by measuring in stream levels of E. coli. Because Johnson Creek is water quality …

The Economic Value Of Forest Park Ecosystem Services: Results Of Five Focus Groups Conducted In Spring 2016, Randall A. Bluffstone, Pablo Barreyro, Jenny Dempsey Stein, Cody Kent, Antonia Machado

Economics Faculty Publications and Presentations

Objective: This initial phase of research lays the foundation for a survey using contingent valuation (CV) and choice experiment (CE) methods. We asked select Portland residents what they care about most in Forest Park, their willingness to pay (WTP) for improving ecosystem services and how they generally think about the value of those goods and services. These results will help us narrow the experimental design of the forthcoming CV/CE study.

Approach: We conducted a focus group in each of Portland’s 5 “quadrants.” We chose each location - Skyline, St. John’s, Cully, Foster-Powell and Hillsdale - based on either its proximity …

Estimating The Recreational Value Of Portland’S Forest Park, Randall Bluffstone, Ryan Burchett, Kahtan Eiwaz, Emma Ingebretsen, Peter Schaffer, Steve Toth, Szeto Yan Weng, Jordan Drinkhouse, Dat Huynh, Charles Maxwell, Joel Schutte, Tiffany Tram, Thananan Yupparit

Economics Faculty Publications and Presentations

Using the travel cost method, this study estimates the per-trip value and total annual value of recreational visits to Portland’s Forest Park. Based on the opportunity cost of visitors’ time and the estimated costs of travel, we derive a demand function for visits to Forest Park on the assumption that visitors value their trips to Forest Park at least as highly as the alternative uses of their time and money. The Portland Parks and Recreation Department supplied survey data for 2277 Forest Park visitors, of which we use 1626 observations.

We find that a truncated negative binomial regression best fits …