Risk behaviors and self-reported illnesses among Pacific Northwest surfers.

Although surfers have high incidental exposure to marine waters, no studies have investigated if surfer risk behaviors (such as surfing during advisories, near an outfall, during a rain event, or use of personal protective equipment) increase or decrease the risk of acquiring waterborne illnesses. We used a web-based survey to assess the association between risk-based behaviors and self-reported illnesses among Pacific Northwest surfers. Commonly reported illnesses include: ear infection or discharge (38%), sore throat or a cough (28%), diarrhea (16%), fever (10.5%), and vomiting (7%). Surfing often during rain events was associated with an increased likelihood of diarrhea (OR = 2.7; 95% CI: 1.4-5.47), sore throat (OR = 1.26; 95% CI: 1.01-2.05), and ear infection (OR = 1.39; 95% CI: 1.01-2.32). Surfing during a health advisory was associated with increased likelihood of diarrhea (OR = 1.94; 95% CI: 1.03-4.64) and sore throat (OR = 2.32; 95% CI: 1.23-4.40). Other behaviors associated with increased illnesses include body surfing, surfing near an outfall, frequency of surfing, and use of ear plugs. Approximately 40% of surfers were unaware if they had surfed during an active health advisory and 29% knowingly surfed during advisories, suggesting the need to engage this population about potential harm and behaviors that may increase health risk.

A proposed methodology to determine accuracy of location and extent of geographically isolated wetlands.

Wetlands can provide significant environmental benefits such as assimilation of pollutants, flood water storage, groundwater recharge, and fish and wildlife habitat. Geographically isolated wetlands (IWs) can provide the same benefits as other wetlands, but are particularly vulnerable to losses from urbanization and agriculture since they are isolated, often smaller, and not equal to other wetlands in regulatory protection. There is a need for a reliable assessment of the total number and area of IWs. Access to this information can provide the foundation to monitor IW loss, and can assist in understanding the ecological effects of such loss as well as help to address regulatory shortcomings. A probability sampling survey methodology that balances statistical considerations, expert opinion, and operational considerations is discussed for assessing the accuracy of IW maps. A simulation exercise was used to illustrate how the proposed sampling methodology will produce reliable results in map accuracy assessment. A wetland map for the Lockwood Folly River watershed, in Brunswick County, NC, was created using historical and recent data and used as the sampling frame in the simulation exercise. An updated wetland map for the same watershed, showing exact locations of wetlands, was used to provide "ground-truth" observations based on wetland delineations approved by the U.S. Army Corps of Engineers. Survey-based accuracy estimates were calculated by comparing site classification differences obtained by using both the original and updated wetland maps.