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Scientific Investigations Report 2009–5015

U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2009–5015

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Table 3. Description of datasets used for evaluation of the U.S. Geological Survey perennial streams model for Idaho.

[Abbreviations: IDEQ BURP, Idaho Department of Environmental Quality Beneficial Use Reconnaissance Program; EMAP, Environmental Monitoring and Assessment Program; USGS, U.S. Geological Survey; ft3/s, cubic foot per second; GIS, geographic information system; <, less than]

Dataset Dates of field visits Classification method Number of sites
No. Source Name
1 Idaho Department of Environmental Quality IDEQ BURP Summer/autumn 1993–2006 Streams were coded perennial if measured flow during field visits was greater than or equal to 0.1 ft3/s; otherwise, streams were coded intermittent. 1,804
2 U.S. Environmental Protection Agency EMAP office No dates; determinations made in 1999 Made using several office-based approaches, including examining maps and GIS coverages and talking to regional biologists and State employees with knowledge of the area. No field visits. 114
3 U.S. Environmental Protection Agency EMAP field Summer/autumn 2000–2003 Streams were coded perennial if enough water was present to sample during field visits; otherwise, streams were coded intermittent. 123
4 U.S. Geological Survey USGS low flow Throughout year 1945–2001 Field visits made throughout the year, but mostly in summer/autumn. Sites were used for model comparison only if site was dry, water was pooled, or measured flow was <0.1 ft3/s (to be comparable with BURP sites). Sites selected were considered intermittent. 207

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