Table 1: Landscape attribute classification criteria.

Landscape attributeClassification metricsCriteria

Stream sizeDrainage area (km2)<100100–3000>3000
Small streamsLarge streams/small riversLarge rivers

Stream qualityAnthropogenic pressure from land use, roads, and railroads (%)No urban areas, no agricultural areas, no roads, and no railroads within 30 m buffer0–5% urban areas or 0–40% agricultural areas or summed roads or railroads less than half the length of stream within 30 m buffer>5% urban areas or >40% agricuIturaI areas or summed roads or railroads ≥ half the length of stream within 30 m buffer

IntactModifiedHighly altered
Water qualityTotal , total , suspended sedimentStream segment is above EPA criteria thresholds for all three pollutantsStream segment is below EPA criteria threshold for any of the three pollutants
Suitable water qualityDegraded water quality