Table 1: Landscape attribute classification criteria.

Landscape attribute Classification metrics Criteria Stream size Drainage area (km2) <100 100–3000 >3000 Small streams Large streams/small rivers Large rivers Stream quality Anthropogenic pressure from land use, roads, and railroads (%) No urban areas, no agricultural areas, no roads, and no railroads within 30 m buffer 0–5% 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 Intact Modified Highly altered Water quality Total , total , suspended sediment Stream segment is above EPA criteria thresholds for all three pollutants Stream segment is below EPA criteria threshold for any of the three pollutants Suitable water quality Degraded water quality