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Table 3. Data sets from application of the riverine HSI model for white suckers at St. Vrain Creek and Big Thompson River, Colorado (Propst 1982a). Variable Turbidity (JTU) pH ~issolved oxygen (mg/l) Temperature (adult/b juvenile) (0 C) V. Temperature (fry)b (0 C) V 5 Temperature c (spawning/embryo) (0 C) V6 Riffle velocity (spawning/embryo) (cm/sec) V7 Riffle depth (cm)e VB N o Spawntng substrate % cover % pools Component SI CWQ = C = R C = C HSI = Hygiene Data S I VI V2 a 1.00 7.8 1.00 Longmont Data SI a 1. DO 8.5 0.90 8.4 1. 0 12.0 0.70 12.0 0.35 10.0 0.65 0.9 d St. Vrain Creek RR Data a 1.00 8.3 0.95 8.4 1.00 13.5 0.80 13.5 0.45 10.0 0.65 1.00 d SI Gowanda Data 51 Mtn. View Data 51 4.1 1.00 8.0 1.00 10.6 1.00 14.0 0.80 14.0 0.48 10.0 0.65 0.85 d Sewage Data 51 7.11.00 7.8 1.00 7.4 1.00 13.0 0.75 13.0 0.45 10.0 0.65 1.00 d Big Thompson River Pond Johnstown Data 51 Data 51 7.7 1.00 8.5 0.90 8.0 1.00 16.0 0.90 16.0 0.60 10.0 0.65 1.00 d 16.0 1.00 8.5 0.90 10.0 1.00 19.0 1.00 19.0 0.80 10.0 0.65 1.00 d 0.85 V3 9.2 1.00 0.80 c 0.80 c a 1.00 8.8 0.83 8.8 1.00 20.0 1.00 20.0 0.85 10.0 0.65 1.00 c! c/d 0.90 0.3 0.15 8.9 0.21 0.80 0.48 0.18 0.41 c 16.8 0.45 0.0 0.00 0.75 0.45 0.23 0.43 0.80 c/d 0.90 6.0 0.20 26.5 0.70 c 0.80 2.0 0.10 5.0 0.10 0.90 0.65 0.10 0.39 aNo measurements were taken at these four sites on the St. Vrain Creek, but it is assumed that turbidity would be very close or the same as the turbidity in the Big Thompson River, which has 51's of 1.0. bTested as the same. cApril to June temperature measurements were only recorded at the St. Vrain River, Hygiene site, so it is assumed that the other sites also had early spring temperatures of 100 C. dNo direct measurements were taken for riffle velocity, but gradient (m/km) was taken at all sites. The gradients ranged from 1.5 to 9.1 m/km, with SI ratings of 1.0 to 0.95, respectively. From this information, it was assumed that the riffle velocities ranged from low to moderate, and were given SI ratings of 0.85 to 1.0. eNo riffle depth measurements were taken, thus the riffle depth variable was not included in this model. A 21.51.00 21.5 0.93 10.0 0.65 d Vg VIO c 37.6 0.95 10.8 0.26 VI2 1.00 0.65 0.61 0.74 80.0 0.9 10.0 0.25 0.70 0.35 0.58 0.35 15.0 0.43 25.0 0.63 0.80 0.45 0.53 0.58 0.80 a/b 0.30 0.0 0.1 6.6 0.15 0.83 0.30 0.13 0.30 .~ 0.90 0.60 0.45 0.63 .