Iliamna Lake Stream Surveys


Overview

During the 2013 and 2014 field seasons at Iliamna Lake we conducted a stream survey project which allowed us to gather detailed measurements on streams within Iliamna Lake. We collected various measurements in streams along Iliamna Lake, from Lower Talarik Creek on the northeastern shore to Chinkelyes Creek, a tributary of the Iliamna River, at the east end of the lake.

Data collected has mainly included physical measurements such as stream width, substrate particle measurements, stream flows, and gradient, as well as summarizing stream characteristics such as canopy cover, bank stability, large woody debris presence, embeddedness of the substrate, bank vegetative protection, turbidity, and fish observations for the particular survey date. In addition to our measurements we also deployed temperature loggers at each of the sites we surveyed which are set record water temperature at regular intervals throughout the year and we continuously retrieve them the following field season.

The following table contains the summary results of our surveys throughout the 2013 and 2014 surveys.

Stream Name Survey Date Approx. Distance Surveyed (km) Avg. Substrate (mm) Avg. Gradient (% Slope) Avg. Width (m) Avg. Depth (m) Discharge C.M.S. Avg. Conductivity (us/cm) Median pH
Knutson Creek 7/28/2013 2.375 134.70 -1.89 13.44 0.378 2.41 14.6
Mink Creek 7/31/2013 2.250 29.55 -0.90 3.65 0.161 0.09 32.5 6.90
Russian Creek 8/11/2013 3.600 106.68 -2.08 4.28 0.140 0.14 57.7 7.92
Lonesome Bay Creek 8/14/2013 1.326 102.84 -2.91 6.18 0.240 0.78 18.4 7.25
Unnamed Creek 8/16/2013 1.700 24.14 -0.29 5.58 0.188 0.20 7.62
Canyon Creek 8/17/2013 5.000 38.91 -0.77 14.57 0.327 2.53 24.1 7.33
Chinkelyes Creek 8/28/2013 2.584 46.14 -0.30 20.34 0.425 2.30 12.9 7.27
Iliamna River 8/28/2013 6.970 Mostly sand -0.04 64.41 0.558 11.54 15.2 6.99
Pile River 8/29/2013 4.630 Silt to cobble -0.10 39.63 0.492 16.31 17.9 6.86
Roadhouse Creek 7/17/2014 5.000 34.87 -0.40 4.06 0.389 0.69 48.0 7.82
NE Eagle Bay Creek 7/18/2014 4.965 39.51 -0.69 5.34 0.207 0.29 54.8 8.03
NW Eagle Bay Creek 7/19/2014 4.522 24.76 -0.28 5.95 0.595 0.57 67.4 7.94
Car Creek 7/21/2014 4.826 22.93 -0.55 11.63 0.594 0.68 36.4 7.73
Pete Andrew Creek 7/22/2014 5.842 28.52 -0.59 6.72 0.213 0.56 31.8 7.82
Unnamed Creek (West of Pete Andrew Creek) 7/23/2014 2.280 24.85 -0.69 2.22 0.236 0.10 36.0
Middle Talarik Creek 7/24/2014 4.750 23.25 -0.58 7.37 0.188 0.58 29.1 8.03
Upper Talarik Creek 7/26/2014 6.954 38.65 -0.70 18.39 0.973 6.01 51.0 7.96
Lower Talarik Creek 7/27/2014 5.400 36.91 -0.61 22.29 0.301 3.50 48.1 8.55
Young’s Creek 8/2/2014 4.750 22.92 -0.29 9.41 43.5 7.93