After two summers, DTU temperature sensors show trout friendly water temperatures.
Amateur analysis by John Davenport, Chair of DTU DSP Temperature Sensing.
Interesting results from this graph and fishing in the Denver South Platte this summer indicate:
- During runoff the temperature out of Chatfield was nice and cool. Clear Creek just upstream of 88th Ave was adding cool water to the Denver South Platte.
- As soon as runoff stopped, 88th Avenue and Cuernavaca both got warmer but stayed about the same. Then in August 88th Ave got about 4 degrees warmer than Cuernavaca.
- Chatfield warmed up because flows were cut from the dam in mid September. At that point the temperature at Chatfield matched that at 88th Ave about 30 miles away.
- Diurnal swings (day-night) in temperature and available deep water could be what keeps the Denver trout happy. The trout seek out cool (below 75 degree) temperatures for only a few hours a day. With good deep habitat this is no problem for them. This probably explains why there are happy, healthy, swiftly growing trout between Chatfield and Confluence Park but few found toward 88th Ave where the South Platte flattens out and cool channels are minimal.
- That precipitous 20 degree drop in mid May was the storm of baseball sized hail that destroyed my roof.
These fish caught during the temperature sensor readings appear quite healthy and well fed.
First Full Year DSP Temperature Analysis of Denver Trout Unlimited’s 24×7 temperature sensors shows trout friendly water.
Ronnie and Rhys’s trout survive and thrive the short term temperature peaks precisely because they have fish passage, deep pools, shaded structures, cool water seepage, park land irrigation runoff, and the diurnal (day/night) temperature swings. Making sure that trout will have deep pools and shaded structures below the water line is precisely why Denver Trout Unlimited has invested so much time, and effort on studies, meetings, and raising funds for enhanced flows from the Chatfield Environmental Pool. ...read more
South Platte Temperatures – An analysis by Steven Reeves, Metro State Student 1/2017 I began looking at monthly averages and mapping the point off of that. I found one pattern that interested me and took a further look at … Continue reading
Preliminary temperature monitoring results are in.
Full Year Temperature Monitoring chair declares ,”Ha, we do have a trout fishery.”
Whether his pronouncement is shared by others only time will tell, but check out the comparison to the world class trout fishery flowing through Pueblo on an hour by hour basis this August.
DSP vs Pueblo results
At present, the Denver South Platte has just one full year temperature monitoring site in Englewood. DTU would like to add at least 6 more to help with the management of this improving fishery.
Check the South Platte Project tab for more information on this project.
Current Status 3-page.pdf
Tidbit Temperature sensor in 2″ ABS cap w/plug.