CCR Nutrient Balance
Highlights:
In WY 2021, phosphorous and nitrogen in the Reservoir increased by approximately 4,700 and 32,600 pounds, respectively, similar to 2020 but less than the historical average.
Cherry Creek contributes the majority of phosphorus and nitrogen loading to the Reservoir due to its relatively high flow. In WY 2021 Cottonwood Creek was responsible for over 24% of the nitrogen loading although it contributed only 18% of the flow to the Reservoir.
Relative Percentage of Inflows into Cherry Creek Reservoir WY 2021
Phosphorus and nitrogen loading to the Reservoir results from surface water from Cherry and Cottonwood Creeks, precipitation and alluvial groundwater. The water quality from the monitoring sites closest to the Reservoir are used for the calculations for each of the inflow sources.
Total Flow-Weighted Nutrient Concentrations
| Water Year | Total Phosphorous | Total Nitrogen |
|---|---|---|
| WY 2011-2020 | 200 ug/l | 1,344 ug/l |
| WY 2020 | 173 ug/l | 1,491 ug/l |
| WY 2021 | 176 ug/l | 1,420 ug/l |
Useful Links
Nutrient Loading
info_outlineCherry Creek contributes the majority of both phosphorus and nitrogen to the Reservoir.