State of Mission Creek

Mission Creek is the largest stream flowing into Okanagan Lake. This explorer shows the creek's water budget from a computer model of the watershed (Raven), checked against stream gauges. All numbers come from committed model results and are drafts.

1 GL (gigalitre) is one billion litres, or one million cubic metres.

Pages

• Inflow to Okanagan Lake: the yearly inflow and its uncertainty range, today and under climate change.
• Water budget: where the water goes, including the alluvial fan, withdrawals and transfers across the watershed divide.
• Flows for fish: days below the environmental flow needs for rainbow trout and kokanee.
• Climate scenarios: August flow, kokanee spawning flows and water demand to 2100.
• Full licensed use: what changes if every water licence were used in full.
• Land, forests and fire: land cover, crops, logging, fire and vegetation.
• Gauges and model skill: how well the model matches the gauge, and its known limits.
• Data, licence and attribution.

How to read this site

• Results are from one working model. Its version is printed at the top of every page.
• Each number has a source: a committed result file and, where one exists, a decision-log entry (for example F80). The table at the foot of each page lists them.
• Confidence levels (High, Moderate, Low) are those stated in the decision log.
• The model reproduces annual volumes at the gauge but overestimates summer flow (see model skill). Summer results are therefore optimistic.