I don't think they use as much water as you.
Mr. Lunn, you're telling us that you only use 1% of the water. That's interesting. You justify what you're doing by talking only about the water you use directly. You consider that what you use directly is the only cause of reductions in river water.
However, the oil sands contribute to greenhouse gases, which directly cause climate change. Furthermore, Alberta, because of the oil sands, produces 43% of the greenhouse gases emitted by Canada as a whole. Those greenhouse gases have a direct impact on the quantity of water in the Alberta basins and even further, and you don't consider the effect of the production of greenhouse gases when you try to assess what in your activities contributes to reducing the quantity of water in the Athabasca River and other rivers!
Why do you consider only what you take out of the river?