Figure 9 . Difference between the Snake and Imnaha Rivers, 1991-1997. Positive numbers indicate the Snake River is warmer. Figure 10 . Difference between the Snake and Salmon Rivers, 1991-1997.
Positive numbers indicate the Snake River is warmer.
Figure 11 . Temperature difference between RM 192 and RM 180, 1991-1997. Positive values indicate river warming. To quantitatively understand the Snake River heat budget and characterize the effect of flow from Hells Canyon Dam on the downstream water temperature, a simplified heat budget model can be applied. The model considers atmospheric heating and cooling, and mixing of temperatures from the tributaries that flow into the Snake River.