Stream Temperature Prediction Model

Given certain meteorologic and hydraulic‐hydrologic data a dynamic deterministic one‐dimensional model, based on evaluation of the heat exchange across the air‐water interface, predicts the water temperatures of streams. The model itself is a quasilinear partial differential equation that represents an abbreviated energy conservation equation. For an extended upper reach (200 miles) of the Columbia River during July 1966, it has predicted water temperatures on the average within 0.3°F. More important, this model has been subjected to a statistical validity test which indicates a certain level of acceptance.