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In this paper a one - dimensional hydraulic model for katabatic winds in Tehran is presented.
Such winds, considering low-level inversions in urban areas, have important effects on air
pollution transport. The inputs of the model is acquired from climatic observations for this area. The model although simple, predicts the properties of the local winds within acceptable levels.
The maximum speed in its vertical profile occurs at about 1/4 of the depth of the katabatic wind.
The wind speed and temperature profiles of the flow are time dependent