critFlowQ: Infer discharge based on critical flow theory

critFlowQ: Infer river discharge from remotely sensed data based on critical flow theory

This standalone executable function provides a means of inferring river discharge from remotely sensed data based on critical flow theory. This approach is only applicable to rivers with well defined standing waves and involves measuring their wavelength and the width of the channel. These data are then used to calculate flow velocity, water depth, and river discharge based on an assumption of critical flow. The function calcCritFlowQenables batch calculation of critical flow-based discharge estimates from measurements of wavelength and width made in Google Earth.