In: Physics
A stage-discharge relationship is an inexpensive tool for obtaining continuous records of river discharge. Using sketches, describe what you understand by a stage-discharge relationship and how it fills the role of a cheap alternative for continuous river flow measurement. What precautions must be taken in the long-term use of stage-discharge relationships?
(c) Describe the dilution gauging method, emphasising the main differences between constant rate injection and gulp injection techniques. Starting from the basic mass balance equation, derive the equation for estimating river discharge using the constant rate injection method. What precautions must be taken when using the dilution gauging method?