2/9/2022 0 Comments Is flume freeIn the case of a weir, the water depth is measured behind the weir and weir equations (discussed in detail below) convert depth to an estimated discharge over the weir. Bureau of Reclamation 2001).Īll the discharge measurement principles listed above require a measurement of water depth and a known channel (or pipe, etc.) geometry to calculate discharge. For further discussion of individual factors, see Chapter 4 in the “Water Measurement Manual” (U.S. Selection of a discharge measurement method is dependent on many factors, including accuracy, cost, range of discharge, and site conditions. The potential measurement uncertainty in roughness coefficient, however, is large, and it is recommended that Manning’s equation be used only as a last resort to estimate discharge in stormwater applications.
#Is flume free free#When used to estimate discharge, the water depth is measured at some distance from a control (such as weir or free outfall) and other variables are either calculated or measured.
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