Author(s): K. Keshava Murthy; C. Rangaraj; M. N. Sheshaprakash
Linked Author(s): K. Keshava Murthy
Keywords: No Keywords
Abstract: This paper presents. a practical exponential weir of simple geometric shape formed by quadrants of a circle of radius R. The flow through this weir of half width t and altitude R for flows above a threshold depth is proportional to the exponential power of head h, in the range of 0.55 R≤hs R within a maximum percentage deviation of +2 from the exact theoretical discharge. The exponential relationship between the discharge and head is determined based on numerical optimization procedures. Nearly 45% of the weir can be used effectively as the measuring range. Experiments with one typical weir show excellent agreement with the theory by giving a constant average Ca of 0.62. The use of the weir in measurement of flood discharges is highlighted.
Year: 1993