VARIABLE-PARAMETER MUSKINGUM-CUNGE METHOD REVISITED

This paper re-examines the variable-parameter Muskingum-Cunge method. Numerical experiments show that the loss of mass is small but percepti ble throughout the wide range of peak inflows tested, from 200 to 1000 cfs ft(-1) (18.58-92.9 m(2) s(-1)). Modified three-point direct and f our-point iterative variable-parameter methods are introduced. These m ethods have better mass conservation properties than comparable conven tional methods. In practice, the small loss of mass experienced by the variable-parameter methods does not appear to constitute a significan t drawback.