WIT Press


Higher Order Explicit Schemes For BOD-DO Modelling In Open Channels

Price

Free (open access)

Volume

52

Pages

10

Published

2002

Size

414 kb

Paper DOI

10.2495/HY020281

Copyright

WIT Press

Author(s)

R. I. Patel & R. Misra

Abstract

This paper introduces a methodology for developing higher order explicit schemes for the solution of two coupled, one dimensional transport equation describing advection, dispersion and kinetics processes for BOD and DO modeling in open channels. Based on the proposed methodology, four new higher order schemes namely second order nodal, second order cell centered, third order nodal and third order cell centered are developed. Transport of BOD resulting in DO deficit with exponentially decaying BOD input as an upstream boundary condition is simulated with the developed schemes. Results of the proposed schemes are compared with analytical solution for BOD and convolution integral solution for DO. Proposed schemes accurately simulate BOD-DO profiles for the case under consideration.

Keywords