One-Dimensional Analysis of Floods and Tides in Open Channels

Abstract

The one-dimensional equations of gradually varied, unsteady flow in open channels are integrated to obtain stages and discharges along a river subject to tides and floods. An explicit procedure in finite differences is used, considering branches, independent tributaries (pumps), contractions due to bridges or barriers, with or without tidal gates and flood plains restricted or not by levees. The boundary conditions may be represented by: tides at both ends; tides at one end and discharge at the other; surge or stage hydrographs at any station; and combinations of the previous conditions. Three examples are presented covering a wide range of conditions.