Abstract: An overview of nonlinear regression is presented based on the concept of model linearization and use of successive approximations in order to minimize the sum of squared residuals. The Marquardt method is proposed as a ...

Abstract: The problem of solute-mass transport in natural streams is tackled via a governing equation that employs the cumulative discharge, instead of the transverse distance, as an independent variable thus eleminating the need ...

Abstract: The problem of seepage from unlined surface canals or elongated ponds was investigated. Seepage from single or interacting canals has been computed for a variety of boundary conditions at the bottom of the seepage layer. ...

Abstract: A novel landfill leachate liner design consisting of a series of vshaped contiguous elements constructed from an impervious membrane, a boxed soil layer saturated with clean water, and a gravel layer is proposed. Certain ...

Abstract: A mathematical model for the generation and transport of solute contaminants through a solid waste landfill is presented. The governing equations are solved numerically by the method of lines. A sensitivity analysis of the ...

Abstract: The gravity and wind‐driven flow in a river impoundment is simulated using a network of interconnected channels. The forcing wind is specified by a step‐function, and the response is calculated by quasi‐steady state ...

Abstract: The hydraulics of drainage and seepage for a sloping landfill leachate collection system were investigated. A transient liquid balance equation was developed and solved numerically. A dimensionless form of the model was ...

Abstract: A method has been proposed for the computation of the transverse mixing coefficient in wide and shallow rivers. The study addresses the flow regime where vertical mixing has been completed. The method makes use of the ...

Abstract: A simulation of dissolved oxygen (DO) dynamics and of biomass is incorporated in a dynamic wind and gravity driven hydrologic transport model. Quantitative expressions are given for the source and sink terms describing ...