An approximate method for 1-D simulation of pollution transport in streams with dead zones

Title:

An approximate method for 1-D simulation of pollution transport in streams with dead zones

Creator:

Sokáč, Marek, Velísková, Yvetta, and Gualtieri, Carlo

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:e49f0fdc-7618-4054-8b61-d3cb37cb8a00
uuid:e49f0fdc-7618-4054-8b61-d3cb37cb8a00
doi:10.2478/johh-2018-0035

Subject:

environmental hydraulics, river pollution, hydrodynamic dispersion, longitudinal dispersion, and dead zones

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Analytical solutions describing the 1D substance transport in streams have many limitations and factors, which determine their accuracy. One of the very important factors is the presence of the transient storage (dead zones), that deform the concentration distribution of the transported substance. For better adaptation to such real conditions, a simple 1D approximation method is presented in this paper. The proposed approximate method is based on the asymmetric probability distribution (Gumbel’s distribution) and was verified on three streams in southern Slovakia. Tracer experiments on these streams confirmed the presence of dead zones to various extents, depending mainly on the vegetation extent in each stream. Statistical evaluation confirms that the proposed method approximates the measured concentrations significantly better than methods based upon the Gaussian distribution. The results achieved by this novel method are also comparable with the solution of the 1D advection-diffusion equation (ADE), whereas the proposed method is faster and easier to apply and thus suitable for iterative (inverse) tasks.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Journal of hydrology and hydromechanics | 2018 Volume:66 | Number:4

Harvested from:

CDK

Metadata only:

false