| ATTRIBUTE | VALUE |
|---|
| type | A |
| database id | 3888 |
| title | Numerical simulation of the biochemical oxygen demand and dissolved oxygen in the channels network |
| authors | Romuald Szymkiewicz, Kazimierz Burzyński |
| affiliations | |
| pages | 3 — 22 |
| full text link | http://www.ibwpan.gda.pl/storage/app/media/ahem/ahem44no14str003.pdf |
| abstracts | The paper deals with modelling of two indicators characterizing oxygen conditions of a river, which are: biochemical oxygen demand (BOD) and dissolved oxygen (DO). To describe the evolution of these two indicators, advection-diffusion transport equations are used. To solve these equations the decomposition technique is proposed. This approach enables the splitting up of the advection-diffusion equation into parts and independent solving of both parts in each time step. The advection equation is solved by the characteristics method with the spline function used in interpolation. To solve the diffusion equation the finite-elements method with the Crank-Nicolson scheme to integrate in time is applied. The proposed method ensures very small numerical errors. The method was tested using the known analytical solution and the results of measurements for the Reda river. |
| attributes | [reviewed] [scientific] |
| language | en |
| PART OF |
|---|
| type | C |
| database id | 3834 |
| year | 1997 |
| series | Archives of Hydro-Engineering and Environmental Mechanics |
| issue | Vol. 44, No. 1-4 |
| publisher | Wydawnictwo IBW PAN |
| place | Gdańsk |