Back to Search
Start Over
A new methodology for determining dispersion coefficient using ordinary and partial differential transport equations
- Source :
- Water Science and Technology. 59:2197-2203
- Publication Year :
- 2009
- Publisher :
- IWA Publishing, 2009.
-
Abstract
- The present study proposes a methodology for determining the effective dispersion coefficient based on the field measurements performed in Gwangju (GJ) Creek in South Korea which is environmentally degraded by the artificial interferences such as weirs and culverts. Many previous works determining the dispersion coefficient were limited in application due to the complexity and artificial interferences in natural stream. Therefore, the sequential combination of N-Tank-In-Series (NTIS) model and Advection-Dispersion-Reaction (ADR) model was proposed for evaluating dispersion process in complex stream channel in this study. The series of water quality data were intensively monitored in the field to determine the effective dispersion coefficient of E. coli in rainy day. As a result, the suggested methodology reasonably estimates the dispersion coefficient for GJ Creek with 1.25 m2/s. Also, the sequential combined method provided Number of tank-Velocity-Dispersion coefficient (NVD) curves for convenient evaluation of dispersion coefficient of other rivers or streams. Comparing the previous studies, the present methodology is quite general and simple for determining the effective dispersion coefficients which are applicable for other rivers and streams.
- Subjects :
- Hydrology
Korea
Environmental Engineering
Field (physics)
Series (mathematics)
Chemistry
Sequential combination
Soil science
STREAMS
Models, Theoretical
Dispersion coefficient
Diffusion
Rivers
Dispersion (optics)
Escherichia coli
Water Movements
Partial derivative
Water Pollutants, Chemical
Combined method
Environmental Monitoring
Water Science and Technology
Subjects
Details
- ISSN :
- 19969732 and 02731223
- Volume :
- 59
- Database :
- OpenAIRE
- Journal :
- Water Science and Technology
- Accession number :
- edsair.doi.dedup.....650b5cc8998149466d113b40656bfa10