DEVELOPMENT AND EVALUATION OF NUMERICAL HYDRODYNAMIC MODELS FOR SMALLLAKES AND RESERVOIRS

Citation
Vc. John et al., DEVELOPMENT AND EVALUATION OF NUMERICAL HYDRODYNAMIC MODELS FOR SMALLLAKES AND RESERVOIRS, Canadian journal of civil engineering, 22(2), 1995, pp. 270-282
Citations number
13
Categorie Soggetti
Engineering, Civil
ISSN journal
03151468
Volume
22
Issue
2
Year of publication
1995
Pages
270 - 282
Database
ISI
SICI code
0315-1468(1995)22:2<270:DAEONH>2.0.ZU;2-F
Abstract
The response of a small lake or reservoir system to wind and streamflo w forcing is examined in this paper using a numerical model based on N avier-Stokes equation and a numerical hydraulic model using the segmen t-node approach. The main mass transport in the lake has been found to be due to wind; the circulation caused by stream inflow and outflow o f the lake contributes a relatively small fraction of the total transp ort. The above-mentioned models have been applied to different wind re gimes and constant or variable inflow-outflow conditions of Long Lake (Nova Scotia). Comparisons are made between observed data and model re sults by both models. The model response has also been studied for gen eration of seiches and wind setup in the lake; and the response of the lake to these forcing functions has been presented. The comparison of model results with in situ field data establishes model's suitability to make predictions. Drogue and water level measurements were made at a number of locations in the Long Lake to validate the numerical mode ls. The results from the numerical simulation using the two models com pare favourably with the observed data. As may be expected, the segmen t-node modelling scheme was found to be computationally more efficient and relatively easy to run on a personal computer.