Simulation of Water Temperature by Using Urban Lake Temperature Model

Abstract

Water temperature models of urban lakes may fail to reproduce thermal characteristics if the reduction of wind field attributable to sheltering along the banks is not considered. To quantify the effect of wind sheltering, a new wind sheltering (WST) model was developed and coupled with a vertical heat conduction model to create an urban lake temperature model (ULTM). Based on the relationship between the wind direction and obstacle location, as well as the characteristics of wind variation downwind from the obstacle, the WST model could calculate a time-dependent wind sheltering coefficient (Wstr) to dynamically adjust the wind data for the water temperature model. The proposed model was verified using measurements from Guozheng Lake (central China), and good consistency was reported. The results showed that the enhanced modeling system when combined with the proposed WST model was an effective tool for temperature simulation.