Keywords

Curtain weirs (CWs), Three Gorges Reservoir (TGR), Xiangxi Bay (XXB), Algal blooms, CE-QUAL-W2.

Start Date

25-6-2018 10:40 AM

End Date

25-6-2018 12:00 PM

Abstract

Curtain Weirs (CWs) is a hydraulic structure which acts as a barrier to flow and diffusion of heat across the width of the water body. Algal blooms occurred frequently in Xiangxi Bay (XXB), one of the largest tributaries of the Three Gorges Reservoir (TGR). A laterally averaged two-dimensional hydrodynamic and water quality model (CE-QUAL-W2) was used to simulate the curtain weirs including hydrodynamics and chlorophyll-a concentrations in XXB. The developed model was calibrated using data collected in XXB from January to December in 2010. Results indicated that the maximum chlorophyll-a concentrations were observed 154 mg/m3 according sampling sites such as XX09, XX06 and XX01 respectively. Performance of the CWs suggests that overall chlorophyll-a concentrations were markedly reduced between 30-85% as a function of floating curtain weirs height and locations. Therefore, the proposed curtain weirs can be a possible way to reduce algal blooms and improve water quality in XXB of TGR.

Stream and Session

Stream D: Modeling Environmental Fate of Contaminants, Human Well-being and Public Health,

Session D1: Environmental Fluid Mechanics – Theoretical, Modelling, and Experimental Approaches

COinS
 
Jun 25th, 10:40 AM Jun 25th, 12:00 PM

Modelling Curtain Weirs and its Effects on Controlling Algal Blooms in a Subtropical Reservoir of China

Curtain Weirs (CWs) is a hydraulic structure which acts as a barrier to flow and diffusion of heat across the width of the water body. Algal blooms occurred frequently in Xiangxi Bay (XXB), one of the largest tributaries of the Three Gorges Reservoir (TGR). A laterally averaged two-dimensional hydrodynamic and water quality model (CE-QUAL-W2) was used to simulate the curtain weirs including hydrodynamics and chlorophyll-a concentrations in XXB. The developed model was calibrated using data collected in XXB from January to December in 2010. Results indicated that the maximum chlorophyll-a concentrations were observed 154 mg/m3 according sampling sites such as XX09, XX06 and XX01 respectively. Performance of the CWs suggests that overall chlorophyll-a concentrations were markedly reduced between 30-85% as a function of floating curtain weirs height and locations. Therefore, the proposed curtain weirs can be a possible way to reduce algal blooms and improve water quality in XXB of TGR.