[Numerical simulation on hydrodynamic character for algae growth].
In order to quantificationally study the direct effects of hydrodynamic condition on the growth of algae, the Microcystis aeruginosa was chosen to carry through the disturbance-experiment. By keeping the same value of illumination, temperature and nutrition and changing the rotate speed of oscillator, the growing processes of algae under different disturbance intensities were researched. The hydraulic parameter was presented to amend the formula for the growth of algae. Take Neijiang as an example. A 2-D unsteady model for algae growth was established to forecast the scope of water blooms in Neijiang. It is found that the growth of algae is obviously influenced by hydrodynamic condition, and a condign low velocity is beneficial for its growth while both the quiescence condition and high velocity will restrain its growth rate. After the close of the water gate in Leading Channel, the velocity in Neijiang will be decreased, which accelerated the growth rate of algae, and the area of water blooms will be increased to 2.5 km2 which is about 36.8 percent of the total water surface area of Neijiang. Under the quiescent condition and the improved hydrodynamic condition, the growth rate of algae will be effectively controlled and the area of water blooms will be reduced to 0.78 km2 and 0.18 km2 respectively.
Wang
Hua
H
College of Environmental Science and Engineering, Hohai University, Nanjing 210098, China. wanghua543543@163.com
Pang
Yong
Y
D002681:China; D004784:Environmental Monitoring; D056890:Eukaryota / Q000254:growth & development*; D005068:Eutrophication; D046931:Microcystis / Q000254:growth & development; D008954:Models, Biological; D045483:Rivers; D014872:Water Movements; D014873:Water Pollutants / Q000032:analysis* / Q000737:chemistry
D014873:Water Pollutants