Modelling the influence of thermal discharge under wind on algae. (2015)

• Record Type: Journal Article
• Authors: Feng, Le; Chen, Bin; Hayat, Tasawar; Alsaedi, Ahmed; Ahmad, Bashir
• Is Part Of: Physics and chemistry of the earth. Volume 79/82(2015)
• Page Start: 108
• Page End: 114
• Publication Date: 2015
• Subjects: Thermal discharge -- Wind speed -- Numerical simulation -- Algae -- Bacillariophyta; Geophysics -- Periodicals; Geochemistry -- Periodicals; Earth sciences -- Periodicals; Geodesy -- Periodicals; Astrophysics -- Periodicals; 550
• DOI: 10.1016/j.pce.2014.12.003
• Languages: English
• ISSNs: 1474-7065

Abstract

Highlights: The temperature rising areas were simulated under different wind speed conditions. The variation of Chl.a concentration was illustrated from time series samplings. The relationship between algae biomass and temperature rise was presented. Abstract: Wind-driven processes exert an important impact on aquatic ecosystems, especially on shallow reservoirs. Flow and heat transport under wind in the Douhe reservoir in China were simulated by a two-dimensional mathematical model. Areas corresponding to different temperature rises were calculated for different wind speed conditions with high frequency. It is shown that high temperature rise areas increase for maximum wind speed conditions while low temperature rise areas keep constant for various wind speed conditions. The concentration of Chl.a decreases with the increase of wind speed, indicating that low wind speed is suitable for algae blooming in the Douhe reservoir. The effects of wind on Bacillariophyta biomass growth become more obvious with the increase of temperature rise areas. The influenced areas of lower temperature rise (0.2–1.49 °C) and higher temperature rise (1.5–2 °C) zone are 8.57 × 10 6 m 2 and 5.18 × 10 6 m 2, respectively, and corresponding total variation amounts of Bacillariophyta biomass are 2.24 × 10 5 /m 2 and 0.42 × 10 5 /m 2, respectively. Results show that wind has a significant impact on ecological effects due to thermal discharge from thermal power plant into shallow reservoirs.