Simulation on water quality of reservoir at construction phase by pollutant release from oxidation of waste rocks rich S and Fe

• DOI: 10.1016/j.eti.2022.102860
• Publication Date: 2022-08-05T16:45:34Z
• Authors: Ya Gao; Feipeng Li; Lingchen Mao; Nanxia Yan; Changkang Peng; Hong Tao; Daofang Zhang
• Keywords: Dilution; Acid Mine Drainage

The presence of sulfur and iron in waste rocks produced during reservoir construction can generate acid rock drainage (ARD). Its environmental impact however, has often been neglected. Therefore, lab experiments were firstly conducted to simulate the release main pollutants when having submerged at bottom a Guizhou Province, China. released on water quality impounding was then predicted by two-dimensional model MIKE21 coupled with ECO Lab module. Results showed that argillaceous mainly sulfate through oxidation. Based experiment, suggested average concentrations TP, SO42-, Fe3+ peaked rapidly cross section about 100 m downstream yards level reached 855 m. At this point, concentration exceeded standards drinking source remained for 6 days, while TP 60 days. would meet because dilution effect above 883 However, phosphate from combined cycles "P-Fe-S" should be paid more attention impoundment. simulation results existing actual cases, it anaerobic environment caused impoundment significantly reduce negative ARD. study provide new insight stacking engineering risk assessment under construction.