Contaminant transportation characteristics of Gehongdao gold mine tailing-dam in Gansu province
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Abstract:
The contaminant seepage problem of tailing-dam is an important factor affecting the safety of ground water of the tailing-dam, so accurately understanding the rules of the tailing-dam seepage and contaminant transportation in the tailings is great significance to the prevention of groundwater pollution. According to the seepage theory and the conditions of steep valley, large elevation difference, and tilted aquifer, a hydrogeological generalized model of tailing-dam based on horizontal multilayer subdivision was established，while Visual Modflow (MT3DMS) was used to analyze the transportation characteristics of ammonia nitrogen in the groundwater in the study area. The results indicated that ammonia nitrogen migration direction was consistent with groundwater flow direction, and ammonia nitrogen concentration decreased with the increase of the migration distance.
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