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›› 2015, Vol. 32 ›› Issue (3): 309-316.DOI: 10.7523/j.issn.2095-6134.2015.03.004

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Impact assessment and trend analysis of underground coal gasification on groundwater quality

CHEN Yawei, WANG Mingyu, LI Wei, WANG Huifang, WANG Shuping   

  1. College of Resources and Environment, University of Chinese academy of sciences, Beijing 100049, China
  • Received:2014-04-24 Revised:2014-06-04 Online:2015-05-15

Abstract:

The traditional approaches were used to assess the impact of underground coal gasification (UCG) on groundwater quality. The results show that all of those methods cannot reflect the groundwater pollution from UCG effectively, while the site influence index and single pollution index approaches work well. Sulfate, chlorine, dissolved solids, and volatile phenol were main pollution components. In addition, we study the long-term effects of sulfate in UCG of 3 years on downgradient aquifer by using numerical simulation, and the results predict that the effect time would not be less than ten years.

Key words: underground coal gasification, groundwater quality, environmental impact assessment, pollution forecast

CLC Number: