1 / 20

Sustainable Groundwater Resource Management in Estonian Oil Shale Deposit

Sustainable Groundwater Resource Management in Estonian Oil Shale Deposit. Helena Lind Jüri R. Pastarus Tallinn University of Technology, Department of Mining Kalmer Sokman and Erik Väli Estonian Oil Shale Mining Company ( Eesti Põlevkivi ) Riho Iskül Kunda Nordic C ement Company.

matia
Download Presentation

Sustainable Groundwater Resource Management in Estonian Oil Shale Deposit

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Sustainable Groundwater Resource Management in Estonian Oil Shale Deposit Helena Lind Jüri R. Pastarus Tallinn University of Technology, Department of Mining Kalmer Sokman and Erik Väli Estonian Oil Shale Mining Company (Eesti Põlevkivi) Riho Iskül Kunda Nordic Cement Company

  2. Content of the presentation • Sustainability • Is the groundwater resources management sustainable? • Problems and impacts of oil shale mining • Environmental taxes • Are we sustainable? • Can we be more sustainable? • Conclusion TUT Mining Department

  3. Sustainability • Water quality, resource and environmental diversity remains while groundwater is used • We predict the impacts in advance and use the best possible technological solutions • Long term development TUT Mining Department

  4. Impacts of the oil shale mining • The main impact to the environment during mining and after mining: • change of water regime: decreasing & increasing waterlevel • change of groundwater chemical components TUT Mining Department

  5. Hydrogeological and mining conditions • Mines next to closed and water filled areas • Oil shale outcrop area TUT Mining Department

  6. Dewatering: pumping stations TUT Mining Department

  7. Dewatering: pumping rate Pumping rate at 2006 was 155 million m3 Precipitations 555 mm TUT Mining Department Data: Estonian Oil Shale Company

  8. Dewatering: pumping rate per produced tonnage Data: Estonian Oil Shale Company TUT Mining Department

  9. Pumped mine water Analyse of 2006: • 50-90% precipitations • Recirculating water – water from closed mines • Groundwater Methodology of analyse: Reinsalu, E (2005). Changes in mine dewatering after the closure of exhausted oil shale mines. Oil Shale, 22(3), 261 - 273 TUT Mining Department

  10. Changes in watertable • Water level decreases TUT Mining Department

  11. Water quality: microcomponents of water in mine Data: Reinsalu, E; Valgma, I; Lind, H; Sokman, K (2006). Technogenic water body closed oil shale mines. Oil Shale, 23(1), 15 - 28. Estonian Oil Shale Company TUT Mining Department

  12. Legislation • Environmental taxes are increasing every year: TUT Mining Department Data: Estonian Oil Shale Company

  13. Environmental taxes and sustainability • Increasing environmental taxes has incentive effect: • use new mining methods and technology, • new environment protective technologies (infiltration dams) • to pump out less groundwater • to clean the water • To be more effective, decrease losses -> to decrease usage of nature resources -> to decrease influence on environment and society (nearby living people) TUT Mining Department

  14. Resources management • To understanding thebehaviour of a groundwater system and its interaction with the environment is nessesary to have a sustainable management plan • Mathematical models supportedby field information have a key role in assessing the future behaviour of a systemto find effective operating conditions for sustainable development andmanagement groundwater resources. TUT Mining Department

  15. Groundwater modelling TUT Mining Department

  16. Are we sustainable? • Watertable recovers within 2 to 5 years after the pumping has stopped, • The quality of waterfilled underground mine is close to natural groundwater limits within 5 years Data: Reinsalu, E; Valgma, I; Lind, H; Sokman, K (2006). Technogenic water body closed oil shale mines. Oil Shale, 23(1), 15 - 28. TUT Mining Department

  17. Where can we be more efficient, sustainable? • There can be techncal solutions to avoid water income – infiltration dams, permeable walls • Clean the water to reach the drinking water quality • Computational mathematical models can beused to allocate the technicaland environmental constraints TUT Mining Department

  18. Where can we be more efficient, sustainable? But, ->There is always question of money, what is more pofitable? is it cheaper to pump the water and pay the taxes or use new innovative solutions? TUT Mining Department

  19. Conclusion • Increasing taxes has affect to develop new innovative technologies • to mine the maximum possible resources with less losses, • in the same time avoiding expansive impact to the environment • There can be used technological solutions to be more effective, environmentally friendly, sustainable TUT Mining Department

  20. Thank You for attention!

More Related