Riina Vaht "The impact of oil shale mine water on hydrological pathways and regime in northeast Estonia" | University of Tartu

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Contacts of UT units

Faculty of Arts and Humanities
Faculty phone: 
+372 737 5341
Faculty address: 
Jakobi 2, rooms 116–121, 51005 Tartu
  • Dean's Office
    Faculty phone: 
    + 372 737 5341
    Faculty address: 
    Jakobi 2, rooms 116–121, 51005 Tartu
  • Institute of History and Archaeology
    Faculty phone: 
    +372 737 5651
    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Estonian and General Linguistics
    Faculty phone: 
    +372 737 5221
    Faculty address: 
    Jakobi 2, 51005 Tartu
  • Institute of Philosophy and Semiotics
    Faculty phone: 
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    Faculty address: 
    Jakobi 2, rooms 309–352, 51005 Tartu
  • Institute of Cultural Research
    Faculty phone: 
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    Ülikooli 16, 51003 Tartu
  • School of Theology and Religious Studies
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    +372 737 5301
    Faculty address: 
    Ülikooli 18–310, 50090 Tartu
  • College of Foreign Languages and Cultures
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    Lossi 3, 51003 Tartu
  • Viljandi Culture Academy
    Faculty phone: 
    +372 435 5232
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    Posti 1, 71004 Viljandi
Faculty of Social Sciences
Faculty phone: 
+372 737 5957
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Lossi 36, 51003 Tartu
  • Dean's Office
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    Faculty address: 
    Lossi 36, 51003 Tartu
  • Institute of Education
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    Salme 1a–29, 50103 Tartu
  • Johan Skytte Institute of Political Studies
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  • School of Economics and Business Administration
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  • Estonian Marine Institute
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    Mäealuse 14, 12618 Tallinn
  • Institute of Physics
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  • Institute of Chemistry
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Institutions
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    W. Struve 1, 50091 Tartu
  • Youth Academy
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    Uppsala 10, 51003 Tartu
  • Institute of Genomics
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    Riia 23b, 51010 Tartu
  • Museum
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  • University of Tartu Natural History Museum and Botanical Garden
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    Vanemuise 46, 51003 Tartu
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    Faculty address: 
    Narva mnt 18, 51009, Tartu
  • University Office in Tallinn
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    Faculty address: 
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  • Estates Office
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    Ülikooli 18a, 51005 Tartu
  • Finance Office
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    Jakobi 4, 51005 Tartu
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  • View all other units

Riina Vaht "The impact of oil shale mine water on hydrological pathways and regime in northeast Estonia"

Date: 
05.12.2014 - 10:15 to 11:45

Thesis supervisor:
Dr. Will Mayes, University of Hull, United Kingdom
Prof. Ülo Mander, University of Tartu

Opponent:
Dr. Julien Tournebize, National Research Institute of Science and Technology for Environment and Agriculture (IRSTEA), Antony, France

Summary:
Mining activity can change both the runoff regimes and drainage areas of river systems when new mines are opened or closed. Mine water discharge can affect river run-off seasonally or can influence river hydrological regime annually. Current analyses show that the annual mine water discharged to the River Purtse catchment area does not affect its long-term annual as it regime shift appears to be driven primarily by precipitation. Although, the percentage of extra groundwater in the mine water is much higher and effect on the River Pühajõgi is greater.
However, mine water discharge can affect the River Purtse baseflow minima, thus increasing the amount of the run-off during summer months and changes in high water period. During phases of intense mining, summer baseflow is between 53-72% higher than long-term average baseflow in the Purtse catchment, and between 66-92% higher in the smaller Pühajõgi catchment, where the volumetric significance of mine discharges is greater. Also mine water influences high water period behaviour, where the average before-peak period is four days shorter, with a smaller run-off rate, but is usually longer with much higher run-off after the peak period. The reference catchment of the River Keila does not show any significant change in summer baseflow during the study period, suggesting that the changes in the Pühajõgi and Purtse are not controlled by climatic drivers.

The strategic placement of mine water discharge points in positions that minimise flow path changes and minimise the volumetric significance of change in flow in receiving water courses would limit the extent of any impacts. Thus, results of this study can be used for the planning and sustainable management of mining-influenced river catchments.

Location: 
UT Senate Hall
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