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Annex I Formula for the calculation of the average yearly increase in stored water within the tailings pond ΔQ as referred in Article 8 paragraph 2

United Kingdom

Original text. Later amendments are not shown.

ΔQi

  • (ΔΜi/D) * P, where:

    • ΔQi

  • yearly increase of stored water in the tailing pond (m3/year) during the year ‘i’

    • ΔΜi

  • yearly mass of tailings discharged to pond (tonnes dry weight/year) during the year ‘i’

    • D

  • average dry bulk density of the deposited tailings (tonnes/m3)

    • P

  • average porosity of the sedimented tailings (m3/m3) defined as the ratio of the volume of voids to the total volume of sedimented tailings

    • If exact data are not available, default values of 1,4 tonnes/m3 for the dry bulk density and 0,5 m3/m3 for the porosity should be used.