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Tarawera river water quality survey, 26 September 1986 / J.W. Nagels, Glenys F. Croker, J.C. Rutherford

By: Nagel, J.W.
Contributor(s): Croker, G.F. (NIWA. Hamilton) | Rutherford, J.C. (NIWA. Hamilton) | Water Quality Centre (Hamilton, N.Z.).
Series: Internal report / Water Quality Centre, Hamilton: no. 86/24Publisher: Hamilton, N.Z. : Hamilton Science Centre, 1986Description: 18 leaves : illustrations ; 30 cm.Report number: HPW-IR--86/24Subject(s): TARAWERA RIVER | SURVEYS | RESPIRATION | SEDIMENTS | WATER QUALITY In: Internal report / Water Quality Centre, HamiltonSummary: Ten weeks after the Tasman Mill shutdown, the Tarawera river had a DO deficit of 1.2 g/m3 : comparable with that measured during the 1983 shutdown, but 1.0 g/m3 greater than predicted by the GUM model for the small measured BOD5 input . Respiration rate of bed sediments below Kawerau averaged only 1/3 of rates measured during normal operation but were still 2-9 times higher than rates measured above Kawerau. It is probable that the river had not adjusted to a new steady-state at the reduced loading even after ten weeks.
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Item type Current location Call number Copy number Status Date due Barcode
JOURNAL JOURNAL WELLINGTON
STACK
STACK NO. 86/24 1 Available J018079

Ten weeks after the Tasman Mill shutdown, the Tarawera river had a DO deficit of 1.2 g/m3 : comparable with that measured during the 1983 shutdown, but 1.0 g/m3 greater than predicted by the GUM model for the small measured BOD5 input . Respiration rate of bed sediments below Kawerau averaged only 1/3 of rates measured during normal operation but were still 2-9 times higher than rates measured above Kawerau. It is probable that the river had not adjusted to a new steady-state at the reduced loading even after ten weeks.

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