Sand mining proposal for Otamarakau, Bay of Plenty / R.K. Smith

By: Smith, R.K.
Contributor(s): Water Quality Centre (Hamilton, N.Z.).
Series: Internal report / Water Quality Centre, Hamilton: no. 85/7Publisher: Hamilton, N.Z. : Hamilton Science Centre, 1985Description: 11 leaves : illustrations, graphs ; 30 cm.Report number: HPW-IR--85/07Subject(s): BAY OF PLENTY | SAND MINING | IMPACTS | NEW ZEALAND | WATER QUALITY In: Internal report / Water Quality Centre, HamiltonSummary: The beach between the Railways sand spit at Otamarakau and the mouth of the Waitahanui stream was examined as a possible site for sand mining. Aerial photographs since 1963 suggest beach change has been minimal in this area. The beach deposit is occasionally reworked by the meandering stream mouth causing a wide backshore to develop behind the beach face. The volume of the active beach deposit is about 124,000 m3 with short term natural variations of about 22,000 m3. The removal of 6000 m3 of material by April 1986 will have no noticeable effect on the beach deposit. However, monitoring sites should be established to allow objective evaluation of beach change, particularly as future applications for sand extraction may follow. Continued mining beyond April 1986 will require a more detailed examination over a longer stretch of coast.
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Item type Current location Call number Copy number Status Date due Barcode
JOURNAL JOURNAL WELLINGTON
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STACK NO. 85/7 1 Available J018051

The beach between the Railways sand spit at Otamarakau and the mouth of the Waitahanui stream was examined as a possible site for sand mining. Aerial photographs since 1963 suggest beach change has been minimal in this area. The beach deposit is occasionally reworked by the meandering stream mouth causing a wide backshore to develop behind the beach face. The volume of the active beach deposit is about 124,000 m3 with short term natural variations of about 22,000 m3. The removal of 6000 m3 of material by April 1986 will have no noticeable effect on the beach deposit. However, monitoring sites should be established to allow objective evaluation of beach change, particularly as future applications for sand extraction may follow. Continued mining beyond April 1986 will require a more detailed examination over a longer stretch of coast.

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