New Zealand Journal of Marine and Freshwater Research abstracts

---

Poverty Bay, New Zealand: a case of coastal accretion 1886-1975

R. KEITH SMITH

Water Quality Centre
Ministry of Works and Development
Private Bag, Hamilton, New Zealand

Abstract Survey and aerial photograph measurements reveal that increased sediment yield has resulted in the deposition of 3 970 000 m³ of material around the bay and up to 500 m of pro-gradation in the south-west of Poverty Bay, New Zealand, since the 1880s. Initially, port development enhanced sedimentation on the north-eastern side of the Bay, but later sand mining and river diversion caused the newly accreted deposit to be eroded. The eastern end of the beach now appears to be in a state of quasi-equilibrium. Stopbanking the Waipaoa River has increased sedimentation in the south-west where the rate of fluvial supply exceeds the capacity of marine transport processes. Increased sediment yield associated with land clearance has caused a 25% increase in the volume of material annually deposited on Waikanae and Muriwai beaches.

Keywords Poverty Bay; beach surveys; bush clearance; coastline development

New Zealand Journal of Marine and Freshwater Research, 1988, Vol. 22: 135-141 Crown copyright 1988Received 24 October 1986; accepted 16 July 1987

PDF file of entire paper: medium quality (603K); (scanned from paper original: notes about this process)

---

This year's abstracts | Journal home page | All abstracts | Publishing home page