Rangitaiki-Tarawera Rivers Scheme
This scheme encompasses two rivers the Rangitaiki and the Tarawera. The Rangitaiki catchment covers 3005 km2. The Tarawera catchment covers 984 km2.
- Rangitaiki Tarawera Floodplain Management Strategy - Stage 1 (8.2MB, pdf) LARGE DOCUMENT
Order a copy
To order a copy of the Rangitaiki Tarawera Floodplain Management Strategy Stage 1 please contact us. Cost: $27. Alternatively, click on the link above to download a copy.
Scheme meeting notes
Bay of Plenty Regional Council has a network of liaison people for each of the EBOP-managed river and drainage schemes in the region. The liaison group members are the representatives for the ratepayers of their particular scheme. Meetings are held with the liaison groups in March and November of each year. Extraordinary meetings are called as required. Below is a copy of the notes from the last cycle of liaison group meetings.
For previous meeting notes contact us on the details below.
|Rangitaiki Attachments map 1||3MB|
|Rangitaiki Land Formations map 2||3MB|
|Rangitaiki Tarawera Catchment Geology map 3||3MB||jpeg|
|Rangitaiki Tarawera Catchment Land Cover||3MB||jpeg|
The Rangitaiki River rises 130km from the Bay of Plenty coast and 32km east of Lake Taupo to an elevation of 800m. It flows 64km across the Kaingaroa Plains to Murupara where the flood flows are only two or three times the normal as a result of the absorbent pumice plains. 20km further on the Whirinaki and Horomanga tributaries join the main channel contributing relatively large flood flows and quantities of shingle.
The river flows across the Galatea Plains before entering the hydrolake Lake Aniwhenua. Lake Rerewhakaaitu drains into the river which then passes through a gorge and out on to the Waiohau Plains to the hydrolake Lake Matahina. Finally the Rangitaiki passes through a valley, across the Rangitaiki Plains and out to sea at Thornton through a 1500m cut excavated in 1913.
The Tarawera River drains from Lake Tarawera at 300m elevation. The river drops to 150m in 6.5km and continues to fall to Kawerau. Below Kawerau the grade is more gentle. Tributaries such as the Mangawhio, Waiwhakapa, and Mangate join the Tarawera River above Kawerau, the Mangaone and Ruruanga near Otakiri and Awakaponga near Matata. The Rangitaiki Plains drainage scheme also contribute to the Tarawera flow. The pumice of the Tarawera catchment and ponding effect of the lake regulate the runoff and maximum recorded floods have only been two to three times the normal flow.
What Does the Scheme Involve?
Substantial stopbanking of the Rangitaiki River at Te Teko the Tarawera is stopbanked below the State Highway 30 bridge the scheme is designed to provide protection from a 100 year flood.