Mangawara flood protection scheme review

Report: TR 2020/01

Authors: Anderson Aimusu

A scheme review has been undertaken for the flood protection assets on the Mangawara River system.

The scope of this review is outlined in the project management plan, which covers collation and review of previous literature and models, updating the models with most recent hydrology, cross-section and stopbank survey data, and incorporating specific dams, floodgates and culverts within the system to improve model outputs and flood protection stopbank's performance.

The review also involves modelling future climate change hydrology and design flood profiles to inform stakeholders of the potential increase in flood risks resulting from future climate. It informs the Council of the potential loss in flood protection service level to assist in management decisions to build community resilience against future flooding.