Progress report on the Mid-Brisbane Stabilisation Strategy

Abstract

This document reports on progress in the first stage of the Mid-Brisbane Stabilisation Strategy, a project being conducted on behalf of Seqwater as part of the research agreement with Griffith University. It is delivered as part of Research Program 2: Optimising Multi Barrier Treatment. The aim for this program is to understand processes within Seqwater catchment‘s (source, store, supply) that influence water quality, and to identify ways to assess, investigate and improve treatment barriers for enhanced water quality outcomes. The study is part of sub-project 2 with the overall objective: Understand the spatial sources and active erosion processes (e.g. extent of channel erosion) which generate sediments under events of varying magnitudes and under differing dam management scenarios, and understand how these sources and processes may influence future sediment delivery to reservoirs and water treatment plants. This report delivers on milestone 1: Stage 1: preliminary progress report and maps on the rapid geomorphic assessment and LiDAR analysis for the Mid-Brisbane (Wivenhoe Dam to Mt Crosby) identifying some of the major erosion processes and reaches of low medium and high risk, and identification of options for stabilisation of the reaches of low risk in the mid-Brisbane channel.