Speaker: Melanie Roberts
Affiliation: Griffith University


Gullies are hot spots of erosion – responsible for as much as 40% of the sediment that ultimately reaches the Great Barrier Reef.  This sediment, and the nutrients transported with it, contribute to poor water quality outcomes, which is the greatest threat to the reef after climate change.  Understanding the contribution of gully erosion to the bio-available nutrient pool in addition to fine sediment loads is essential to determining the cost-benefit of different landscape rehabilitation and management options to meet water quality targets and protect the reef.

The MERGE gully erosion model was developed in partnership with Queensland Government and the Queensland Water Modelling Network to provide a process-based model to inform gully rehabilitation actions at specific sites.  In this talk, I introduce the MERGE model and an in-development extension of the model MERGE-D.  MERGE-D provides an essential extension to MERGE to enable the accurate prediction of particulate nutrient export, and therefore the contributions of gully erosion to the bio-available nutrient pool in coastal and marine environments.

About Statistics, modelling and operations research seminars

Students, staff and visitors to UQ are welcome to attend our regular seminars.

The events are jointly run by our Operations research and Statistics and probability research groups.

The Statistics, modelling and operations research (SMOR) Seminar series seeks to celebrate and disseminate research and developments across the broad spectrum of quantitative sciences. The SMOR series provides a platform for communication of both theoretical and practical developments, as well as interdisciplinary topics relating to applied mathematics and statistics.


Priestley Building (67)
Room: 343 (and via Zoom:
and via Zoom (https://uqz.zoom.us/j/85172010876)