Decreasing the threat to productivity and ecological integrity in the Macquarie Marshes and Gwydir Wetlands

GHD was engaged by the Central West (CW) and Border Rivers-Gwydir (BRG) catchment management authorities (CMAs) to study the distribution and management of Lippia in the Macquarie Marshes & Gwydir Wetlands.

Our work increased the CMAs' understanding of Lippia (Phyla Canescens) throughout the area, including the rate of spread, outbreak triggers and control measure successes.

Lippia has been present in the Gwydir Wetlands and the Macquarie Marshes for at least 20-30 years and now covers an area of approximately 181,000 ha and 22,955 ha respectively. Our team developed maps to estimate an upper limit of Lippia distribution and abundance given the flooding extents assumed in each catchment.

The extension materials are the base for appropriate management options and control strategies.

Water Sciences

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Our reliance on the ecosystem services provided by marine, freshwater and estuarine environments demands a proactive approach to our sustainable use of these assets.

Our water sciences services integrate scientific knowledge with  engineering and economic services to provide innovative, cost-effective  management solutions.

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Waterways & Coastal

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Today, GHD has one of Australia’s largest groups of dedicated water management professionals. We provide leading technical support for the study and management of all forms of waterways, including rivers, lakes, estuaries and coastal areas.

GHD’s Waterways & Coastal offering service line covers background and baseline studies, strategic and planning studies, and impact assessments. We can work with you on all stages of the feasibility and design process through to the supervision of construction projects with respect to waterways and developments affecting waterways.

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