Gins Leap Gap Groundwater Study
KLC Environmental (KLC) was engaged by the Namoi Catchment Management Authority (Namoi CMA) to investigate groundwater movement through Gins Leap Gap (The Gap), north of Boggabri NSW.
This study was conducted as part of a larger Achieving Sustainable Groundwater Entitlements (ASGE) Program and utilised some of the available Community Development Grant monies that formed part of the program. Funding was provided under a joint Commonwealth/State Government grant.
Groundwater is a valuable resource and there needed to be a better scientific understanding of the ‘subterranean landscape’ such as faulting, fractures, volcanic events and associated aquifers to support sustainable irrigation and ecosystem management.
The Gap represents the boundary between Groundwater Management (GW) Zones 4 and 5 as defined in the Water Sharing Plan for the Upper and Lower Namoi Groundwater Sources (DWE 2008). The Gap also represents the northern extent of the Liverpool Plains.
The major tributaries of the Namoi River, including Cox’s Creek, the Mooki, Peel, Cockburn, Manilla and McDonald rivers all flow through The Gap as well as the groundwater associated with the unconsolidated sediments of the alluvial aquifer. The Gap forms a major constriction in the alluvial aquifer (Crawford & Aharon 2007).
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