1.1.6 Surface water – groundwater interactions

Summary

Assessments of surface water – groundwater connectivity undertaken in the Namoi subregion indicate that creeks and rivers are generally losing systems with the exception of reaches of the Namoi River between Boggabri and Narrabri which are predominantly gaining systems. The lower reaches of the Namoi River form a losing system and Pian Creek is classified as maximum losing. Maules Creek, in the north-east of the subregion, is also in connection with groundwater and is variably gaining and losing. Rivers and creeks to the east of the Hunter-Mooki Fault System (and therefore in the Namoi river basin but outside the Namoi subregion) tend to be gaining.