tˈuː kɹˈiːk sˈɪstəmz, kˈɑːkəl ænd dˈoːɹə kɹˈiːks, wɜːɹ ˈɛstᵻmˌeɪɾᵻd təbi kəntɹˈɪbjuːɾɪŋ ænd pɜːɹ ˈænəm ɹᵻspˈɛktɪvli.
Two creek systems, Cockle and Dora Creeks, were estimated to be contributing  and  per annum respectively.