The Peninsula's river catchments are noted for their exceptional hydrological integrity. This will be particularly evident in groundwater flow systems of different catchments. Several others receive their domestic water from rainwater catchments, nearby streams or rivers. There are dams, weirs, catchments, and barrages in New South Wales. Hollows in the rock surfaces provide catchments for rainwater. Increased re-afforestation in cleared catchments also has the prospect for water losses. This is an extensive network covering all major rivers and catchments in the country. They were recorded in streams in the catchments of the Mary, Stanley and Mooloolah Rivers. Other major catchments are those of the Waihou, Piako, Awakino and Mokau rivers. Protecting water resources in the water supply catchments. The Sagarmatha National Park encompasses the upper catchments of the Dudh Koshi River system. Populations of southern gastric-brooding frogs were present in logged catchments between 1972 and 1979. Woiworung clans were based on the Yarra River and its catchments. The two existing upload water catchments were becoming increasingly insufficient. In 1989 regional council boundaries were redrawn, with an emphasis on connected catchments.