Cliffs in the Narrabeen Group, Sydney

Cliffs form a magnificent front door for Sydney. A previous blog discussed those cut into Hawkesbury Sandstone to the south of the entrance to Sydney Harbour. Here we describe those carved into an older set of Triassic age rocks, the Narrabeen Group. Read More

PROGNOSIS FOR A CHOKING MOUTH: THE RIVER MURRAY

Some of the world’s major rivers no longer flow to the ocean. They begin to die from the mouth upwards. Extraction of river water for irrigation has dramatically affected the Colorado in the USA, and the Yellow River in China. In between Uzbekistan and Kazakhstan, the drying up of the former inland Aral Sea is an environmental disaster. Australia’s Murray-Darling Basin (MDB) is a large river basin by world standards, but even with management lessons from overseas river basins the River Murray mouth is being choked with marine sand. Read More

Geomorphologic Mapping

Self-isolation has benefits; time is available to look at collected materials stretching back many years. In the words of the late lamented John Chappell, “I went digging deep into one’s stratigraphy”. Read More

DOVER HEIGHTS CLIFFS, SYDNEY

Approaching Sydney from the east by sea or by air offers an experience rare for those entering a great city. Perhaps only San Francisco has comparable cliffs at its harbour gates. The majestic North and South Heads flank the entrance to the grand harbour called Port Jackson. These cliffs extend north towards Manly embayment and south to Bondi. It is this southern stretch that I want to reflect upon here. Read More

Recent Coastal Legal Cases

There have several recent court cases that relate to coastal management. We should be aware that decisions by courts can form a basis for future planning and actions in coastal management. Read More

HOLOCENE SEA LEVELS AND COASTAL EVOLUTION

I have long been interested in trying to unravel the driving forces that underpin the geomorphological and sedimentary record of coastal deposits. This has involved the study of sand barrier, river delta and coral reef sequences in different areas of the world. It is no surprise that this work has not been without challenges both in collecting and analysing data on the one hand and interpreting the depositional sequences on the other. One can only keep trying! Read More

NATIONAL COASTAL ADAPTATION AGENDA 2010: A RETROSPECTIVE

It is hard to believe that only 10 years ago on 18 February, 2010, around 180 coastal wonks gathered in Adelaide to discuss “developing a national coastal adaptation agenda”. It was a Forum sponsored by the then Australian Government’s Department of Climate Change and Energy Efficiency (DCCEE). A subsequent report of the Forum was released by the Department. But how times have changed? Read More