Monday, September 26, 2011
Saturday 15th October
Venus Bay Surf Life Saving Club
Start from 9.30am with opportunity to participate in half or whole day program finishing around 3pm
Morning session presenters: Tanya Pyk from Birds Australia and Jonathon Stevenson from Parks Victoria
Morning Tea and Lunch provided but BYO special dietary requirements.
Please RSVP to Tanya Pyk firstname.lastname@example.org or ph:03 9347 0757
Saturday, September 24, 2011
At many location along the Venus Bay beaches, you can see two generations of erosion on the one dune face. The upper erosion scarp (a geological term for the small vertical face, escarpment, created when waves washed away some sand) has itself been partly eroded. As the sand face dries out it becomes unstable and collapses along wind picks up other dry sand and piles it infront of the face. Re-grown of saltbush grasses help stabile the sand collecting infron of the dune. Eventually the scarp itself will dissapear and the dune just have a steep front face. The recent erosion can be seen at the base as a new vertical face, with a areas where blocks of unstable sand have already tumbled from the sand faces above.
REMEMBER: These sand faces are remain very unstable, even if they sometimes look dry and stable.Even just a single square meter of wet sand will weigh close to 2 tonnes enough to fatally bury an adult. So children (even grown up ones) must be discouraged from playing on such erosion scarps
Thursday, September 22, 2011
Having been away for a couple of what I have come to know as the most active erosion months (August and September, presumably because of the strong swells and storms are common in these months). I was surprised that maybe there had not been as much erosion as I was expecting. Still quiet a lot of the beach shows an erosion scarp of 1 to 2m. I was also surprised to see so much seaweed on the beach (perhaps the swells have also disturbed the kelp forest off shore).
This location (just south of the beach one ramp) also shows clearly something I had noted before. The fenced “rehabilitation” area, has mainly coastal spinifex, where as the eroded area to the south is dominated by marram grass. Perhaps the flatter slope angle of the dunes with coastal spinifex lets the occasional high waves run up their surface rather than starting an erosion notch.