If Clarence Valley Council accepted a report which stated that the effects of ocean storm tides (predicted to increase due to climate change) might be felt around 16kms inland from the coast as the crow flies, why would anyone seriously consider placing another 2,000 - 2,500 people within 2kms of the coast on flood storage land at West Yamba?
Flooding in the Lower Valley is subject to influence from the ocean. Ocean storm tide consists of three components: normal astronomic tide, storm surge and wave set-up.....
This will have greatest impact on the coastal communities at Yamba and Iluka, and may also have a secondary influence on flood behaviour up to about Maclean, especially for more frequent events such as the 5 year flood.
[GRAFTON AND LOWER CLARENCE FLOODPLAIN RISK MANAGEMENT PLAN, June 2007]