Urban Salinity | Buildings and Structures | Vegetation and Earth
The figures show examples of damage caused by salinity and/or waterlogging to roads in Bendigo.
The most common types of damage to road assets in the Northern region according to Houghton et al. (2002) and O'Flaherty (2003) are:
Houghton et al. (2002) and O'Flaherty (2003) provide useful information and guidelines for salinity management for road asset managers.
It is not always easy to determine the precise impacts of a high watertable and salinity on road assets since there are a number of inter-related processes that can contribute to a damaged road pavement.
- base failure,
- shape loss,
- pavement shoving, and
- seals deteriorating (particularly in regions with saline groundwater).
|There are, however, several general clues that you can look for:
- Topographically low areas within areas known to have salinity problems will be the most likely sections of road to be vulnerable to salinity.
- Vegetation on road verges may also show signs of being affected
- The presence of several salt indicator plants (eg spiny rush, sea barley grass, buck's horn plantain, etc)
- Bare, patchy growth or scalding
- White salt crystals forming on the ground surface.
Cracked and potholed road in the foreground and salt tolerant vegetation and scalding in the background.
McRobert J and Foley G (1999) The impacts of waterlogging and salinity on road assets: a Western Australian case study. Special Report 57, ARRB Transport Research Ltd, Victoria.
Houghton N, McRobert J and Styles E (2002) Salinity and rising water tables - risks for road assets. Austroads Project No. BS.A.N.523. Austroads Inc, Sydney.
O'Flaherty K (2003) Roads and salinity. NSW Department of Infrastructure, Planning and Natural Resources.