Avon River (Western Australia)
Map of the Avon River
Avon River and Eastern Railway freight train at the Avon Valley
The Avon River is a river in south-west of the Australian state of Western Australia. From the mouth of the Wooroloo Brook, Swan River is called (Western Australia)
Geography
The river rises in Yealering, about 50 km east of Pingelly and flows northwest through the towns of Beverley, York and Northam. In Toodyay he turns his course to the west and the Avon Valley National Park to the southwest. After crossing this national park he continues to flow through the Walyunga National Park, where he becomes the Swan River.
Catchment area
In Yealering in Wickepin Shire the source of the Avon River and the catchment area is above the confluence with the Salt River in Lake Yealering is 91.5 thousand km ².
The drainage basin covers a large part of the Wheatbelt region and extends in some areas even beyond to the vicinity of Lake Moore always dry in the northeast; a regular flow of water is to be expected only from the western edge of the basin. In fact, you might not know until the unusually wet 1963, that from the north-eastern part of the basin beyond the Wongan Hills ever flowing water in the river. Under current climatic conditions, it is almost impossible to get out of areas other than the western edge of the basin water in the river, because the amount of rain that would cause a water drain, greater than the actual average rainfall per year is there.
Tributaries with muzzle heights
- Woodebulling Brook - 266 m
- Bindermucking Gully - 263 m
- Sand Plain Creek - 232 m
- Nalyaring Gully - 221 m
- Bally Bally Gully - 211 m
- Weam Gully - 210 m
- Avon River South - 208 m
- Monjerduckling Gully - 206 m
- Turkey Cock Gully - 206 m
- Solomons Gully - 190 m
- Dale River - 189 m
- Yangedine Brook - 180 m
- Mackie River - 180 m
- Bland Brook - 178 m
- Sermon Gully - 164 m
- Heal Brook - 161 m
- Spencers Brook - 155 m
- Mortlock River - 146 m
- Wongamine Brook - 146 m
- Mistake Creek - 143 m
- Harper Brook - 141 m
- Boyagerring Brook - 133 m
- Toodyay Brook - 128 m
- Jumper thing Brook - 128 m
- Mortigup Brook - 128 m
- Malkup Brook - 114 m
- Munnapin Brook - 110 m
- Julimar Brook - 109 m
- Red Swamp Brook - 77 m
- Brockman River - 55 m
Geology
Due to the extraordinary age of soils in the pool ( which is on the extremely old Yilgarn craton ) is the root density of native flora very high and the average specific washout probably the lowest among comparable large basins of the world. The very high age of the soil also means that - at least after the deforestation for agricultural purposes - almost all the rivers of the basin have salinity of more than 0.3%, and many even significantly more. 0.3 % salt content equivalent to a tenth of that of sea water and about eight times as much as to be classified as fresh water would be allowed.
The catchment area by attracting some of the longest of Europeans populated agricultural areas of Western Australia and has exceptional problems with the salt content of the soil, which has led to government programs to alleviate loss of arable land. Citizens' groups, the monitored projects in the tributaries of the Avon River, were financially supported from public and private sources.
River valley
The valley of the River Avon is the third and final route of the Eastern Railway through the Darling Range between Midland and Northam. This route was built in the 1960s.
There are also the annual Avon Descent white-water race takes place.