Dams and catchments | Water Supply | Water Corporation


Here’s a question why is it that when
Perth gets a heavy rainfall our dam levels don’t automatically rise at the
same time. The answer it’s all to do with how much moisture is in the soil in our
catchment areas, a catchment is an area where water is collected by the natural
landscape and it’s usually surrounded by high features such as hills or mountains.
The soils in our catchments act like a sponge soaking up moisture storing it in
underground aquifers and gradually releasing it into our rivers and streams
which then flow into our dams. Years of below average rainfall means that Perth’s catchment areas have become drier and drier so when the rains
do come they are soaked up by the soil which leaves us needing a lot more
rainfall for the water to eventually find its way into our dams what’s more
because Perth’s groundwater levels are dropping too it takes even longer for
rainfall to seep into the ground soak the catchments and get the streams
flowing. So there’s the answer it’s all to do with Perth’s dry
catchments. The fact is even if we do get decent rainfall in any one year we’ll
still get a lot less streamflow into our dams than we would have had from the same amount of rainfall several years ago. So why do our dam levels look the
same as other years? because we’re helping our dams by using them to store
water from climate independent sources like desalination. Water is stored in
dams during periods of low demand so it is available when it is most needed in
the hotter months. to find out more visit our website at watercorporation.com.au forward slash our water

2 thoughts on “Dams and catchments | Water Supply | Water Corporation

  1. Hey check out these clowns , always going on about saving water !! You should read their last audit report , they wasted more water than the whole private sector combined !! Now that's a Joke.

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