Editing Darling Scarp (section)

=== Dams ===
In the early twentieth century, most of the main rivers flowing off the escarpment had mainly been used for dams for water supply for metropolitan Perth. The dams on the scarp include:
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* [[Mundaring Weir]] (on the [[Helena River]])
* [[Serpentine Dam (Western Australia)|Serpentine Dam]] and Pipehead (Serpentine River)
* Wungong Dam
* [[Churchman Brook Dam]]
* [[North Dandalup Dam]]
* [[South Dandalup Dam]] (on the two Dandalup branches)
* [[Canning Dam]] (on the [[Canning River]])
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The only free flowing water from the Darling Range in the Peel Region is the Dirk Brook in [[Keysbrook, Western Australia|Keysbrook]] and the [[Murray River (Western Australia)|Murray River]].

The scarp also defines the easternmost limit of the various [[aquifer]]s present in the Perth Basin sediments, most notably the Southwest [[Yarragadee Aquifer]]. The scarp forms a divide between the hypersaline groundwaters typical of the Yilgarn craton basement from the fresh ground waters of the Perth Basin. Some dams along the scarp are contaminated by seepage of saline water from the granite into the base of the dam's water column and must be periodically flushed to preserve water quality.