Alex I’m not arguing, just asking a couple questions. In the first …

Comment on Sands in Todd more stable than you think (re-published with Maxine Cook’s comment) by Hal Duell.

I’m not arguing, just asking a couple questions.
In the first photo there is a not particularly visible sand island that is not covered with any anchoring vegetation. In the second photo there is a clearly visible sand island that has been covered with vegetation that would help keep it anchored in place.
Does a sand island seen in the same spot in photos taken so many years apart imply the possibility of a natural eddy at that spot in any flow of the Todd? And if so, could today’s floods coming upon an anchored island build up that island until it becomes an obstruction? This is assuming that any flow of a river, coming upon an obstruction and therefore being checked to some extent, will drop at least some of the sediment it is carrying.
I think it is worth remembering that not all floods are raging events. Some are quite lazy, but they all carry sediment that can be left behind to be anchored with grasses.
Is couch with its root system more effective in that regard than buffel? if so, could it be the couch on the banks that is protecting the banks and keeping the Todd confined to its present course?

Hal Duell Also Commented

Sands in Todd more stable than you think (re-published with Maxine Cook’s comment)
Thank you for your clearly stated answers to my questions.
It is a bit of a shame, and a continuing problem that will always need managing, that Alice Springs was built where we find it. But after 124 years we’re still here, so we must not be doing everything poorly.
I agree with you when you state that the river and the ranges are our two most valuable natural assets, but I would like to add one more – the night sky. We can’t do much about the sky except keep any industrial smoke our of it, nor about the ranges other than keep them from burning down and/or eroding. But we can impact better on the river through good management.
And that’s the key – managing.
It’s too late to pretend it will ever again be a “wild river” along the stretch between The Gap and the Telegraph Station. And above the Telegraph Station a flood mitigation dam with no allowance for a residue of standing water would severely impact on any tendency for wildness there and immediately downstream. I suggest we let it go wild again once it leaves us, and agree to manage what has become part of our shared urban landscape.
Surely there are enough people with enough knowledge living here to come up with an acceptable plan. It doesn’t have to degenerate into a rancorous climate-change type debate.

Recent Comments by Hal Duell

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I appeal to the NT government, especially to Ministers Gunner and Wakefield, to reconsider their approach to building the proposed National Aboriginal Art Gallery in Alice Springs.
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It’s not like we’re short of space down here.
It’s a bit unfair to ask council to solve your location problem when to date both of your proposals have presented it with a solution impossible to sell to the residents. And remember, councillors also face the coming elections.
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