[GRASS-user] Suggestions for backward modelling of a river system

[Achim Kisseler]

By the way: it depends on the detail!

Pre glacial reconstruction of watersheds from isostatical 
land-level-changes (ger. Ausgleichsbewegungen) were done for noth 
america. I think it was last year.

Regards,
Achim

On 17.03.2010 22:52, Achim Kisseler wrote:
> That erosion processes are highly non-linear. Running physical based
> erosion models in "backwards-mode" is not possible I would bet.
>
> I guess one have to work with ground layers, geological land rising and
> lowering, climatic changes and so on.
>
> But well-wrought concept ideas are always welcome.
>
> Achim
>
> On 17.03.2010 22:12, Maris Nartiss wrote:
>> One can't turn back time, still I also have been thinking about
>> playing with erosion models in backwards mode. If it's possible to
>> calculate current erosion rate and eroded material ammount, it should
>> be possible to add erroded material to DEM, repeat erosion model run
>> on new DEM and in such way back for some K years (runs). It will not
>> take into account all possible events, still for some landscapes it
>> might work rather well (think - no high mountain areas or territories
>> with often landslides etc.).
>>
>> Maris.
>>
>>
>> 2010/3/17, Achim Kisseler<ak7 at jupiter.uni-freiburg.de>:
>>> Hi,
>>>
>>> that mean, as I understand, that you have to have a paleo DEM.
>>>
>>> You have to ask the question:
>>> On what data basis do I want to reconstruct paleo landscape?
>>>
>>> Geomorphological changes cannot be reconstructed just with a present day
>>> DEM.
>>>
>>> Achim
>>>
>>>
>>> On 17.03.2010 14:21, Marc Stonestreet wrote:
>>>> Hi all
>>>>
>>>> Can anyone suggest a method to backward model a river system's flow
>>>> path
>>>> that can integrate with srtm data?
>>>>
>>>> I am seeking a way (if possible ) to look back in time at the
>>>> paleo-course
>>>> of a river system.
>>>>
>>>> I have no doubt that a solution would be a complex undertaking - could
>>>> anyone advise me on what approach I should adopt at least?
>>>>
>>>> I have the srtm data - guess that was the easy part.. now how would I
>>>> 'age' the data?
>>>>
>>>> Regards
>>>>
>>>> Marc S_______________________________________________
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