in desert areas the main geodynamics is linked to the wind: accumulation or erosion of a sand cover, erosion of the substratum

Dear Mr.Moini

Sub surface structural analysis (folding and fault trends) with lithological characteristics change the aspect,  therefore, the color contrast of the satellite control by  the mentioned factors. Direction of wind and erosional pattern can made the structure.

I propose you see the link below:

link 1: https://books.google.com/books? id=dL_8BAAAQBAJ&pg=PA34&lpg=PA34&dq=desert+pattern+in+satellite+imagery&source=bl&ots=lTpKVXy2Il&sig=mKWyYVuZq0hsvxkMFR67ejtpo9U&hl=en&sa=X&ved=0CFkQ6AEwCmoVChMI_JeNjLWPyAIVSv9yCh24DAVp#v=onepage&q=desert%20pattern%20in%20satellite%20imagery&f=false

link 2: https://books.google.com/books?id=lCB6RK81HLsC&pg=PA36&lpg=PA36&dq=desert+pattern+in+satellite+imagery&source=bl&ots=7IPA0tPtrq&sig=fIe_OsPipOyUpnuVTI-D9b0tZfI&hl=en&sa=X&ved=0CFsQ6AEwC2oVChMI_JeNjLWPyAIVSv9yCh24DAVp#v=onepage&q=desert%20pattern%20in%20satellite%20imagery&f=false

Regards

M.Afghah

Mr Javad

You can work in several ways:

1 - to make eroion factors spacialy winds as abase of distribution>

2 - You can take the structurl factor in your distribution.

3 - you can take the time (old) to do this thing.

thanks

Mr Javad

You can work in several ways:

1 - to make eroion factors spacialy winds as abase of distribution>

2 - You can take the structurl factor in your distribution.

3 - you can take the time (old) to do this thing.

thanks

Mr Javad

You can work in several ways:

1 - to make eroion factors spacialy winds as abase of distribution>

2 - You can take the structurl factor in your distribution.

3 - you can take the time (old) to do this thing.

thanks

Mr Javad

You can work in several ways:

1 - to make eroion factors spacialy winds as abase of distribution>

2 - You can take the structurl factor in your distribution.

3 - you can take the time (old) to do this thing.

thanks

Is this yardang?

Thanks..

For the better understanding, look at the attached Images. These images show the different alluvial units. The larger stream channel act as borders of Units.

Dear  Mr. Moini

Drainage pattern is a function of lithology (or soli texture, soil mineralogy, percentage of clay, type of clay minerals), depth of soil evolution, topography, volume of run off, amount of precipitation, sediment supply,  physical erosion by other agency, plant coverage density, types of plant, ecosystem, climatological period,  recent tectonic activity (neotectonic faults) see links below:

link 1:  http://hmxearthscience.com/Warehouse/geology/documents/surface%20processes/Landscapes%20and%20Drainage%20Patterns.pdf

link 2: https://books.google.com/books?id=ccUvRES5FSQC&pg=PA136&lpg=PA136&dq=factors+of+drainage+pattern+in+desert&source=bl&ots=uL8-IH6msT&sig=uZdbPDIXPQYu-YSLYhyYUbLn6gw&hl=en&sa=X&ved=0CEEQ6AEwBmoVChMI49Gk0ZaSyAIVjBcsCh3nWwTL#v=onepage&q=factors%20of%20drainage%20pattern%20in%20desert&f=false

link 3: https://www.wou.edu/las/physci/taylor/g322/deserts.pdf

link 4: http://digital-desert.com/mojave-preserve/geology/04.html

 Regards 

M.Afghah

Dear Javad,

I looked on google map and your area of study belongs to a pediment geomorphologiocal structure representing a transition zone between the mountains and the principal alluvial network (main wadi, the latter folowing a line between Neyestanak and Naien) for alluvio-colluvial material inherited from the mountainous area.

You can notice that the clast are still quite angular, showing a restricted transport under water and that the material source is not so far. If you go to the main wadi, the clast will be more rounded.

It is possible that this pediment is actually inactive (form most of the part) and that the material (pictures) were spread during the Pleistocene or Pliocene compared to the Holocene active wadi.

Nevertheless, distribution patterns are the results of runing water which build new structures and eroded others like in the wadi.

See the link.

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CBwQFjAAahUKEwjjlYeSo5LIAhXEWRQKHUxDAbc&url=http%3A%2F%2Fweb.gps.caltech.edu%2F~mpl%2FGe126_Reading_List%2FCh13.pdf&usg=AFQjCNHC_I8CgbGFcGFpRxrlTyPLfR6fAw&sig2=l9HQyjDgT7cLZcDT4ylBTg&bvm=bv.103627116,d.d24

Firstly,the sediment should be confirmed so that you can analysis its construction

Firstly,the sediment should be confirmed so that you can analysis its construction

I also suggest you look up desert pavements, which closely resemble your first picture. As someone mentioned before, the clasts in that picture are quite angular, suggesting minimal transport by water. I suggest that the lack of fine sediment is due to aeolian deflation, whereas in the second picture you have an ephemeral stream (someone mentioned wadi already) that periodically sees water flow. Two different processes at work: two different sedimentological signatures. 

If you knew the direction the sun was coming from, it would help.  The form is similar to Chinese transverse dunes with the slip-off slope being towards the bottom right.  They are often parallel but discontinuous.  Do you have any stereo pairs?  If so, you should be able to discern the topography which would quickly determine whether they are dunes or surface patterns on the desert floor.  Transverse dunes are often discontinuous in this form and form waves moving across the landscape at right angles to the dominant prevailing wind.  They can also be modified if the wind direction reverses for part of the year, as happens in places on the Qinghai-Tibet Plateau,

As a complement to wind forms. a pattern of typical topography of mountainous areas of transition to alluvial flat areas is observed, it is formed by deposition of the materials carried by water currents, whether permanent or occasional.

With changing angles of slope of the topography and the cause, the river is forced to leave the sediment load transported, this causes the drainage pattern dichotomous with multiple channels and a selection of grain sizes under the bed loses topographic height.

These depositional events overlap each other, making it possible to map and numbering the events.

The fact remains that the topography looks like a dune area that has been largely vegetated, with only the white areas on slip-off slopes that still lack a vegetation cover.  It should be obvious whether this is an alluvial pattern or one dominated by wind action if the surrounding area is examined.  Unfortunately, the area covered by the photo is too small, and it lacks a scale to help others answer the question.  As a result, we can only suggest possibilities.