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  1. 7058

    Costs of getting rid of minerals from water

    Please let me know if it is possible to use the reject water from reverse osmosis (contains 4 times more minerals than normal potable water) and get process water (I assume something like distilled water) with 0% minerals. How much would it cost to erect one plant capable of producing...
  2. 7058

    Flange adapter coupling

    Is it possible to couple with flange adapter reducer with pipe? This is the case where leaking has occured at this joint. Dragan Andrejevic
  3. 7058

    Length of culvert's apron

    Is there any rool regarding length of the apron for box (and pipe) culverts size 1-5m.? Is it trade rool to have apron as long as wing walls or it may be shorter? I made hundreds of those but do not remember a single apron shorter than wing walls. Now it seems I have to design so. Please let me...
  4. 7058

    Q for pond design

    What shall I use as criterion for sizing a pond for develpoment project? 1/Is it Q=CIA/360 (for metric)? 2/If yes, which I? 10min 60min, 120min 1440min? 3/ Or shall I use Rain Hydrograph? I tried both and results are far apart (20/50%)Generally Rain Hydrograph gives much smaller quantities...
  5. 7058

    Shotcrete retaining wall

    Who knows what drainage is needed for 6 inch shotcrete wall. above the wall and behind concrete layer. Which AASHTO standards?

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