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  • Users: jcirish
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  1. jcirish

    Free online tools to identify closed basins

    Are there any free online tools to identify and highlight closed basins? Thanx
  2. jcirish

    siphon limits

    Theoretical Limit of lift to siphon by physics and bernoulli (and in most published sources)is about 32 ft, decreases with altitude with lower density air. YET in practical life, said lift is about 20 ft at sea level and drops 1 ft per 1000 ft of altitude. Why the great diff? You can NOT lose...
  3. jcirish

    bell siphon

    what is MAX difference is start and stop elevations for a bell siphon using water at sea level? I would think that Bernoulli equation would rule here. And you get about 10 meters or 33 ft. Civil engr texts limit it further to 20 ft minus 1 ft for every 1k in elevation.... to account for lower...
  4. jcirish

    bell siphons/covered standpipes

    Looking for data on bell siphon. Will they work at height of 100 ft over pond? 50 ft? Don't think normal 20ft or 33 ft 1 ATM limit applies to bell syphon. Can you fill syphon from top with proper valves and seals to prevent having to fill shole reservoir? Where can I find data on predicted...
  5. jcirish

    pond invert elevation, high tailwater in pond

    Fl and county just 4 laned road by me. If permanent pool of wet detention pond extends way back into the inlet pipe..... inlet pipe of Pond 1 for SR 415 is 2.2 ft submerged always. It's top elev is 5.5 ft (invert is at 6 inches and pipe is 5 ft diam) and permanent pool elev is 8.7. I believe a...
  6. jcirish

    Permanent pool of pond extends way up into inlet pipe

    Fl and county just 4 laned road by me. If permanent pool of wet detention pond extends way back into the inlet pipe..... inlet pipe of Pond 1 for SR 415 is 2.2 ft submerged always. It's top elev is 5.5 ft (invert is at 6 inches and pipe is 5 ft diam) and permanent pool elev is 8.7. I believe...
  7. jcirish

    riser installed on downstream end of pipe

    What are effects of installing a flashboard riser on the DOWNSTREAM end of culvert by mistake? Smaller Flows, erosion,whatever?
  8. jcirish

    flood engr

    What is best way to repair culvrt headwalls built with no steel rebars? Structures show seepage and piping and many stru tures have failed.

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