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  1. matsalleh

    Basic disinfection of potable water in 3rd world

    I am probabaly late on the draw for this thread, but figured why not throw my hat in the ring. Perhaps bleach is not recommended as the cure-all because it doesn't kill everything. Some protozoa like Giardia and Cryptosporidium are resistent to chlorine. You may have heard of an outbreak in...
  2. matsalleh

    channel design

    Drop structures are the way to go. Using large rip rap on a steep slope is sketchy...the equations may work out but you have to be concerned about a large stone breaking loose and the ensuing destruction. I am working on a similar situation, and have found gabions with 2 to 2.5 foot drops to be...
  3. matsalleh

    Design of Cascades in Steep Channels

    cvg--thanks for your help. One last question, have you used gabions for this app?
  4. matsalleh

    Design of Cascades in Steep Channels

    To answer the question of necessity...the flow from annual storms results in water that essentially runs into a dwelling, as the house was built 80 years ago where it would never be built today. The problem will be exacerbated by the really big storms. The owners sandbag each winter at the...
  5. matsalleh

    Design of Cascades in Steep Channels

    What are the accepted procedures for designing cascades to improve a steep, natural ephemeral channel (flow only during storms) on a residential site? I am trying to improve a channel with a slope of 30-40% (100-year design flow of 28.5 cfs). Following the steep section, the channel becomes an...

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