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Dykes - Frost action
Unit 4- Layout planning of fish ponds
Dykes
Frost action
The last allowance must be providing for dam height is frost action. Due to freezing and thawing, loosen soil making it unstable as a dam. So dam height is increased in sufficient amount depending on location.
Height of the dyke = H = h +hf + hw + hs + hfa
h = Depth of water
hf = Height of free board
hw = Dam height needed for wave action.
hs = Height for settlement
hfa = Height for frost action.
The last allowance must be providing for dam height is frost action. Due to freezing and thawing, loosen soil making it unstable as a dam. So dam height is increased in sufficient amount depending on location.
Height of the dyke = H = h +hf + hw + hs + hfa
h = Depth of water
hf = Height of free board
hw = Dam height needed for wave action.
hs = Height for settlement
hfa = Height for frost action.
Last modified: Monday, 25 April 2011, 7:21 AM