Dam profile describing General terms
High Flood Level(H.F.L.):-
The maximum water level that is attained during floods
Full Reservoir Level(F.R.L.):-
It is also called full tank level. It is the level upto which the water is stored obviously the crest of the spillway is fixed at this level
Free Board:-
To prevent the over topping of the dam during peak floods a sufficient margin water level in the reservoir and top of the dam.
Gross free board:-
It is the difference level between F.R.L. and the top of the dam
Net free board:-
It is the difference of level between M.W.L. and the top of the dam
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Dam profile describing General terms |
Sluices:-
They are the openings extending from U/S face of the dam to D/S face of the dam. They are used to clean the silt from reservoir or to supply water to the D/S of the reservoir.Also they decrease the peak flood in the reservoir.
Dead storage:-
It is the part of the stored water in the reservoir basin which is not available for the use and hence termed as dead storage
Gross storage capacity:-
It is the total quantity of water stored upto F.R.L. it includes dead storage also.
Live storage:-
it is the difference between gross storage and dead storage.It is amount of water available from the F.R.L. to the still of lowest sluice.
Minimum Draw Down Level:-
It is the lowest level up to which the reservoir is depleted from the considerations of Hydro-Power generation
Sir small mistake in your notes that is "crest" is correct(creep)is wrong
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