4.1 FLOWTHROUGH WEIRS
DEFINITIONS – CLASSIFICATION OF WEIRS –
DISCHARGE OVER A RECTANGULAR WEIR AND
TRAPEZOIDAL WEIR – DERIVATION – SIMPLE
PROBLEMS – END CONTRACTIONS OF A WEIR –
FRANCI‘S AND BAZIN‘S FORMULA – SIMPLE
PROBLEMS –CIPPOLETTI WEIR – PROBLEMS –
NARROW CRESTED WEIR – SHARP CRESTED WEIR
WITH FREE OVER FALL – BROAD CRESTED WEIR –
DROWNED OR SUB MERGED WEIRS –
SUPPRESSED WEIR – STEPPED WEIR –
PROBLEMS -DEFINITION OF TERMS – CREST OF
SILL , NAPPE OR VEIN , FREE DISCHARGE –
VELOCITY OF APPROACH – SPILLWAYS
AND SIPHON SPILL WAY – DEFINITION.