Pocketbook of Useful Formulæ and Memoranda
for Civil and Mechanical Engineers

28Ö OF ENGINEERING FORMULÆ. Weirs on Indian Rivers. DIAGRAMS SHOWING SECTIONS OF WEIRS ON THE SOANE AND JUMNA EIVERS. SOANE WEIR. Jumna Weir (Agra Canal) The Soane Weir is on a better bed than the Jumna Weir, which is on a very fine sand mixed with mica aud very easily eroded. Both weirs are formed of large blocks of loose stone with nucleus walls which run through their entire length. The walls of the Soane Weir are 5 feet thick, supported on rows of piles sunk 10 feet deep into the bed of the river. The walls of the Jumna Weir are 4 feet thick, built on the river bed. The Soane Weir is 8 feet high at its crest. The Jumna Weir is 10 feet high at its crest-