River and Canal Engineering, the characteristics of open flowing streams, and the principles and methods to be followed in dealing with them. — 3. Weirs on Sandy or Porous Soil.—If the channel is very soft or sandy the weir may be built on one or more lines of wel

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River and Canal Engineering, the characteristics of open flowing streams, and the principles and methods to be followed in dealing with them. 3. Weirs on Sandy or Porous Soil.—If the channel is very soft or sandy the weir may be built on one or more lines of wel · ch 48/78

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