Congressional Edition Volume N . 6574

Congressional Edition Volume N . 6574

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1914 edition. Excerpt: ...1913, the lake level had a decided downward trend, and this in spite of the fact that during these periods the rainfall was at times quite pronounced. The circumstance affords a great factor of flood storage safety, inasmuch as, in the operation of the lake as a reservoir, only the great storm periods must be considered in avoiding lake overflow. Attention is now invited to the diagram entitled "Lake Okeechobee Storage, Diagram June 1-December 31, 1912." On this sheet the lake levels have been converted into their equivalents in terms of billion cubic feet of storage and the datum has been lowered to elevation 16 above tide. The diagram indicates what would have taken place in the lake had the storm occurred under the improved conditions, with the lake level drawn down to 16 at the time of storm onset. It will be seen that the maximum storage from the great rainfall of June, 1912, together with the run-off from the rains of less magnitude which followed it, amounts to 53,000,000,000 cubic feet and would have raised the lake level to only 18.8. Above this, to the point of overflow, there is a storage capacity of about 3 feet, which is equivalent to approximately 60,000,000,000 feet of storage, or an excess capacity greater than that required for the entire storage of the run-on from this storm. In other words, had the lake been at level 16 when this storm started and had the storm produced twice the run-off that actually occurred, the lake would have had sufficient capacity to store it all without great overflow. There have been no storms within the period of record of anything like twice the depth of that of June, 1912. In fact only one storm within the record was greater--viz, that of October, 1910. The October storm was more

Product details

  • Paperback
  • 189 x 246 x 2mm | 82g
  • United States
  • English
  • black & white illustrations
  • 123692357X
  • 9781236923578