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Home > Law > Jurisprudence and general issues > Operation and Maintenance of Irrigation Systems
Operation and Maintenance of Irrigation Systems

Operation and Maintenance of Irrigation Systems


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 edition. Excerpt: ...Augutt September October Normal Canal Stctio Ib, June n July C,0 Ve'locitylScale! /I JeU- jl. ij-/ _Foot _por_Sucond _ / LM'J" pt, ', Au," JjJxjJ"!'_?J T' b/1 "v8""TMi j 100 ISO 200 Discharge In Second Feet Fig. 13.--Curves used for rating stations not subject to control. correction will depend on the conditions of checking. The effect of checking shows in the change in the slope of the canal-water surface which is determined from the readings of the two gages. For any value of n, the fall between the gages and the correction for different amounts of checking, will, if plotted, fall on a smooth curve. Such a curve for the value of n found in the earlier season can be determined, as at that tune the value of n varies more slowly and the corrections are mainly due to the effect of checking. Gagings at weekly periods are required to give close results under such conditions. For each gaging the value of n is computed. The fall and correction for each gaging are plotted on the general fall and correction curve. A series of fall-correction curves, generally parallel in direction, are thus developed for the various values of n. The corrections for the daily gage readings are secured by using the fall-correction curve for the value of n found at the last gaging, entering with the observed fall for the daily gage readings and taking off the corresponding correction. This correction is then applied to the mean of the two gage readings for the day, the corrected mean gage being applied to the normal canal rating to give the corrected discharge. As an additional check, the daily corrections are plotted on a time curve for the operation season. The corrections due to checking are greatest at the beginning and end of the season when small discharges are...


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Product Details
  • ISBN-13: 9781150691126
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 98
  • Spine Width: 5 mm
  • Width: 189 mm
  • ISBN-10: 1150691123
  • Publisher Date: 01 Jul 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 191 gr


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