Presentation on theme: "By P.Kandasamy BTE – 06 -014. K= empirical seasonal consumptive use coefficient for the growing season F= sum of the monthly consumptive use (f) for the."— Presentation transcript:
K= empirical seasonal consumptive use coefficient for the growing season F= sum of the monthly consumptive use (f) for the growing season k = empirical consumptive use crop co efficient for the month f = t x p/100 t = mean monthly temperature p = monthly daylight hours expressed as per cent of daylight hours of the year.
MonthsMean monthly temperature, o F (t) Monthly crop co-efficient (k) from table Percent day light hrs (p) from table Monthly consumptive use (inches) k.t.p/100 Jan 77.3188.8.131.52 Feb 81.90.557.43.33 Mar 82.670.68.444.18 Apr 88.20.658.434.83 May 184.108.40.2065.59 June 89.460.758.575.75 July 88.380.88.846.25 Aug 86.3150.88.746.03 Sep 87.2150.78.265.04 Oct 84.920.68.294.22 Nov 80.510.557.893.49 Dec 81.410.58.083.28
http://books.google.co.in/books?id=yANwmTjf588C&pg=PA103&lpg =PA103&dq=blaney+criddle+method&source=bl&ots=64j68csYbW&si g=cDIpxuNIWiWntQAqFRbkauXo- YE&hl=en&ei=YvXISZnmIsOGkQWkm4XmAg&sa=X&oi=book_result &resnum=9&ct=result www.nih.ernet.in/Method3.htm Irrigation theory & practice by A M Michael