The following cropping patterns is evolved under a reservoir Crop Season Base Period Intensity Crop ratio Outlet factor (Ha/cumecs) (days) (%) Sugarcane Perennial 360 800 60 4 Paddy Kharif 120 800 80 2 Cotton Kharif 210 1200 2 Wheat Rabi 120 1800 75 3 Vegetable Summer 100 750 60 1 GCA 30000 Ha (80% of which is culturable) datas are: (i) Extra water for the period of peak water use = 20% (ii) Time factor = 13/20= 0.65 (iii) Conveyance losses = 20% Determine the following: (i) Capacity factor for the main canal (ii) The design discharge at the head of the main canal 23.11 60

The following cropping patterns is evolved under a reservoir Crop Season Base Period Intensity Crop ratio Outlet factor (Ha/cumecs) (days) (%) Sugarcane Perennial 360 800 60 4 Paddy Kharif 120 800 80 2 Cotton Kharif 210 1200 2 Wheat Rabi 120 1800 75 3 Vegetable Summer 100 750 60 1 GCA 30000 Ha (80% of which is culturable) datas are: (i) Extra water for the period of peak water use = 20% (ii) Time factor = 13/20= 0.65 (iii) Conveyance losses = 20% Determine the following: (i) Capacity factor for the main canal (ii) The design discharge at the head of the main canal 23.11 60

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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has The crop coefficient curve (Kc) of a crop been developed for a location (see the figure below). The crop is planted on April 11 and harvested on Oct. 15. The estimate potential crop evapotranspiration (ET) using the Penman- Monteith method is given below. Estimate the evapotranspiration from the crop over the entire growing season for this location. Assume the is well watered and there is no significant water stress. crop Month ETo (mm/day) 1.2 12 1.0 10 Crop coefficient, K 0.8 0.6 D A B 0.4 April 3.5 May 4.0 June 4.5 0.2 July 5.0 Aug 5.0 0 Sep 3.0 ° 20 40 60 80 100 Growing season, % Oct 2.0
Q1: The water content at the field capacity is 27.2% by weight and it was 19% by weight for irrigation (wilting point), depth of the root zone is 0.92m and the apparent specific gravity is 1.3. Find: 1. The depth of water required to reach moisture in this soil to its field capacity. 2. The time required to irrigate 12 mishara in discharge equal to 75 €/s and 65% the efficiency of irrigation (Ea).
Elementary beam theory predicts that the axial bending stress ox in a prismatic beam is given by: ox = (M.I,M,L)y+(M,I.-M.I.) (1,1₂-13/2) where My and M₂ are bending moments applied to a cross-section, and where ly, lz and lyz are second moments of area in the usual notation (Oxyz is a Cartesian coordinate system in which the x axis corresponds to the centroidal axis of the beam). (iii) A Z--section beam has the cross-section shown overleaf (see Figure QB2). The second moments of area of the section about the y and z axes are given as;; ly = 1.12x106mm² and I₂ = 2.87x106 mm4. Show that lyz = 1.35x106 mm² (use the parallel axis theorem). 100 60 10 y -10 10 60 Figure QB2 N (iv) Bending moments Mz = 2.0 kNm and My = 0 kNm act on a cross- -section of the beam of part (iii). Obtain an expression for the bending stress and sketch the orientation of the neutral axis with reference to the y and z axes. What is the maximum tensile value of the axial bending stress and where does it occur?
TQ2]// [A]: Given; the following data for an irrigated field. - Field capacity =20%) by wt. - Wilting point=10%) by wt. - Percentage of allowable depletion of available moisture content =65% - Effective rainfall = 20 mm. - Apparent specific gravity of the soil =1.5. Determine the net irrigation requirement per meter depth of soil. [B]: Prove that: Pw x 100 Pww Pw + 100
Find the delta for a crop if the duty for a base 181. period of 110 days is 1400 hectares/cumec.
Yield analysis for a large surface water reservoir is usually based on historical climatic and hydrological data. Discuss how the use of this historical data may lead to the derived sustainable yield of water being an unreliable indicator of the quantity of water that can be withdrawn from the reservoir.
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Freq.of irrigation.
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