Ex4-5: Calculate the amount of needed water to irrigate farm of 160 donum area through the duration 1st April to 31th August if the annual consumptive use 0.9 m, the percentage of consumptive use through these month and effective rainfall are illustrated in table below assume 48% irrigation efficiency and 20% conveyance losses) Month Consumption percentage% Effective rainfall, cm April 8.6 0.8 May 9.3 1.2 June 13.2 3.5 July 18.3 3.1 August 17.6 2.1

Ex4-5: Calculate the amount of needed water to irrigate farm of 160 donum area through the duration 1st April to 31th August if the annual consumptive use 0.9 m, the percentage of consumptive use through these month and effective rainfall are illustrated in table below assume 48% irrigation efficiency and 20% conveyance losses) Month Consumption percentage% Effective rainfall, cm April 8.6 0.8 May 9.3 1.2 June 13.2 3.5 July 18.3 3.1 August 17.6 2.1

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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Determine the evapotranspiration and irrigation requirement for wheat , if the water application efficiency is 65 % and the consumptive use coefficient for the growing season is 0.8 . Use the following data :
Q.2 Duty Delta A field having culturable commandable area equal to 1046 hectares is used for growing of crops. If the intensity of irrigation of rabi and kharif crop are 56% and 48% respectively, what will be the ratio of depth of water required for rabi crop to kharif crop (up to 2 decimal place). Assume the base period for rabi and kharif crop are 64 days and 45 days respectively.
30
.3. Table below gives the necessary data about the crop, duty of water and the nder each crop commanded by a canal taking off from a storage reservoir. Taking a time factor for ared al to be (12/20), calculate the discharge required at the head of the canal. If the capacity factor is 08. determine the design discharge. Base period (days) Duty of water at the head of the canal Area Crop (hectares) (hectares/cumec) 900 580 320 Sugar cane 580 150 90 Overlap for sugar cane in hot weather 1 600 750 120 Wheat (Rabi) 2 000 600 120 600 Bajra (Kharif) 320 120 Vegetables (Hot weather)
Example Problem Water budget for a lake provides following observations: Precipitation, P = = 43 in./yr. Evaporation, E = 53 in./yr. Inflow to Lake, Qin = 1 in./yr. Outflow from Lake, Qout = 173 in./yr. Change in Lake storage, AS = -2 in./yr. Find the net groundwater flow. Solution: E SWIn GWin PPT Evap SW Out GWout
Problem-2 In an irrigated area 12 m³/s of water is diverted to a 0.32 km² field area for four hours. The soil moisture measurement in the field done after irrigation showed that 0.4 m of water has been stored in the root zone. What is the water application efficiency?
g. how does the crop water requirement vary with stage of crop growth and season of the year?
Q4-7/ An agricultural farm is cultivated by crops in August. The available data are: (dw)A = 0.08 (m of water depth/ each Irrigation process) during AUGUST and ET = 16 (mm of water depth/day) during AUGUST. Find the Irrigation Cycle of the Farm Ic (day/each Irrigation process) during AUGUST. ANSWER/Ic = 5 (d/each irrigation process) during AUGUST.
R=101