A sandy loam soil holds water at 140 mm/m depth between field capacity and permanent wilting point. The root depth of the crop is 30 cm and the allowable depletion of water is 35%. The daily water use by the crop is 5 mm/day. The area to be irrigated is 60 ha and water can be delivered at 28 litres per second. The surface irrigation application efficiency is 40%. There are no rainfall and ground water contribution. Determine:- (i) allowable depletion depth between irrigations (ii) frequency of irrigation (iii) net application depth of water (iv) volume of water required (v) time to irrigate 4 ha plot

A sandy loam soil holds water at 140 mm/m depth between field capacity and permanent wilting point. The root depth of the crop is 30 cm and the allowable depletion of water is 35%. The daily water use by the crop is 5 mm/day. The area to be irrigated is 60 ha and water can be delivered at 28 litres per second. The surface irrigation application efficiency is 40%. There are no rainfall and ground water contribution. Determine:- (i) allowable depletion depth between irrigations (ii) frequency of irrigation (iii) net application depth of water (iv) volume of water required (v) time to irrigate 4 ha plot

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

12) A soil with moisture holding capacity of 140 mm/m depth of available moisture profile. The root zone is 0.3 m and PAD= 35%. The daily water consumption is 5 mm/day. The irrigated area is 0.6 km2 and water can be supplied at 0.028 m3/sec. The irrigation application efficiency is 40%. Determine the frequency of irrigation. * O a) 2.94 days d) Otherwise O b) 4 days O c) 7 days
a 3-ha of cornfield is to be irrigated at a discharge of 250 lps. the average available water holding capacity is 140 mm/m soil, the management allowable deficit is 40%, and the rootzone depth is 0.5 m. the reference crop potential evapotranspiration is 5 mm/day and the crop coefficient is 0.8. assuming 70% application efficiency, the irrigation period should be
Wheat is to be grown in a field having a field capacity equal to A andpermanent wilting point is B. Find the storage capacity in 80cm depth ofsoil, if the dry unit weight of soil is 1.2 g/cc. If the irrigation water is to besupplied when the average soil moisture falls to 15%, find the water depthrequired to be supplied to field if the field application efficiency is 70%.What is the amount of water needed at the canal outlet if the water lost inthe water course and the field channel is 15% of the outlet discharge.
Q: Determine the area which can be irrigated using surface method of irrigation with a source of water having a discharge of 10000 litres per minute. The available moisture holding capacity of the soil is 180mm per metre and depth of root zone is 1.Im. Irrigation is done when 40% of available moisture is used. The total losses during irigation are 35% and peak daily moisture use is 4.5mm.
i. Assume that readily available moisture amounts to 150 mm/meter depth of soil profile. If consumptive use rate is 5mm/day what is the irrigation interval for a crop with 30 cm root zone.
A soil with moisture holding capacity of 140 mm/m depth of available moisture profile. The root zone is 0.3 m and PAD= 35%. The daily water consumption is 5 mm/day. The irrigated area is 0.6 km2 and water can be supplied at 0.028 m3/sec. The irrigation application efficiency is 40%. Determine the frequency of irrigation
.---. A stream of 150 litres per second was delivered from a canal and 110 litres per second were delivered to the field. An area of 2.2 hectares was irrigated in eight hours. The effective depth of root zone was 1.5 m. The runoff loss in the field was 445 m The depth of water penetration varied linearly from 1.5 m at the head end of the field to 1.1 m at the tail end. Available moisture holding capacity of the soil is 200 mm per metre depth of soil. Determine the water conveyance efficiency, water application efficiency, water storage efficiency, and water distribution efficiency. Irrigation was started at a moisture extraction level of 50%
Urgently need the solution: The water content of a field soil is to be increased to 21% from existing 14%. The density of soil is 1.4 g/cm3 and the depth of effective root zone is 76cm. Calculate the required depth of water to be irrigated.
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).
Wheat is to be grown in certain place, the climatic conditions of which are tabulated below, Determine evapotranspiration and consumptive irrigation requirement (C.I.R) of crop. Also determine field irrigation requirements (F.I.R) if water application efficiency is 80%. Use Blaney Criddle equation with crop factor of 0.8. Useful average Monthly %age of day/time hours Month Average-monthly Temperature (°C) Rainfall NOV 18.0 7.20 1.70 DEC 15.0 7.15 1.42 JAN 13.5 7.30 3.01 FEB 14.5 7.10 2.25
Wheat is to be grown in certain place, the climatic conditions of which are tabulated below, Determineevapotranspiration and consumptive irrigation requirement (C.I.R) of crop. Also determine fieldirrigation requirements (F.I.R) if water application efficiency is 80%. Use Blaney Criddle equation withcrop factor of 0.8.Month Average-monthlyTemperature (OC)Monthly %age ofday/time hoursUseful averageRainfallNOV 18.0 7.20 1.70DEC 15.0 7.15 1.42JAN 13.5 7.30 3.01FEB 14.5 7.10 2.25
Wheat is to be grown in the field having value of field capacity equal to 30% and permanent wilting point is 15%. If the dry unit weight of soil is 20 kN/m³ then maximum storage capacity will be [Take depth of soil is 80 cm] (a) 24 cm (c) 21 cm (b) 30 cm (d) 12 cm