A river valley consists of 14 hectare of irrigable land tobe used for growing a crop whose peak consumptive useis 5 mm/day. If the average daily precipitation on thevalley is 20 mm/day of which 2.00 mm is available forthe crop and the irrigation system is operated for 12 hrsa day, determine the discharge in the irrigation stream isfield irrigation efficiency is 50%.

Given data, Area of irrigated land = 14ha Consumptive use = 5mm/day Field irrigation efficiency…

Answered: A river valley consists of 14 hectare…

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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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.
Draw a water balance for a rainfed maize crop. Precipitation is 700 mm of which 100 mm is intercepted and evaporates, 100mm runs off into stream. Of the remaining 500 mm that infiltrates into the soil ,100mm percolates to the subsoil and recharges aquifers . Assume the maize crop has a total coverage of 1000 hectares in a catchment , determine the contribution of the land to the annual downstream discharge of the catchment.
A field channel has a Cultivable Command Area of 2000 hectares. The intensity of irrigation of gram and wheat are 30% and 50% respectively. Gram has kor period of 18 days, kor depth 12 cm while, wheat has 18 days and 15 cm, The discharge required in the field channel to supply water to the command area during kor period is m³/s
1. One thousand two hundred and fifty cubic meters of water was delivered to a 10 ha farm for the month of June in which the consumptive use is estimated at 8 mm/day. The effective rainfall for the period was 150 mm. What is the irrigation efficiency? field tilain noint
The CCA of a distributary is 15,000 hectares. The intensity of irrigation for rabi is 40% and forkharif is 15%. The total water requirement of two crops is 40cm and 120cm and their periods of growthare 160 days and 140 days respectively. Determine the outlet discharge from average demandconsiderations. Also determine peak demand discharge assuming that the kor water depth for two cropsare 14 cm and 19cm & their kor periods are 4weeks and 2weeks respectively.
Q#5: The culturable command area for a distributary is 15000 ha. The intensity of irrigation for Rabi (wheat) is 40% and for Kharif (rice) is 15%. If the total water requirements of the two crops are 37.5 cm and 120 cm and their growth period is 120 days and 140 days (a) find the outlet discharge from average demand considerations (b) also find the peak demand discharge assuming kor water depths for the two crops 13.5 cm and 19 cm. And their kor periods to be 4 weeks and 2 weeks? Subject: Irrigation EngineeringNote: Write the answer in each part word format.
(ii) For border strip method of irrigation, determine the time required to irrigate a strip of land of 0.04 hectares in area from a tube well with a discharge of 0.02 cumec. The infiltration capacity of the soil may be taken as 5 cm/hr and the average depth of flow on the field as 10cm. Also determine the maximum area that can be Irrigated from this tube well.
A field channel has cultivable commanded area of 2000 hectares. The intensities of irrigation for gram and wheat are 30% and 50% respectively. Gram has a kor period of 18 days, kor depth of 12 cm, while wheat has a kor period of 18 days and a kor depth of 15 cm. The discharge (in m³/s) required in the field channel to supply water to the commanded area during the kor period is.
. The culturable command area of a channel is 4000 ha. The intensity of irrigation of a crop is 70%. The crop requires 60 cm of water in 15 days, when the effective rainfall is recorded as 15 cm during that period. Find: 1) The duty at the head of field. 2)The duty at the head of channel. 3) The discharge at the head of channel. Assume total losses as 15%.
We are to determine the seepage (infiltration) in a 250 hectare reservoir. The reservoir has 0.50 m^3/s of inflow, 0.3 m3/s of outflow, and total storage increase of 19600 m^3. A discharge of 0.1 m^3/s of water is coming out of reservoir to be used for irrigation of the around farms AUSGS gage next to the lake reservoir recorded a total of 20 mm Precipitation for the lake for a week. The evaporation loss, in mm is 24mm.T-0. Calculate the leakage (seepage) in mm for a week from this dam reservoir.(use 4 decimal in your answer donot put unit) e.g. 3.456mm put 3.4560 in your answer
A discharge of 0.15 cumecs is supplied into a canal at the head and 0.1 cumecs is delivered to field having an area of 1.5 hac. The Irrigation is started at a moisture extraction level of 60% of the available moisture and then extends for 10 hours. Determine the following efficiencies: water conveyance, water application, water storage, and water distribution. The following information are known: effective depth of r.z. = 1.7 m, runoff loss in the field = 425 m3 , water penetration depth varies linearly from 1.7 m at the head end of the field to 1.1 m at the tail end, W.H.C. = 25cm/m depth of soil.
precipitation is 700mm of which 100mm is intercepted and evaporates ,100mmm runs off into stream . Of the remaining 500mm that infiltrates into the soil, 100mm percolates to the subsoil and recharges aquifers . Assume the maize crop has a total coverage of 100 hectares in a catchment,determine the contribution of the land to the annual downstream discharge of the catchment (note make use of all data given and give explanation)

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