Ex.3: length of furrow 200m , discharge of furrow 1.5 Lps, water advance function X = 5 ta, infiltration equation I = 115. 2t-0.5, I in Lit/hr/m ,t in min , furrow spacing, S= 80 cm ;calculate: a) Application time in which average infiltration depth 100mm. b) Application efficiency if the needed irrigation depth 100mm. c) Volume of deep percolation ,average depth of infiltration ,its percentage from gross depth. d) Volume of runoff ,average depth of runoff , its percentage from gross depth.

Ex.3: length of furrow 200m , discharge of furrow 1.5 Lps, water advance function X = 5 ta, infiltration equation I = 115. 2t-0.5, I in Lit/hr/m ,t in min , furrow spacing, S= 80 cm ;calculate: a) Application time in which average infiltration depth 100mm. b) Application efficiency if the needed irrigation depth 100mm. c) Volume of deep percolation ,average depth of infiltration ,its percentage from gross depth. d) Volume of runoff ,average depth of runoff , its percentage from gross depth.

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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Paragraph Problem 1: A pipe is laid horizontally and filled with soil, with its open end being saturated. With the given data, solve for its infiltration in 36mins if the soil column had been initially placed upright with its upper surface saturated. Area of the pipe's cross section = 212.6cm2 Infiltrated by 2126cm? of water after 26mins Hydraulic conductivity is 0.001cm/s (Final answer should be in 4 decimal places.) Problem 2: With the given data, solve for the infiltration rate and cumulative infiltration after 360mins on a sandy clay soil. Assume water is ponded to a small but negligible depth on the surface. Moisture Content of the soil = 34.5% Residual Moisture Content of the soil = 26% (Final answers should be in 4 decimal places.) The table will be provided in page 2 Problem 3: Using the data from Problem 2. What is its ponding time if: a) Intensity of rainfall is 0.000126cm/s. b) Intensity of rainfall is 5.8344cm/d. (Final answers should be in 4 decimal places.) Problem 4:…
Suppose the parameters for Philip's equation are sorptivity, S = 15 cm/hr!/2 and K= 5cm/hr. A uniform rainfall causes ponding after 20 minutes. Determine the infiltration rate at time t=1 hr. Also compute the cumulative infiltration for the first hour of the rain.
instantaneous infiltration rate can be estimated by the equation, f= 0.5(a / +0.5) + b, where 'a' and 'b' are constants and 't' is the time elapsed from the beginning of the storm. find total infiltration during 10 hours if a=5 mm/hº.5 and b = 10 mm/h.
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A water treatment plant is designed to treat 0.25 m/s of turbid water. Rectangular horizontal flow settling units and rapid sand filtration units are designed for the following parameters. Sedimentation Tank : (1) Detention time 4 hrs. %3D (2) Over flow rate = 20 m/m2/d %3D (3) Length : Breadth 4: 1 Filters : (1) Number of filters = 4 (2) Rate of filtration = 5 m2/m/hr (3) Backwash rate = 10 Um2/se as= 1A) (4) Length : Breadth = 2: 1 (a) Determine the dimensions of the settling tank (b) Determine the length and breadth of the filter unit (c) Flow rate in the washwater trough, if two troughs are provided in each filter (d) Assuming ideal conditions of settling, determine the percentage fraction of solids with settling velocity 0.1 mm/s, removed in settling tanks.
Ex 12-6: agricultural land subjected to heavy rainfall of 10 days duration which caused groundwater recharge of 3mm/day. This water was drained by perforated pipes 20cm diameter laid at 2m depth below soil surface. If the depth of impervious layer 8m .find the spacing of drains to maintain the permissible groundwater table 1.5 m below soil surface. The hydraulic conductivity 0.5 m/day. Use any available equations (Hooghoudt Kirkham and Dagan)
Lli 3 Find the infiltration rate if the initial rate = 1.3 in/hr. and the final rate = 0.2 * ?in/hr, k= 0.35-hr. after 0.5 hr. and 1 hr. using Hortonz equation 1.29, 1.12 O 1.43, 1.29 1.43,1.12 O
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Determine the water-application efficiency, the water-storage efficiency, and the water-distribution efficiency for the following conditions: stream of 80 lps delivered to the field for 5-hours, runoff averaged 40 lps for 2.5 hr, depth of root zone was 1.8 m, depth of penetration varied linearly from 1.8 m at one end to 0.6 m at the other end of the field. Ans. 76.5%, 66.7%, 90.6%