Answered: Draw a Horton's Infiltration Curve,…

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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ΤΘ In a border-irrigation-system, the following information is given The border length is 300 m - The border width is 5 m -Qin = 18.6 l/s - Slope is 0.7% - (1 Manning's n = 0.2 The infiltration equation is D = 50.6, D in mm and t in minutes The data are shown in the following table Distance 0 30 (m) Advance 06 time (m) Recession 95 98 time (m) ☆ 60 15 ||| 90 120 150 180 25 34 48 65 80* *means that the irrigation gates have been closed at this time. If the net depth of irrigation (NDI) IS 70 mm, find the irrigation adequacy? 102 110 117 125 140 فلاتر 210 240 O 152 96 167 270 300 7 119 160 174 200 إضافة شرح... mum
Q3. It was rained on a basin, where the soil has a k constant of 1.7, an initial infiltration rate of 3.2 mm/hr, and an infiltration rate of 2.3 mm/hr minutes later. The precipitation depths versus time are tabulated below: t, hr 600 615 630 645 700 715 730 745 800 815 80 845 900 915 | ΣΡ, cm 0.0 0.4 2.0 3.8 5.0 5.0 5.0 UH, (m/s)/cm o 10 35 65 85 75 50 35 25 18 12 6. 2 a) Obtain Horton's infiltration equation (10 points), b) Calculate the depth of total infiltrated water, the depth of surface runoff, and the runoff coefficient (20 points), c) 30-minute unit hydrograph (UH) ordinates are also tabulated above. Obtaining 15-minute UH and neglecting the losses except for the infiltration, determine the direct runoff hydrograph. (30 point).
A calibration of a 12.5 mm circular sharped orifice in a vertical side of a large tank showed a discharge of 590N of water in 81 seconds at a constant head of 4.70 m. Measurement of the jet showed that it traveled 2.35 m horizontally while dropping 300 mm. Compute for Cc Cd and Cv
C PART ONLY
(a) Sketch a typical Streeter-Phelps oxygen-sag curve and state its limitations. dD (b) The rate of change of the dissolved oxygen deficit, ", is the net effect of the rate of dt re-aeration, given as – k D, and the rate of oxygen utilization, given as k,Le , where ko, ka and Lo are the re-aeration rate constant, the decay constant, and the ultimate BOD, respectively. Write the expression for the rate of change of the dissolved oxygen deficit. Then argue why the maximum deficit, De, occurring at the critical time, to, is given by: ka Le D. k.
The following are the data obtained in a stream gauging operation. A current meter with a calibration equation V = (0.32 N + 0.032) m/sec was used to measure the velocity at 0.6 depth. Using the mid-section method, calculate the discharge in stream. Distance from the right bank Depth 0 2 4 6 9 12 15 18 20 22 23 24 0 0.5 1.10 1.95 2.25 1.85 1.75 1.65 1.50 1.25 0.75 0 No. of revolutions 0 80 83 131 139 121 114 109 92 85 70 0 Time (Sec) 0 180 120 120 120 120 120 120 120 120 150 0
The two-dimensional distribution of pollutant concentration in a channel can be described by c(x, y) = 7.9+0.13x+0.21y−0.05(x^2) −0.016(y^2) −0.007xy Determine the exact location of the peak concentration with an initial guess (x0, y0)=(1,3) by 2 iterations of steepest decent method
Question No. (4): Answer with True or False for the following 1. Percolation is the movement of water within soil profile, a process that follows infiltration. 2. Berm is the horizontal distance left at ground level between the toe of the bank and the top edge of cutting 3. Volume of water relative to the total volume of fluids (air + water) This index ranges from zero in completely dry soil to unity in a saturated soil called Degree of Saturation 4. the emergency transition longitudinal slop of canal berm is 1:15 5. Irrigation is the artificial means of providing water to soil to ensure enough moisture essential for plant life and growth 7- Interception loss is that part of the precipitation that falls on plants and doesn't reach the ground. It evaporates (or sublimates) from leaves, near-ground plants and leaf litter or, to a lesser extent, is absorbed by plants Good luck 2
Solve the following: To determine the daily evaporation at lake, a USWB evaporation pan is maintained. The water level in the pan is 200mm at the beginning and is observed every day. Water is added if the water falls to about 17.5cm to the same depth during the first day. Estimate the daily pan evaporation for the 14-day period for which readings are summarized in the following table

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Draw a Horton's Infiltration Curve, given this data: Given data: fo = 300mm/hr fc = 60mm/hr (assume t=60 is where fc becomes constant) assume k = 4.8/hr