A hydrographic survey was performed on Lake Chui. Upon processing the data it was found that the cross sectional area of the lake can be modelled as a function of the depth using equation: A=84.9+8.4h+4.0ℎ 2
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A hydrographic
found that the cross sectional area of the lake can be modelled as a function of the depth
using equation:
A=84.9+8.4h+4.0ℎ
2
a. Assume value of depth of water then calculate the capacity of the lake in ?3
b. Calculate the increase in capacity of the lake if the heavy rainfall caused the
depth to the rise by 2 meters of your assumed depth in ?3
Step by step
Solved in 2 steps
- (Use Gumbel method) A river has following character: Average Q = 10,000 m^3/sec Standard deviation S = 3,000 m^3/sec What is the annual probability for discharge exceeding 15,000 m^3/sec? 0.064 0.47 0.22 0.3 0.21 0.022The following inflow and outflow hydrographs were observed in a river reach. Estimate the values of K and x.Note: Tryx = 0.2, 0.3, 0.4 onlyIf the coefficient of permeability for the soil is estimated to be k 1⁄4 0.05 cm/s, what is the average or discharge (Darcy) velocity of flow through the soil (the soil is located between points B and D) in cm/s? Use the format 2.222 x 10^(-4)
- 3) You are assigned to determine the Manning's n coefficient for sagebrush. In eastern Oregon where sagebrush grows, you construct a long trapezoidal channel with a bottom width of 10 feet, 1:1 side slopes, and a 0.001 longitudinal slope. You plant sagebrush on the bottom of the channel. For a uniform flow of 13 cfs the water depth is 1 foot. What is Manning's n? Your result is dependent on several choices you made in setting up the experiment, list two independent ones. If you were to change these, the value you calculate would change. lo ftA weir installed at the end of a rectangular channel controls the flow of water. The rate of flow is 0.62 m^3/s. If the error in measuring the head is 0.018m, determine the percentage error in the measured flow if the weir is a suppressed rectangular with L = 4.5m. A) 16.98% B 15.58% (c) 12.21% (D) 14.32%Estimate the water influx constant (B) for the following bottom-water-drive reservoir. Boundary pressure (at WOC) and water influx history data are as follows. Time (days) Boundary (psia) Cumulative Influx (1000RB) 30 60 90 120 150 180 210 240 pressure 3000 2956 2917 2877 2844 2811 2791 2773 2755 Water | 0 79 282 570 930 1354 1810 | 2287 2786 The reservoir is circular and has an approximate radius of 2000 ft. Other pertinent aquifer data include r,→, R = 2000 ft , h = 200 ft, k H= 50 md, k,= 2 md, µ = 0.395 cp, ¢ = 0.1, and c, = 8×10-6 psi!.
- Q In a proposed reservoir, the areas containing within the contours are: Contour (in m) 90 85 80 75 Area (in ha) 18 Using the method of end areas, calculate: (i) capacity of the reservoir when it is full at 100 m level; (ii) elevation of the water level when it is 60% full. Ignore the volume below RL 65 m. Give your remarks about the method of 'End Areas' 100 32 26 24 70 65 7 2): An irrigation canal having side slope 1:1 has bottom width of 3 m. it runs at a depth of 1 m with a bed slope of 1 in 2500. Manning's value of n = 0.028. Determine whether the canal will be silting or scouring or remain stable. Use Manning's and Kennedy's equations.Consider an impounding reservoir that is expected to provide for a constant draft of 448 million gallons per year. The following record of monthly mean inflow values is representative of the critical or design period .Find the storage requirement. • Mo= Month , I = Observed inflow Мо F A M J A N J F 54 90 10 7 8. 28 42 108 92 22 50 2. Σ 31
- Given is the cross-section of a stream with uniform flow having a slope of 0.007 and the roughness coefficient of the stream bed is 0.025. Determine: 1. a. Hydraulic radius b. Average velocity of the stream using Manning's coefficient and the corresponding discharge c. Average velocity of the stream using Kutter's coefficient and the corresponding discharge. 5.5 m 6.0 m 6.0 m 6.0 m 5.5 m 2.0 2.7 2.4 1.2Use the isohyetal method to calculate the average rainfall depth for the area given in table below. Isohyets (cm) 9 10 11 12 13 14 15 Area between Isohyets A (km²) 22 80 105 98 78 16 anal 0 m 6.Q3/ Determine the useful storage depth that used in hydroelectric power plant according to the information in the table below, assume penstock situation is above 5m from the dam base. 470 472 474 476 478 480 482 484 486 Contour elevation(m) Area(hectares) 219 227 240 257 278 303 330 362 396