Using the graphical (Rippl) method, determine the capacity of a storage reservoir to maintain a constant water supply (draft) of 40 m³/s given the following monthly mean- runoff values 31 29 Month Jan Feb Mean flow (m/s) 60 45 31 Mar 35 30 Apr 25 31 May 15 30 Jun 22 31 Jul 50 31 30 31 Oct Aug Sep Dec 80 105 90 80 70 30 Nov

Using the graphical (Rippl) method, determine the capacity of a storage reservoir to maintain a constant water supply (draft) of 40 m³/s given the following monthly mean- runoff values 31 29 Month Jan Feb Mean flow (m/s) 60 45 31 Mar 35 30 Apr 25 31 May 15 30 Jun 22 31 Jul 50 31 30 31 Oct Aug Sep Dec 80 105 90 80 70 30 Nov

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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Partc
The amount of water flowing from a certain catchment area at the proposed dam site are tabulated below. Determine. 1) The minimum capacity of the reservoir if water is to be used to feed the turbines of hydropower plant at an uniform rate and no water is to be spilled over Inflow Monthly (* 105 m³) Col. 1 Col. 2 January 2.83 February 4.25 March 5.66 April 18.4 May 22.64 June 22.64 July 19.81 August 8.49 September 7.1 October 7.1 November 5.66 December 5.66 Sum 130.24x105
Hydrology: i need the answer quickly i need all the steps, i need the answer in Handwritten.
The given table shows a unit hydrograph of 2-hour duration. Derive 6-hour unit hydrograph for the same catchment. Time (hours) 0 2 4 6 8 10 12 14 16 18 Flow (m3/sec) 0 76 105 123 123 +130 110 76 23 10 0
Determine the area of the watershed whose unit hydrograph is depicted in the table below. 3 4 Time (hr.) UH Ordinates (m/s-cm) 2 36 6 7 12 24 18 12 6
6 The ordinates of a 6-h unit hydrograph are as given below: Time (b) 6-h UH 12 18 24 30 36 42 48 54 60 75 25 50 100 87.5 75 62.5 50 37.5 25 72 66 72 78 12.5 0 0 ordinates (m3/s) Calculate the resulting hydrograph (flood hydrograph) due to storm of rainfall excess of 2 cm during the first 6 hours and 4 cm during the second 6 hours interval. The base flow can be assumed to be 25 m³/s constant throughout.
Problem 3 The table below contains the data for a one-hour unit hydrograph. Time Q (hr) (cfs/in) 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 0 145 246 359 979 432 246 134 65 32 0 (a) Determine the area of the watershed to which this unit hydrograph corresponds. Report your answer in acres. (b) Assume a very intense 3-hour storm occurs shortly after a rainy period, so the ground is very saturated. The runoff from the first one-hour interval of the storm totals 0.5 in., the runoff from the second one-hour interval is 2.5 in, and the runoff from the third one-hour interval totals 1.7 in. The baseflow during and after the storm is 80 cfs. Derive the storm hydrograph for this 3-hour storm. table that clearly indicates how you used the unit hydrograph, sample calculations Provide a with sufficient explanation, explanatory sketches, and a graph of the storm hydrograph. (c) Determine the peak discharge that will occur in the river if this 3-hour storm occurs.
Table Q4 shows the details of the storm hydrograph with the corresponding direct discharge. The given time interval is 3 hours between the readings. Q4 Table Q4 Excess rainfall (mm) 11 Time (hr) Direct discharge (m³/s) 3 70 28 230 9. 30 600 12 1400 15 2380 18 3300 21 4880 24 6320 27 3305 30 350 33 300 36 100 By using the convolution method, determine the unit hydrograph ordinates. (a) (b) Illustrate the unit hydrograph.
Derive and plot 3-hour Unit hydrograph for a stream which drains an area of around (401) km2. Time-discharge data of the storm is given is in Table. Assume the base flow as 2 m3 /sec. Time (Hrs.) 0 3 Flow (m³/s) 2 6 6 9 11 13 12 15 18 21 10 8 6 4 24 2
Example 4. Following are the ordinates of a storm hydrograph of a river draining a catchment area of 423 km² due to a 6-h isolated storm. Derive the ordinates o f a 6-h unit hydrograph for the catchment Time from start of storm (h) -6 0 6 12 18 24 30 36 42 48 Discharge (m³/s) 10 10 30 87.5 115.5 102.5 85.0 71.0 59.0 47.5 Time from start of storm (h) 54 60 66 72 78 84 90 96 102 Discharge (m³/s) 39.0 31.5 26.0 21.5 17.5 15.0 12.5 12.0 12.0
Annual rainfall (cm) runoff (cm) Year Annual Annual Year Annual rainfall (cm) runoff (cm) 1975 118 54 1986 75 17 1976 98 45 1987 107 32 51 1977 1978 1979 112 97 1988 75 15 1989 1990 41 93 28 84 21 129 48 1980 91 32 1991 1992 1993 153 76 1981 138 66 92 27 1982 89 25 84 18 1983 104 42 1994 121 52 1984 80 1 1995 95 26 1985 97 32