(b) The storage and discharge characteristics for a reservoir are given below in Table-1. Consider the routing period to be 6 hours. The dam has an unregulated opening 5 m high with its elevation at 125 m and a spillway-crest elevation of 355m. Discharges for pool elevations above 355 m include both regulated and spillway discharges. Route by the Storage Indication method the inflow hydrograph given below in Table-2. Determine the attenuation and lag times. Table-1: Storage and Discharge Characteristics of a Dam Storage (x10° m³) 0.210 0.900 Table-2: An Inflow Hydrograph Discharge Rate (m³/s) Elevation Time Discharge (hrs) | Rate (m/s) (hrs) | Rate (m³/s) 360 (m) Time Discharge 125 0.02 0.13 130 0.00 20 114 140 0.45 1.59 06 60 120 330 160 2.70 2.40 12 220 126 289
(b) The storage and discharge characteristics for a reservoir are given below in Table-1. Consider the routing period to be 6 hours. The dam has an unregulated opening 5 m high with its elevation at 125 m and a spillway-crest elevation of 355m. Discharges for pool elevations above 355 m include both regulated and spillway discharges. Route by the Storage Indication method the inflow hydrograph given below in Table-2. Determine the attenuation and lag times. Table-1: Storage and Discharge Characteristics of a Dam Storage (x10° m³) 0.210 0.900 Table-2: An Inflow Hydrograph Discharge Rate (m³/s) Elevation Time Discharge (hrs) | Rate (m/s) (hrs) | Rate (m³/s) 360 (m) Time Discharge 125 0.02 0.13 130 0.00 20 114 140 0.45 1.59 06 60 120 330 160 2.70 2.40 12 220 126 289
Chapter2: Loads On Structures
Section: Chapter Questions
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
Transcribed Image Text:(b) The storage and discharge characteristics for a reservoir are given below in Table-1. Consider the routing period to be 6
hours. The dam has an unregulated opening 5 m high with its elevation at 125 m and a spillway-crest elevation of 355m.
Discharges for pool elevations above 355 m include both regulated and spillway discharges. Route by the Storage
Indication method the inflow hydrograph given below in Table-2. Determine the attenuation and lag times.
Table-l: Storage and Discharge Characteristics of a Dam
Discharge Rate
(m³/s)
0.02
Table-2: An Inflow Hydrograph
Elevation
Storage
(x10° m³)
(m)
Time
Time Discharge
Discharge
Rate (m/s) (hrs) Rate (m³/s)
125
0.210
(hrs)
0.00
130
0.13
0.45
0.900
20
114
360
140
1.59
06
60
120
330
160
2.70
2.40
12
18
220
126
280
180
7.50
3.03
350
132
200
200
15.50
3.54
24
380
138
160
220
30.0
3.97
30
430
144
150
130
240
50.0
4.54
36
480
110
260
75.0
4.75
42
530
156
90
280
105.0
5.10
48
610
162
60
300
142.0
5.40
54
670
168
50
320
185.0
5.70
60
730
174
30
340
230.0
6.00
66
780
180
22
350
256.0
6.15
72
870
186
21
355
268.0
6.19
770
192
20
280.0
84
700
670
360
6.30
198
19
365
293.0
6.39
90
204
18
370
306.0
6.43
96
630
210
17
375
321.0
6.49
102
550
216
17
390
360.0
6.70
108
490
222
17
400
392.0
6.85
420
456.0
7.15
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