WSP07331

• File Number: 8220.200.05.J
• Description: Hoover Dam/Lake Mead/Boulder Canyon Project
• Basin: Colorado Mainstem
• Date: 1/1/1938
• Author: USDOI/BOR
• Title: Boulder Canyon Project Final Reports: Part VI/ Bulletin 2 - Model Studies of Penstocks and Outlet Works
• Water Supply Pro - Doc Type: Report/Study

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CONTENTS (Continued)

ACCURACY OF RESULTS
SECTION PAGE
22. General........ ..... ................................ ..................................................... 64
23. Errors in mean velocity head__...mn....u__.......__.____....___uh........n....___n__........._ 65
24. Errors in determination of hydraulic grade..........____..__...__.__.............____..... 67
25. Errors in obtaining energy grade..__n___n.__mmn...nmn...........................__m.. 70
26. Errors in straight pipe 1088e8.........__......____........_________.......___.....__.__........n"__ 70

27. Entrance losses ._..................__n_n_.....__....................h.__..___......_n...................__. 72"
28. Branch loss error!!\.._m_......._h.........___...___._m.............._u_m......_.___m_.___..____..__.. 73
29. Conclusions on errors..___m....._...___........_______...........__h.................................... 74

CHAPTER III-INTAKE TOWER AND PENSTOCK
ASSEMBLY

INTAKE TOWER MODEL

30. Introduction .__......__._.....______...__.__..__........____....................__.......nd''''..'''d__''...... 77
31. Apparatus .......................................................................................................... 77
32. Analysis of losses in tower.........n__...........__.__......................................__....... 83
33. Total losses through tower............__......__.............__.............__....____......__.......__. 86
34. Trashrack losses ....____...............00.__...__.......____.......____00.......__.__.............00__........ 90
35. Gate entrance 10sses__......__.................._.....___...__...........____....__..____........_......__... 90
36. Head required to change direction of flow..__............__.__....__....................... 92
37. Distribution 'of discharge through upper and lower gates........._____...... 96
38. Relation of dt" and Dl to discharge.............._.................__.............................. 98

PENSTOCK ASSEMBLY

39. Apparatus ......................................................................................... ................ 99
40. Pressures at base of tower....._.__......____....__...........__....__.mn.....__.........__........._ 101
41. Bend losses ....__........__.__..d..__......n__...__.__.__..........h....n...__....,.....__.....__.......__..... 103
42. Tests on penstock assemhly...........____..........__....._____.......__n.......__.......__.......... 105
43. Conclusions ......__.,..__...........____........__.40......__.__..__.....__..........__........__......____.....__. 10'6

INTAKE TOWER ELECTRIC-ANALOGY STUDIES

44. Introduction ..__..____......00.....__.__...........__.__.__.....____.......__...00........__00__....____....__.... 107
45. Apparatus ..................:....................................................................................... 107
46. Section of tower nearest the river....m..........................h'mm.....__.............__ 110
47. Section of tower nearest the canyon wall........................................__.__....... 113
48. Conclusions .__..__.......__.__..____.__.._.....__.........__...__....__.__.__.........,.__.__......__.............. 118

CHAPTER IV-TESTS ON TUNNEL-PLUG OUTLET

TUNNEL-PLUG OUTLET MODEL
49. Introduction ...................................................................................................... 119
50. Results on 1;106.2 mode!.................................................................................. 122
51. Results on 1 :20 mode!...................................................................................... 123
52. Results on 1 ;60 mode!.......... ........................................................................... 125
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