Premium Only Content
This video is only available to Rumble Premium subscribers. Subscribe to
enjoy exclusive content and ad-free viewing.
Slope Area N Value Confirmation
5 months ago
25
Science
Do It Yourself
Hydrology
Slope Area
N value
Critical Depth
Indirect Flow Measurement
Peak Flow
Using USGS methods for computing N values and confirming with a critical depth flow value.
USGS review of slope areas:
Computation of Manning's n=0.39 * S^0.38 * R^-0.16
for slopes>10ft/mile
2-Xsec Slope Area:
Quick 2 xsec velocity head difference Q1*V2/V1 with increased velocity head downstream at x2.
other wise Snew=(H + delta hv)/L as delta V^2/2g If expanding use 1/2 delta hv.
2-Xsec Slope Area:
English Q=1.49*A*R^0.667*S^0.5/n
a=area, r=Wtop/Wetted_Perimeter, g=32.2
Computation of Manning's n=0.39 * S^0.38 * R^-0.16 for slopes>10ft/mile
K=a*r^2/3 * 1.486/n
hv-V^2/2g
Step1: S=H/L
Step2: Q=(K1*K2*S)^0.5
Step3: V1=Q/A1 and V2=Q/A2
Step3: dhv=(V1^2-V2^2)/2g
Step4: S=(H+dhv)/L or expanding S=(H+.5*dhv)/L
Step5: Qfinal=(K1*K2*S)^0.5
Loading 1 comment...
-
2:48
Steven Crowder
1 day agoCROWDER CLASSICS: What’s This? | Nightmare Before Kwanzaa (Nightmare Before Christmas Parody)
316K12 -
33:49
Quite Frankly
1 day agoThe Christmas Eve Midnight Telethon
118K22 -
2:12:46
Price of Reason
1 day agoAmber Heard BACKS Blake Lively Lawsuit Against Justin Baldoni! Is Disney CEO Bob Iger in TROUBLE?
69.1K24 -
1:01:17
The StoneZONE with Roger Stone
20 hours agoChristmas Edition: Why the Panama Canal is Part of the America First Agenda | The StoneZONE
139K51 -
18:12:15
LFA TV
1 day agoLFA TV CHRISTMAS EVE REPLAY
150K19 -
13:32
Scammer Payback
21 hours agoChanging the Scammer's Desktop Background to his Location
18.9K4 -
4:21
BIG NEM
1 day agoNikola Tesla's Secret to Cultivating Creativity & Genius
14.3K1 -
15:03
The Anthony Rogers Show
1 day agoAnthony Rogers - Live at Cusumano's Pizza (Upstairs)
11.3K1 -
4:33:48
tacetmort3m
1 day ago🔴 LIVE - THE ZONE KEEPS PULLING ME BACK - STALKER 2 - PART 15
75.7K13 -
22:45
Brewzle
1 day agoI Went Drinking In A Real Bourbon Castle
54.1K4