9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning...
Transcript of 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning...
![Page 1: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/1.jpg)
0
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Never Let Your Guard Down – Lessons for ALERT System Managers & Operators from the Colorado Floods of September 2013 Kevin Stewart, Manager Information Services & Flood Warning Program Urban Drainage and Flood Control District, Denver CO
![Page 2: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/2.jpg)
1
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
The Urban Drainage and Flood Control District
![Page 3: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/3.jpg)
Urban Drainage & Flood Control District Flood Warning Program
Serving the greater Denver/Boulder metropolitan area since 1979 in cooperation with NOAA’s National Weather Service
A Federal/Regional/Local Early Warning Partnership
![Page 4: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/4.jpg)
3
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
A Data Rich Environment The ALERT System 2010
2002
2012
1996
1969
2013
2012
2010
195 Rain Gages 99 Streamgages 26 Weather Stations
![Page 5: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/5.jpg)
4
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
THE FLOOD IMPACTS
Colorado’s 9/11 Event September 11-13, 2013 (the 3 worst days)
![Page 6: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/6.jpg)
5
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
The Rescue Operations: by Land…by Water…by Air
![Page 7: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/7.jpg)
6
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Search & Rescue
1,882 homes destroyed 17,500 damaged 1,000 businesses affected
![Page 8: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/8.jpg)
7
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
18,000 force to leave/26,000 households affected
![Page 9: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/9.jpg)
8
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Finally Safe
![Page 10: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/10.jpg)
9
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Damages
200 miles of highway/50 bridges/17 counties
![Page 11: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/11.jpg)
10
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
City of Boulder
![Page 12: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/12.jpg)
11
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Damages in Longmont
![Page 13: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/13.jpg)
12
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
STATEWIDE: $2-3billion...218 injured…9 fatalities
![Page 14: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/14.jpg)
13
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
SEPTEMBER 14, 2013 HEADLINE 500 people still reported missing
![Page 15: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/15.jpg)
14
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
THE RAINS
September 9-15, 2013
![Page 16: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/16.jpg)
15
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
9/11/2013
Water Vapor Animated
X
![Page 17: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/17.jpg)
16
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
7-day totals approaching 20” exceeded average annual amounts
![Page 18: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/18.jpg)
17
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Monthly Average Tip Count Summary
![Page 19: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/19.jpg)
18
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014 “1,000-year Rainfall”
Some very early findings from our NOAA friends September 17, 2013
Estes Park
Lyons
Boulder
Aurora
Longmont
Loveland
![Page 20: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/20.jpg)
19
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
A Rainfall Frequency Plot
![Page 21: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/21.jpg)
20
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Design Rainfall Comparison Note that the Justice Center ALERT gage did not measure >100-year rainfall
until the storm duration exceeded 3 hours.
Used by all design storms with the Colorado Urban Hydrograph Procedure
![Page 22: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/22.jpg)
21
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
![Page 23: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/23.jpg)
22
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
1% AEP i10m= 6.1 in/hr
![Page 24: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/24.jpg)
23
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
STREAMGAGES Vitally important on rare occasions
![Page 25: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/25.jpg)
24
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
USGS STREAMGAGE WITH LIVE VIDEO WEBCAM—SEPT. 12, 2013
Fourmile Creek near Orodell in Boulder County, Colorado
![Page 26: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/26.jpg)
25
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Stream water level peaks driven by the more intense periods of rainfall…no surprise here
![Page 27: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/27.jpg)
26
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Fourmile Canyon Creek 36-hour GARR (Gage Adjusted Radar Rainfall)
![Page 28: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/28.jpg)
27
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Fourmile Canyon Creek Radar-Rainfall 36-hour Time Series—Rains Came in Waves
![Page 29: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/29.jpg)
28
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Real-Time Rainfall/Runoff Model From GARR estimates for Boulder Creek watershed (September 11-12, 2013)
![Page 30: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/30.jpg)
29
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
What people want to know ASAP after floodwaters recede
Was this a 100-year flood? …a 1000-year flood? …or worse? INITIAL REVELATIONS: 1. Streamgages were of little help with quick answers 2. Rainfall frequency does not equal flood frequency 3. Few understand what they are asking
![Page 31: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/31.jpg)
30
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Peak Flow Estimates & Corresponding AEP Values AEP results vary widely.
April
15,
2014
20
14 U
DFCD
Ann
ual
Sem
inar
![Page 32: 9, 2014 Never Let Your Guard Down – Lessons for …...3 ALERT Users Group 25 th Flood Warning Systems Conference May 5-9, 2014 A Data Rich Environment 2010 The ALERT System 2002](https://reader034.fdocuments.in/reader034/viewer/2022050104/5f42cf1f8637f0769e24e469/html5/thumbnails/32.jpg)
31
ALER
T U
sers
Gro
up 2
5th F
lood
War
ning
Sys
tem
s Con
fere
nce
M
ay 5
-9, 2
014
Bad floods happen when we least expect at inconvenient times.
LESSONS
Rainfall frequency never equals flood frequency. People ask difficult questions. Have a good simple answer.
Do not underestimate the importance of streamgages.
Take the time to build relationships.
Be careful where you park your SUV.
Never let your guard down.