Canadian Dam Association Bulletin - Winter 2018 - 18

locations, a relationship between
the two locations was established.
For this study, gridded precipitation
frequency climatologies developed
for this project domain were used to
develop relationships and quantify
orographic effects.
A major component of the OTF
process is the assumption that the
relationship between precipitation
frequency values in areas of similar meteorology and topography

(transpositionable regions) are a reflection of the difference in orographic
effect between the two locations being
compared. It is also assumed that the
influence of terrain is the primary
contributing factor to the variability
in the relationship between precipitation climatology values at two distinct
point locations of interest.
The orographically adjusted rainfall
for a storm at a target (grid point) location may be calculated by determining

BUOYS - FLOATS - CHANNEL MARKERS

Oval
Floats

Round
Floats

Float Collar Can & Regulatory Buoys / Channel Markers

Call l 800.899.2977
18
463383_Worthington.indd
1

Click l www.tuffbuoy.com

the relationship between the climatological precipitation depth at the
source storm location (i.e. the location
where the historic storm occurred)
and the corresponding depth at the
target location. The orographic effect
on rainfall is quantified as the OTF
and defined as the ratio of the 100-year
24-hour climatological precipitation
depth at the storm center location to
the target grid point location.

4. PMP STORM
IDENTIFICATION
A comprehensive storm search
was conducted using previous storm
search results from several AWA
site-specific PMP studies, discussions with members of the review
board, and evaluating storm reports
and PMP studies in the region for
significant events. This included an
analysis of all the storms in regions
that are meteorologically and topographically similar to the Elbow River
basin. Discussion with the review
board members and Stantec personnel
identified other rainfall events which
were important to the basin for both
calibration and PMF determination.
The primary search area included all
geographic locations where extreme
rainfall storms similar to those that
could occur over the Elbow River
basin have been observed. The search
area extended from northern Alberta
and British Columbia (~50°N) to central Wyoming (~42°N) and from the
crest of the Rocky Mountains east to
approximately 610 meters in elevation (Figure 4). This ensured a large
enough area was searched to capture
all significant storms that could potentially influence PMP values for
the basin.
4.1. Final Storm Selections
Used for PMP
The primary search began with
identifying hourly and daily stations
that have reliable rainfall data within
the storm search area described previously. These stations were evaluated to identify the largest 1- and
6-hour and 1-, 2-, 3-day precipitation
totals. Other reference sources were

View past issues of2/23/10
the CDA
Bulletin
11:03:43
AM online at www.naylornetwork.com/cda-nxt/


http://www.tuffboom.com http://www.tuffbuoy.com http://www.naylornetwork.com/cda-nxt/

Table of Contents for the Digital Edition of Canadian Dam Association Bulletin - Winter 2018

BOARD OF DIRECTORS
PRESIDENT’S MESSAGE
UPDATING PMP FOR THE ELBOW RIVER: COMPLEX TERRAIN, UNIQUE SOLUTIONS
KELOWNA 2017
CDA AWARDS
ANNUAL GENERAL MEETING 2017
YOUNG PROFESSIONALS UPDATE
DAMS AND DIKES, WIKI STYLE
2017 FINANCE REPORT
CDA 2018 CONFERENCE: THE MANAGEMENT OF AGING DAMS
CDA NEWS BRIEF
BUYERS’ GUIDE AND TRADE LIST
Canadian Dam Association Bulletin - Winter 2018 - Intro
Canadian Dam Association Bulletin - Winter 2018 - cover1
Canadian Dam Association Bulletin - Winter 2018 - cover2
Canadian Dam Association Bulletin - Winter 2018 - 3
Canadian Dam Association Bulletin - Winter 2018 - 4
Canadian Dam Association Bulletin - Winter 2018 - 5
Canadian Dam Association Bulletin - Winter 2018 - 6
Canadian Dam Association Bulletin - Winter 2018 - BOARD OF DIRECTORS
Canadian Dam Association Bulletin - Winter 2018 - PRESIDENT’S MESSAGE
Canadian Dam Association Bulletin - Winter 2018 - 9
Canadian Dam Association Bulletin - Winter 2018 - UPDATING PMP FOR THE ELBOW RIVER: COMPLEX TERRAIN, UNIQUE SOLUTIONS
Canadian Dam Association Bulletin - Winter 2018 - 11
Canadian Dam Association Bulletin - Winter 2018 - 12
Canadian Dam Association Bulletin - Winter 2018 - 13
Canadian Dam Association Bulletin - Winter 2018 - 14
Canadian Dam Association Bulletin - Winter 2018 - 15
Canadian Dam Association Bulletin - Winter 2018 - 16
Canadian Dam Association Bulletin - Winter 2018 - 17
Canadian Dam Association Bulletin - Winter 2018 - 18
Canadian Dam Association Bulletin - Winter 2018 - 19
Canadian Dam Association Bulletin - Winter 2018 - 20
Canadian Dam Association Bulletin - Winter 2018 - 21
Canadian Dam Association Bulletin - Winter 2018 - 22
Canadian Dam Association Bulletin - Winter 2018 - 23
Canadian Dam Association Bulletin - Winter 2018 - 24
Canadian Dam Association Bulletin - Winter 2018 - 25
Canadian Dam Association Bulletin - Winter 2018 - KELOWNA 2017
Canadian Dam Association Bulletin - Winter 2018 - 27
Canadian Dam Association Bulletin - Winter 2018 - CDA AWARDS
Canadian Dam Association Bulletin - Winter 2018 - 29
Canadian Dam Association Bulletin - Winter 2018 - ANNUAL GENERAL MEETING 2017
Canadian Dam Association Bulletin - Winter 2018 - 31
Canadian Dam Association Bulletin - Winter 2018 - YOUNG PROFESSIONALS UPDATE
Canadian Dam Association Bulletin - Winter 2018 - 33
Canadian Dam Association Bulletin - Winter 2018 - DAMS AND DIKES, WIKI STYLE
Canadian Dam Association Bulletin - Winter 2018 - 35
Canadian Dam Association Bulletin - Winter 2018 - 2017 FINANCE REPORT
Canadian Dam Association Bulletin - Winter 2018 - 37
Canadian Dam Association Bulletin - Winter 2018 - 38
Canadian Dam Association Bulletin - Winter 2018 - 39
Canadian Dam Association Bulletin - Winter 2018 - CDA 2018 CONFERENCE: THE MANAGEMENT OF AGING DAMS
Canadian Dam Association Bulletin - Winter 2018 - 41
Canadian Dam Association Bulletin - Winter 2018 - CDA NEWS BRIEF
Canadian Dam Association Bulletin - Winter 2018 - 43
Canadian Dam Association Bulletin - Winter 2018 - 44
Canadian Dam Association Bulletin - Winter 2018 - BUYERS’ GUIDE AND TRADE LIST
Canadian Dam Association Bulletin - Winter 2018 - 46
Canadian Dam Association Bulletin - Winter 2018 - cover3
Canadian Dam Association Bulletin - Winter 2018 - cover4
https://www.nxtbook.com/naylor/CDAQ/CDAQ0119
https://www.nxtbook.com/naylor/CDAQ/CDAQ0418
https://www.nxtbook.com/naylor/CDAQ/CDAQ0318
https://www.nxtbook.com/naylor/CDAQ/CDAQ0218
https://www.nxtbook.com/naylor/CDAQ/CDAQ0118
https://www.nxtbook.com/naylor/CDAQ/CDAQ0417
https://www.nxtbook.com/naylor/CDAQ/CDAQ0317
https://www.nxtbook.com/naylor/CDAQ/CDAQ0217
https://www.nxtbook.com/naylor/CDAQ/CDAQ0117
https://www.nxtbook.com/naylor/CDAQ/CDAQ0416
https://www.nxtbook.com/naylor/CDAQ/CDAQ0316
https://www.nxtbook.com/naylor/CDAQ/CDAQ0216
https://www.nxtbook.com/naylor/CDAQ/CDAQ0116
https://www.nxtbook.com/naylor/CDAQ/CDAQ0415
https://www.nxtbook.com/naylor/CDAQ/CDAQ0315
https://www.nxtbook.com/naylor/CDAQ/CDAQ0215
https://www.nxtbook.com/naylor/CDAQ/CDAQ0115
https://www.nxtbookmedia.com