FLOOD05706

• County: Statewide
• Community: State of Colorado
• Basin: Statewide
• Title: DAMCAL - Damage Reach Stage-Damage Calculation - Users Manual
• Date: 2/1/1979
• Prepared For: State of Colorado
• Prepared By: Hydrologic Engineering Center
• Floodplain - Doc Type: Educational/Technical/Reference Information

------
Damage Reach Boundary ....--- --__
\........-- Grid ril .....
__------............- Ce1~ f

r-- ---- --------------~-ITJ
~ -:::-_~ G) Index f61 __I-
I DtB Location L2.J I
11 __ I
l "".--"" -.......-..,.)
, 1 _,- -
'-- ----
......-----",,--

NOTE: Only selected grid cells are shown for clarity but
in application the grid cells are exhaustive for the
entire reach

COMPOSITE DAMAGE FUNCTIONS (Land Use Cateqory 1)

OJ
CD
'"
....,
V1

Uniform Protection Level

())
c. I
'"
...., /
V1
I
I

$ Damages
Base Condition

$ Damages
Modified Condition

GENERAL PROCEDURE FOR FLOOD PROOFING OPTION

1. If a uniform protection level is designated for land use category 1,
then the composite damage functions of all grid cells assigned land
use 1 are truncated to the specified protection level as shown. (It
should be noted that the process could be repeated in the flood proof-
ing of other land use categories).

2. An elevation-damage curve is then developed for each grid cell in the
damage reach using the adopted and modified composite damage functions
and assigning topographic elevations to the various stages (in the
case of grid cell 1 the composite damage function would be the modified
or truncated condition).

3. The elevation-damage curves are then adjusted based on the difference
in reference flood elevations between individual grid cells and the index
location and then aggregated according to land use classification.

FIGURE 4-6
FLOOD PROOFING SELECTED LAND USE CATEGORIES

4-18