|
<br />I
<br />
<br />I.
<br />I
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />Ie
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />
<br />I
<br />I
<br />
<br />I
<br />
<br />..
<br />I
<br />
<br />I
<br />
<br /><:"'~""-----_.""~"'
<br />
<br />PRESENTATION OF RESULTS
<br />
<br />Before presenting depth-damage curves that can be used in the Denver
<br />
<br />area, it would be informative to present the damages obtained using some of
<br />
<br />the various existing commercial depth-damage tables and curves for comparative
<br />
<br />purposes. On Table 4 damages obtained using five different curves or tables
<br />
<br />for various types of businesses (not structure types) are presented. For the
<br />
<br />ease of making a comparison, each structure was assumed to have a value of
<br />
<br />$100,000, excluding lot or content value. Content value was assumed at 60%
<br />
<br />of structure value. This value originated from the analysis of 1,931 non-
<br />
<br />residential structure flood claims and 1,780 non-residential content flood
<br />
<br />claims which yielded a content value to structure value ratio of .56. A
<br />
<br />1960 study (Homan, et aI, 1960) yielded a content value to structure value
<br />
<br />ratio of 1.28 for commercial and industrial establishments in California.
<br />
<br />A minimal number of additional assumptions had to be made in order to make
<br />
<br />the comparison. Altering the content to structure ratio would change all
<br />
<br />the damage values except those for the U.S.A.C.E., Omaha. It was assumed
<br />
<br />that the structures had no basements and the comparison is for 2 feet of
<br />
<br />water over the first floor.
<br />
<br />The range in the flood damage estimates for commercial structures
<br />
<br />and contents is extremely large as can be seen on Table 4. The range is
<br />
<br />much larger than it is for residential structures. Damage to the same
<br />
<br />hypothetical drug store ranged from $7,680 to $231,660, using the different
<br />
<br />estimating techniques. With such large differences, it is apparent that
<br />
<br />additional work in this field is necessary. If the basic data upon which
<br />
<br />flood control projects are designed and authorized is filled with flaws,
<br />
<br />cannot some projects be drastically oversized whereas, other worthwhile
<br />
<br />82
<br />
<br />,.~ --"..,,,,._~~~", .,~_.~~,,,,..,..,,._~".__, ~._-~ ._..,_......._,_ _~-.,--f_'^-..,-_.w/-.. -~_..
<br />
<br />~.- ......,'~,....,.,...,"t'.._.
<br />
<br />""",..,.-'~-~-~~,.."<""~-"~:,..~,,'"!"'f.,..,,..,- ~
<br />
<br />'''','~-,....,.:'''''~.,
<br />
|