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<br />Elevations and dI8iancc., aloilii Arkan8a8 River troill C1I1I(}I1 CUll to Colo,.,,,lo-
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<br /> above From
<br /> ~leve1. Canon Point to Total. Per mile.
<br /> Clly, point.
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<br />.. "Ftd. .Jlilu. .Jlilu. Fed. Fut.
<br />Canon City. .............. ..... .'0 ...... .... ....... ..~ 5,320 .....TO" .....To. .......ii. ........25
<br />011 Creek... .... .....m...... .;............ m...... 5,245
<br />Elghtmlle Creek.. ..,..................... ...... ..... 5,125 V.8 6.8 120 18
<br />Hardscrabble Creek.. .................... .....;..... 5,020 14.5 4.7 105 22
<br />~v~~fi:".~:::::::~::::::::::::.:::::::::::::::::::: 4,970 18.0 '. 3.5 SO 14
<br />4,900 23.2 . 5.2 10 13
<br />Pecks Creek ~ . ~. ~. ~ ~ ~ ~ ~. ~. ~....... ~. ~. ~ ~ ~ ~... ~ ~ ~.. ~ ~ ~ f,715 32.0 8.8 125 a
<br />Union Avenue'Brldge, Pueblo....................... 4,670 43.0 11.0 105 10
<br />St. Charles River ~ ~.....~~.~ '~.~."""" .~~....~. ..~ 4,560 SI.8 8.8 110 12
<br />Huerrano RI'\"er. ~ ~ ...~..~.~". '~'~"'~'~.. -~..~. ~~~. 4,.l30 &7.1 15.3 130 8
<br />Aplshapa Rlv.r.. ...............m................. . 4,200 89.8 22.7 ISO 7
<br />Bridge north 01 ROCky Ford.....:.... ~.............. ",lro 10-1.8 15.0 130 9
<br />La Junta... ..~~~~ ,~~.'~"'."" ..~... ~~..;....-. ..~.. , .4,0:.0 lt7.6 12.8 100 8
<br />Adobe Creek.. ..............................:....... 3,9;)1) 133.1 15.5 120 8
<br />~~~~~~i~~~::::::::::::: :::::: ~::::: :::::: :::~: 3,850 142.5 9.4 80 9
<br />. 3,760 156.3 13.8 90 7
<br />Lamar.~~ _ ~. ~... ~_... ~.. ~ .'~ ~ ~ ~""'.'" ~ ~. ~ ~... ~... ~ ~ 3,600 176.3 20.0 160 8
<br />B~ Sandy Creek. ...,........................... ,.;.. . 3 850 185. 0 . 8.7 SO G
<br />B dge north 01 Granada.............m............. 3:48> 1V-1.8 9.8 10 7
<br />Colorado-Kansas line...... ...................... ..... 3,350 211.4 16.6 130 8
<br />
<br />CAUSE OF FLOOD.'
<br />
<br />The cause of the flood was ~ series ofcloud-bnrs~. resulting from
<br />he~vy rain-bea~ing clouds striking against the mountains and being
<br />deflected upward.
<br />The daily weather maps for the first week in June show that an
<br />area o~ high pressure (e~ceedin~ .30.5 : inches) appeared over the
<br />
<br />. The. phenomena. called' If eloud-bursts' n a.re' verl intense nuntalls of short duration
<br />.Oler small nreas that are sbarply dedned... Cloud-bursts are cOmmon a.long the ea.Stern., .
<br />slope of the Roc.ty Mountains .wh,erever canyons bave cut deeply into the moun~
<br />masses.' Each of these canyons acts like 8,' "chimney .flue in creating a strong upward
<br />draft for the warm and relatlvel,. moIst. air, from the plains, whIch passes up the CBnybn .
<br />and reaches an altltude where the temperature becomel low enough to condenledt~e'.'
<br />mol.tnre. . The upward dniIt II su1llciently Itrong 'to aupport the 'molsture for .ome'
<br />time after condensation .begins, but . finally the weight of moisture in the aIr becomes'"
<br />too great to be.1onger .u.t~ined and It is preclpItnted In torrents~
<br />Cloud.bursts of leaa violence also- occur on the plains. The air over a Imall area be-
<br />comes abnormally heated, and the convectional currents force the alr upward. .
<br />Coincldent with: a cloud.burst Is the other phenomenon of a II wall .of water" rushing
<br />down the atream. Where the loll 18 clayey and has been baked. hard by the. sun, the
<br />conditions ure ideal for'rapId run-ot[ after a heavy' raIn.' The following explanation of
<br />the It wall at water" Is taken trom Englnt"erlng and Conuact1ng tor June 8, 1021: '~".
<br />.. When rain begins to tall more rapidly than the 101\ enn ablorb It, the first thhi
<br />sheet of water that flowlI down the watercourses moves slowly, becam~e the. friction .of
<br />the water Is proportionately greatcr the shallower. the Itream. The friction act.. lIke,a
<br />dam, holding the stream back. H('nce it tollows that the water tenus to bank up, :'\0 tbnt
<br />the ra.In that tell tlrst Is oVt'rtaken by rain that tell many mlnute~ Inter, The de-t.pp.r
<br />.the, ~~"am the faster It OOWI, tor the. frictional resistance Is then proportionately .less.
<br />COD8~uentl)' the time come~ when the flood move-s rapidly down the WI\tet'~Ollrsp. its
<br />'lronf i, 'C~e~t orten being severnl teet dE:'ep' :lnd lookln~ like n h\lg~ fteB. wtwe :thout' to
<br />brl'sk' on II. shore,"
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