flood plain information south creek, north creek, catfish - Sarasota ...

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Velocities of flow - Water velocities during floodsdepend largely on the size and shape of the cross sections,conditions of the stream and the bed slope, al I of which varyon different streams and at different locations on the samestream. During an Intermediate Regional Flood, velocities ofmain channel flow in the upper reaches of the streams in thestudy area would be 3 to 4 feet per second. In the lowerreaches, the velocities would be somewhat higher averaging 2to 12 feet per second. It is expected that velocity of flowduring a Standard Project Flood would be sl ightly higher thanduring an Intermediate Regional Flood. Overbank flow in thestudy area would be less than 5 feet per second and averageabout foot per second. Water flowing at 2 feet per secondor less would deposit debris and si It.Rates of rise and duration of flooding - Intenserainfal Is that accompany hurricanes and other severe stormfronts usually produce the floods occurring in Sarasota County.Thus, with each hurricane that effects the study area, two typesof flooding occur, rainfall and tidal. Rainfal I type floodsgenerally rise slowly and stay out of banks for long periodsof time; whereas tidal type floods generally rise quickly andrecede quickly. For the Intermediate Regional and StandardProject Floods at South Creek, table 6 gives the maximum rateof rise, height of rise (from critical stage level to maximum,floodflow levell, time of rise (time period corresponding toheight of rise), and duration of critical stage (period of timeflooding is above critical stage level l.25.....•....-_._--------------------------
TABLE 6RATES OF RISE AND DURATION(South Creek at U.S. 41Bridge)MaximumHeightTimeDurationFloodRate ofRiseofRiseofRi seofCritical Stageft/hrtthrshrsIntermediate RegionalFlood0.22.628103Standa-d Project Flood0.23.830120PHOTOGRAPHS, FUTURE FLOOD HEIGHTSThe levels that the Intermediate Regional and StandardProject Floods are expected to reach at various locations in thestudy area are indicated on the tol lowing photographs.26---------------------------
Page 1: 1FLOOD PLAIN INFORMATIONSOUTH CREEK
Page 5 and 6: CONTENTSPREFACE--------------------
Page 7 and 8: ICONTENTS(Continued)FiGURESFl gureP
Page 9 and 10: PREFACEThe polLtion 06 SaJta..6o:m
Page 11 and 12: North Creek, Catfish Creek, Clower
Page 13 and 14: FLOODSITUATIONSOURCES OF DATA AND R
Page 15 and 16: away and carried downstream to coll
Page 17 and 18: Figure 1U. S. Highway 41 Bridge Ove
Page 19 and 20: Figure 5 U. S. Highway 41 Box Culve
Page 21 and 22: FLOOD DESCRIPTIONSThe fol lowing ar
Page 23 and 24: "The worst flooding in 1962 occurre
Page 25 and 26: .•:::=;...Figure 7 Flood of 1972_
Page 27 and 28: STA.NDARDPROJ en FLOODThe Standard
Page 29 and 30: Table 3 shows a flood elevation com
Page 31 and 32: area tJOUneJdl il" 'I~I(' ,jr('dS t
Page 33: TABLE 5ELEVATION DATA OF STRUCTURES
Page 37 and 38: Figure 9 U. S. Highway 41 Bridge Uv
Page 39 and 40: GLOSSARYBackwater. The resulting hi
Page 41 and 42: GLOSSARYBackwater. The resulting hi
Page 43 and 44: Left Bank. The bank on the left sid
Page 45 and 46: "•c • ••~- .I - -.'.~. .""I
Page 47 and 48: ..'e0:I.;J tli'}1--------------~---
Page 49 and 50: 25...JVI::::Ii.2015~ 10lL.IZ50-l-e:
Page 51 and 52: •t-=ILIZoI~>UJ...JUJCROSS SECTI

flood plain information south creek, north creek, catfish - Sarasota ...

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