My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
FLOOD08495
CWCB
>
Floodplain Documents
>
Backfile
>
8001-9000
>
FLOOD08495
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/25/2010 7:14:44 PM
Creation date
10/5/2006 3:41:21 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Community
Statewide
Basin
Statewide
Title
Methodology for Evaluation of Feasibility: Multijurisdictional Urban Drainage and Flood Control Projects
Date
2/1/1977
Prepared By
UDFCD
Floodplain - Doc Type
Educational/Technical/Reference Information
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
66
PDF
Print
Pages to print
Enter page numbers and/or page ranges separated by commas. For example, 1,3,5-12.
After downloading, print the document using a PDF reader (e.g. Adobe Reader).
Show annotations
View images
View plain text
<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />21 <br />have been identified, and those where substantial floodplain occu- <br />pation has occurred. This grouping is shown on Table 11-4. From this <br />exercise we see that the number of Decision Units requiring more <br />careful study is reduced to 12. Where a dam site is possible, the <br />basic decision is "dam or no dam." Then there remain only six <br />reaches with substantial flood hazard for careful study. Each of <br />these is affected by the decision to place a dam upstream. <br />The basic classes of alternatives to consider are selected <br />according to Table 11-5, With the Decision Units shown there are <br />still too many combinations for analysis. Table 11-6 shows the dams <br />which influence various Decision Units. Using this information, a <br />few combinations of dams can be tested to show the range of possi- <br />bilities without testing each alternative exhaustively. <br />To test this, three basic dam combinations are selected: <br />Six Dams = All Dams <br />Two Dams = Holly and Englewood Dams Only <br />No Dams <br />This reduces the number of alternatives further since not all dams <br />affect all Decision Units. The information on Table 11-6 now can <br />be converted as shown in Table 11-7 giving the dam alternatives <br />which must be considered for the Decision Units. These result in <br />16 different flow regimes caused by the presence or absence of flow <br />regulation by the dams. These result from upstream decisions <br />regarding the dams. <br />The type of treatment afforded the downstream reaches is sub- <br />stantially independent of the decisions about dams. Decisions <br />regarding treatment type can be made on the merits of the individual <br />
The URL can be used to link to this page
Your browser does not support the video tag.