My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
FLOOD03593
CWCB
>
Floodplain Documents
>
Backfile
>
3001-4000
>
FLOOD03593
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/25/2010 6:27:44 PM
Creation date
10/4/2006 11:53:39 PM
Metadata
Fields
Template:
Floodplain Documents
County
Garfield
Community
Glenwood Springs
Basin
Statewide
Title
Debris-flow Hazard Analysis and Mitigation An Example from Glenwood Springs
Date
1/1/1977
Prepared For
State of Colorado
Prepared By
USGS
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.
/
53
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 />CHAPTER II. DEBRIS-FLOW DRAINAGE BASINS <br /> <br />A. Location of Basins <br /> <br />The three debris-flow drainage basins studied aTe indicated on Figure <br /> <br />I and are named Gulch A, Guloh B, and Gulch C. These three basins differ <br /> <br />from one another in size, area, Ilnd volume of availablE! debris on steE!p <br /> <br />slopes; however, their general characteristics in terms of potential for <br /> <br />producing thE! flows arE! similar and are discussed below. <br /> <br />B. General Characteristics of Debris-Ylow Drainage Basins <br /> <br />Solid material is transported downstrE!am in all drainage basins by <br /> <br />running water and other mass-wasting processes. However, progressively <br /> <br />smaller and steeper basins often tend to transport solid material by a <br /> <br />particular combination of floodi.ng and mass-wasting proceSfles. Thi s comb ina t ion) <br /> <br />as described earlier, is called a debds flow "nd is often the most important <br /> <br />erosion process in small drai,nage basins. Debris flows are the dominant <br /> <br />process in the small basins studied here. <br /> <br />In order for debris flows to <br /> <br />occur, certain conditions must be met that include (1) sufl'icient available <br /> <br />unconsolidated debris, including soil, rock, and organic material, (2) <br /> <br />steep slopes, (3) a sufficiently high clay content in the debris, and (4) <br /> <br />a large volume of debris compared with the available water. All of these <br /> <br />necessary conditions exist ill the basins studied here and are discussed <br /> <br />- 6 - <br />
The URL can be used to link to this page
Your browser does not support the video tag.