My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
FLOOD07755
CWCB
>
Floodplain Documents
>
Backfile
>
7001-8000
>
FLOOD07755
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/25/2010 7:12:42 PM
Creation date
10/5/2006 3:11:14 AM
Metadata
Fields
Template:
Floodplain Documents
County
Statewide
Basin
Statewide
Title
Engineering and Design Runoff from Snowmelt
Date
1/5/1960
Prepared By
US Army Corps of Engineers
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.
/
70
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 />EM 1110-2-1406 <br />5 Jan 60 <br /> <br />the determination ,}f .ehe water equivalent of the snowpack, for use in forecasting total volume of <br />runoff during the melt season, 1fethods <if formulating seasonal runoff forecasts, however, aTe <br />not within the scope of this manual. <br /> <br />1~05. PROBLEM OF SNOW HYDROLOGY. A knowledge of certain hasic physical relation- <br />ships is required for tbe intelligent application of snoW hydrology, Since the atmosphere constitutes <br />the immediate source of the earth's moisture supply and nlso regulates the energy exchange within <br />a. iHlsin which in tun g;OVCfIlS snow.melt rat.('sl the scicBce of meteorology is particularly important. <br />Physical principles underlying energy exehan:.':" to the sno\\-pa"k, both from the atmosphere and <br />from the sun, as well as effects of tl", atmosphere on radiation exchange, must be generally understood, <br />In the application of SI1-CW hydrology to the computation of ba,in snowmelt, it is usually <br />necessary first to consider each melt component at a point, under stated conditions of environment. <br />In this regard, the r"lationships may be expressed by mathematical formulas, with constants of <br />proportionality given in the form of coefficients_ Having determined point values from laboratory <br />experiments, the next ~tep consists of utilizing these vulu(ls to determine amounts and distribution <br />over a basin area, considcring variations in environment, as \vcll as in time. This involves pro- <br />cedures which are much less exact Hnd less rigorous dum is the case ,vit,!J point evaluations. It is <br />necessary to deal with basin avcragf'S in major subdivisions of topography and also to deal wiLh <br />averages in time. These requirements lead to the use of indexes to represent basin averages from <br />individual point measurements. Indexes may range in use from simple two-variable relationships <br />to complex multivari"ble st"tistieal "nalysis, <br /> <br />2 <br /> <br />e <br /> <br />e <br /> <br />e <br />
The URL can be used to link to this page
Your browser does not support the video tag.