My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WMOD00264
CWCB
>
Weather Modification
>
Backfile
>
WMOD00264
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
7/28/2009 2:29:00 PM
Creation date
2/7/2007 11:44:46 AM
Metadata
Fields
Template:
Weather Modification
Applicant
USBR
Sponsor Name
CWCB
Project Name
Analysis of Cloud Seeding Potential
Title
Potential Water Augmentationfrom Cloud Seeding in the Colorado River Basin
Prepared For
CWCB
Prepared By
USBR
Date
12/1/2005
State
CO
Weather Modification - Doc Type
Scientific Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
9
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 />L.,... <br />,.....,01 b..... <br />_.... <br />-..'"''' <br />_"0',. <br />-...." <br />..'\:1... <br />_...... <br />.-. <br /> <br /> <br />I <br />I <br />, <br />I <br />- , <br />-- <br /> <br />MountaIn Snowpack <br />as of April 1, 2005 <br />....- <br />-' <br />..,.. <br />......00 <br />."c.,.. <br />_10.,. <br />.",.. <br />_to... <br />... <br /> <br /> <br />, <br />, <br />, <br />-, <br />" <br /> <br />Mountain Snow pack <br />as of April 1 , 2004 <br /> <br />" <br />f ~,' <br />. -II <br />,_ \ 'i <br />--"'\-.t <br /> <br />Figure 2. Snowpack expressed as percent of 3D-year average in various sub.basins of the <br />Colorado River basin, as of 1 April 2004 (left) and 1 April 2005 (right). Data are from SNOTEL <br />sites operated by the National Resource Conservation Service (NRCS) and figures are from the <br />NRCS National Water and Climate Center. <br /> <br />2.3. Use ofSNOTEI.lln..'Cipitation Data to Estimate Snowpack Ablation <br /> <br />To estimate snowpack ablation, we compared November I to April I accumulated <br />gauge snowfall at 16 SNOTEL sites against April I SNODAS SWE there. November I <br />is a nominal datc after which most precipitation falls as snow rather than min. The 16 <br />sites were from Colorado, Utah, Wyoming, and Arizona, at dispersed geogmphic <br />locations and elevations. Interestingly, thc SNOTEL pn.'Cipitation.to-SNODAS SWE <br />ratios were 1.22 in 2004 and 0.89 in 2005, respectively. The latter ratio, indicative of <br />greater snowpack water than precipitation, might reneet a problem with gauge <br />precipitation measurement or the arbitrary November I start date of the snowfall season. <br />There is signilicant gauge under catch of snowfall in wind-exposed locations that might <br />explain much of the problem. The bottom line is that we cannot tmst the SNOTEL <br />gauge-measured seasonal precipitation to estimate seasonal melt of the snowpack. There <br />is one othcr option to estimate melt. The SNODAS model outputs snow melt at the base <br />of the pack. We post daily melt products on our Colorado web site6. To generate <br />seasonal melt, we would have to sum the daily values over an entire winter. "Ibis is <br />beyond the scope of the current study but may be pursued later. <br /> <br />5 <br />
The URL can be used to link to this page
Your browser does not support the video tag.