My WebLink
|
Help
|
About
|
Sign Out
Home
Browse
Search
WSP02044
CWCB
>
Water Supply Protection
>
Backfile
>
2001-3000
>
WSP02044
Metadata
Thumbnails
Annotations
Entry Properties
Last modified
1/26/2010 12:34:06 PM
Creation date
10/11/2006 10:53:10 PM
Metadata
Fields
Template:
Water Supply Protection
File Number
8126.700
Description
Arkansas River Coordinating Committee - Committees - Subcommittees
State
CO
Basin
Arkansas
Water Division
2
Date
11/1/1973
Author
Water Resources Asso
Title
Salvage of Water due to Phreatophyte Clearing Shelton Farms Arkansas River Valley Colorado
Water Supply Pro - Doc Type
Report/Study
There are no annotations on this page.
Document management portal powered by Laserfiche WebLink 9 © 1998-2015
Laserfiche.
All rights reserved.
/
29
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 />is detennined by the cropping pattern. However, the .llJl1U1al consumptive use <br />fluctuates more because of differences in annual precipitation than because <br />of differences in cropping patterns. For example, assume different cropping <br />patterns as follows: <br />Alfalfa <br /> <br />33% <br />33% <br />33% <br /> <br />25% <br /> <br />60% <br />20% <br />20% <br /> <br />Grass, hay, etc. <br />Corn, small grains <br />Average Irrigation <br />Consumptive Use (ft.) 1.5 1.3 1.6 <br />Thus, the probable range of difference is about 0,3 of a foot, due to <br />c!opping pattern; whereas, effective precipitation might vary 0.5 foot or <br />more. <br /> <br />75% <br /> <br />Depth To Water In Areas A, B, and C <br /> <br />As shown above, use of water by phreatophytes varies with depth of the <br />water table. It is necessary, therefore, to investigate in each instance the <br />factors influencing the groundwater depth in each particular area under con- <br />sideration. <br />Area A lies along the Arkansas River channel in the northwest portion of <br />the Shelton Fam, j1.iSt west of the old Fort Lyon Canal diversion works. (See <br />Plate I and aerial photos). <br />Records of spring and fall water levels (3) and (4) show that the depth <br />to water, immediately east and west of Area A, varies annually fran 9 to <br />12 feet. The reports do not indicate when the observations were made, but <br />they can be presUlOOd to be static levels uninfluenced by major pumping. <br />This area is extremely flat without any significant topographic features. <br />No detailed topography is available. However, a minor adjustment in elevation <br />may be necessary to estimate the depth to water under Area A. <br />A second influence on the depth of the water is the fluctuation of the <br />groundwater level due to the.phreatophytes' own use of water. This phenomenom <br />has been observed in several places in the southwest. Plate II, which is <br />reproduced fran a report by the U.S,G.S. on the Pecos River, New Mexico (11), <br />shows how seasonal fluctuations of groundwater levels vary in phreatophyte <br />areas where there are no other influencing factors. The fluctuation is not <br />great, but it contributes to lower water level conditions at the time use <br />rates are highest, Figure 2 shows the variation in water use of phreatophytes <br />on a monthly basis. The effect of this, compared to Plate II and the rates <br /> <br />-8- <br />
The URL can be used to link to this page
Your browser does not support the video tag.