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Last modified
1/26/2010 2:58:07 PM
Creation date
10/12/2006 4:15:05 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8170
Description
Arkansas Basin Water Quality Issues
State
CO
Basin
Arkansas
Water Division
2
Date
1/1/1998
Author
USGS
Title
Water-Quality Assessment of the Arkansas River Basin - Southeastern Colorado - 1990-93
Water Supply Pro - Doc Type
Report/Study
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<br />Iron <br />022~ d' d' I d' . <br />....,-ne me Ian 1550 ve -Iron concentrations were <br />largest during early-snowmelt runoff; the maximum <br />median concentration (330 l'g/L) was at Leadville <br />(fig. 9). Dissolved-iron concentrations were much <br />smaller during the other three streamflow regimes and <br />350 <br /> <br />Z 300 <br />o <br />;:: <br />.. <br />cr <br />~ a: 250 <br />WW <br />oto <br />z~ <br />ocr <br />() ~ 200 <br />z'" <br />0" <br />~;:; <br />c <br />~8 '50 <br />~cr <br />00 <br />iil:;; <br />i3~ tOO <br />z <br />.. <br />C <br />W <br />" so <br /> <br />were not substantially different from one another <br />(fig. 9). Median percentages of dissolved-iron <br />concentrations decreased downstream largely because <br />of the increased partitioning of iron to the particulate <br />phase (fig. 10). The median percentage of iron in the <br />dissolved phase decreased from a maximum of <br /> <br /> <br />- - ~ <br />- -... <br />-~---- <br /> <br /> -- <br />0 <br /> .~0 ~~'\'b- ~~0 ~\;.}~ ,<1< ~0 <br /> ".-li" e/" ~. ~~~ ~~~ <br /> "'0" <br />S.DDD , , <br /> , <br /> <br />z <br />o <br />~ <br />cr <br />~ 4,000 <br />w <br />o <br />i5ffi <br />oto <br />z~ <br />~ffi 3,000 <br />-0- <br />W'" <br />oj" <br />;:;;:; <br />w'-" <br />,.0 <br />8 5 2.000 <br />~3j <br />~~ <br />.. <br />o <br />I- 1.000 <br />~ <br />C <br />w <br />" <br /> <br />-- <br /> <br />- <br /> <br />- <br /> <br />- <br /> <br />--- <br /> <br />..';..a...r...._........ <br /> <br />?>~0 <br />~.I.t' <br /> <br />~"<;p <br />~o <br /> <br />, <br /> <br />, <br /> <br />'" <br />'" <br />" <br />" <br />/ <br />/ <br />/ <br />/ <br />/ <br />/ <br />/ <br /> <br />-. <br /> <br />o <br /> <br />;-: <br />.1f' <br />.,}'-li" <br /> <br />.---- <br />.- <br /> <br />.--.. <br /> <br />'",-,-- -------- <br />...--;--...-...........-:-;.,.: . <br /> <br />r---J <br /> <br />" <br />'" <br />'" <br />'" <br /> <br />-" <br /> <br />," <br /> <br />, <br />~~<? <br /> <br />~~0 <br />0'" <br /> <br />..:j,,4-'b- <br />~. <br />"'0" <br /> <br />.."~ <br />....... <br />- =- <br /> <br />~,<1< <br />"," <br /> <br />,f> <br />~oi!i <br /> <br />~0 <br />.:t\~~ <br /> <br />iI'~" <br />~.. <br /> <br />EXPLANA liON <br /> <br />EARlY.SNOWMELT RUNOFF (April) .. _ _. POST-SNOWMELT RUNOFF (July-September) <br /> <br />SNOWMElT RUNOF"F (May-June) _ . _ LOW FLOW (October-March) <br /> <br />Figure 9. Median dissolved- and total-recoverable iron concentrations by streamflow regime in the upper <br />ArKansas River. April 199o-March 1993. <br /> <br />WATER QUALITY 23 <br />
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