WSP12088

• File Number: 8170
• Description: Arkansas Basin Water Quality Issues
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1996
• Author: USGS
• Title: Water-Quality Assessment of the Arkansas River Basin - Southeastern Colorado - 1990-93
• Water Supply Pro - Doc Type: Report/Study

1764

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Nick.I.........._.....................__............_._........................._.......................____.............................. 49

S.lenium........._...................._.............................................._..........................._................................ 50

Silv.r .............._..........................................................................................._...................................... 51

linc ............._._..........................._.............................................................................~........................ 52

Nitrog.n and phosphorus ..._......................................................................................................_.............................. 52

Radioch.mical constitu.nlS........................................;............................................................................................... 57

Pesticid.s ....................................................................:............................................................................................... 61

Suspended sediment .................................................................................................................................................. 63

Bact.ria ................................_.................................................................................................................................... 65

Summary .............................................................................................~.............................................._................................ 66

S.I.ct.d references........................._.................................................................................................................................... 73

- .-- -------~_.-.....-.

PLATE

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1. Plate showing location of selected surfac.-water stations in the Arkansas River Basin,.Colorado where

~;:;'.:":'.. ,
_" F1\.-. .......l ....
-'..... W{.--"'-
,~:~t,:>~?~:t~j~;~ '~~~n~ .'
_ _ "~'-;:'\;~:~~I;:' ~~u "'-:~.,\~' _ '" C.~'
FIGURES .."},)."~,, . d ~O '1'-y r>~t~i"- ."
.~ 5~b\e \I'"<"\~ OR \'10 . e.-";;;';'
QUv'" 'c t)\r--'
1. Map showing location of srody area._.............................................................~~.\>\.Q1........';':)~\So.\...:t r~€;'J
. .' "':,d',n9 t>-? . ...00\-:.0\ '::l'J
2. Mean daily streamflow hydrographs for sel.ct.d SiteS on the Arkansas River,:.Aii~ '\3~~~GS~<r.l~........-

3. Exampl. diagram of a boxplot ..............._......................................................................_....................................

water-quality data were collected between April 1990 and March 1993.

4. Variations in pH in the Arkansas River, April I 990-March 1993 .........................................................................

5. Variations in dissolv.d solids conc.naations and comparison of median concentI:ltions of

six major ions in the Arlcansas River. Aprill990-March 1993......................................._._._..............................

6. Median seasonal dissolved and total-recoverable cadmium conc.ntrations in the upp.r

Arkansas Riv.r, April 1990-March 1993 ._......................................._............................_..............................

7. M.dian p.rcentage of dissolv.d cadmium in the upper Arkansas River, April 1990-March 1993 .....-...............

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IV coNTENTS