9506

• UCREFRP Catalog Number: 9506
• Author: Cooper, D. J. and C. Severn.
• Title: Wetlands of the Escalante Ranch Area, Utah
• USFW Year: 1994.
• USFW - Doc Type: Hydrology, Water Chemistry, Vegetation, Invertebrate Communities, and Restoration Potential.
• Copyright Material: NO

2.6095
2.60
2.608
2.sos
2.6075
2.so7
2.6065
2.606
2.6055
2.605
2.6045
7
Selenium csncentrations, ug/L for Escalante Ranch
9
Utah Water Quality Standard, S.Oug/L ~ = SPrtn9s
nd = bebw detection limit
5
--~ = Se slow
• direction
~.- N 3
Terrace
1, 000 (eei ~ "d
•
Terrace 97
nd ~ ~ s
Escarpment Wetland ~
nd None Detected
1260 nd
Very High
nd
nd
Dike ike ^d Hlg
~ 4
Green River ~-~--
60.5 761.5 762.5 763.5 764.5 765.5 766.5
ion /oz 763 764 765 766 767
(Thousands)
Figure 16. Selenium concentrations in water samples collected in
the study area during 1993.
Selenium concentrations at stations 7 and 15 are very high.
Although these are the only two stations sampled in the northern
area we hypothesize that there may be a plume of saline water
that flows from east to west across the northern portion of the
study area. This plume may be moving appreciable selenium salts.
In addition, another source of selenium occurs on the southern
portion of the study area, and is recorded at stations 12 and a
small pond south of the study area. However, as seen on Figure
16, high selenium concentrations are not widespread, and no water
sample from the wetland contained detectable selenium
concentrations. These patterns may result from differences in
water sources affecting the north, central and southern portion
of the study area, or it could be due to differences in
agricultural practices in these three areas of the terrace east
of the wetland. Soils were not analyzed for selenium
27