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WATER CHEMISTRY <br />Limited chemical data were collected for this study area. <br />Samples were analyzed for heavy metals and selenium, but since no <br />attempt was made to determine water sources, and since most water <br />originates in the Green River, only a few samples were analyzed <br />for anions and cations. In general study area water is a sodium- <br />calcium sulfate-bicarbonate type water. Chloride occurs in low <br />concentrations compared with sulfate and bicarbonate. <br />Water conductivities were relatively low compared with the <br />other study sites. Figure 11 shows the conductivity of water <br />from our study stations. In general, conductivities in the river <br />and lakes connected to the river was less than 1000 uS cm'1. <br />Managed wetlands had high evaporation rates with no flushing and <br />conductivities ranged around 2,000 uS cm'1. Ground waters, as we <br />found at other study sites, had the highest conductivities, to <br />more than 10,000 Us cm-1. This confirms what we have found <br />previously, ground waters, while connected to the Green River, <br />are not flushed out annually and evapotranspiration can lead to <br />the development of saline pools of water in floodplains. <br />OURAY NATIONAL WILDLIFE REFUGE <br />U 2 <br />Woods Pool 1 ` 015 W <br />(1)Id a,a<ue) 4 3 <br />13 <br />5 0 <br />880 <br />011 13R <br />Sheppmd <br />Boliom <br />Utz w <br />30 <br />® HEADQUARTERS <br />N T <br />Green River O6 <br />Q9 0 5 <br />o1D ow <br />75 ~ Wyaskel <br />Lake Wyaskel <br />Pond <br />MAXIMUM CONDUCTIVITY (uS cm-2 ) <br />FOR SURFACE AND GROUND WATERS <br />I 1 Vila I <br />L1 =2180 <br />L2=10350 <br />L3=8960 <br />L7=2390 <br />L 1-7 <br />~~ w 9 9 <br />I Q3 f3R <br />~ Leola <br />O1 f3oNom <br />24 0 <br />! ow <br />\ Qz 4 0 <br />Figure 11. Conductivities of surface waters in the study area. <br />18 <br />