9504 - Laserfiche WebLink

Home Browse Search

-Water samples were collected directly from the streams, springs, and .ponds and was pumped from ground water wells. When pumping from wells, we pumped the wells until the several well :volumes had been removed and the water ran clean. Water pH, temperature and conductance of all water was determined immediately in the field with a hand held ICM model 51601 water analyzer. All water was immediately passed through a 0.45 micron filter and the sample was then split,- with 1/2 being acidified with nitric .acid, and the remaining left untreated. Samples were kept cold until analyzed. .All chemical analyses were performed by the U.S. Bureau. of Reclamation Denver Office Chemistry Laboratory under the supervision of Douglas Craft. Splits were made by the BOR lab and samples sent to Barringer Laboratories, Golden, CO for analysis of selenium. Acidified samples were analyzed for the following metals; V, Si, Zn, Sb, Ag, A1, As, B, Ba, Be, Cd, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb, Se,-and Se.- Unacidified samples were analyzed for: pH and TDS; cations Ca, Mg, Na, and K; anions. HCO3, CO3, SO4 and Cl'; and alkalinity as CaCO3. Values from Mr. Crafts final report are attached as Appendix. Vegetation The. vegetation at any site-is an excellent indicator of -long-term ecological conditions. Plants have relatively narrow ecologic al .amplitudes -for depth of flooding, frequency of flooding, duration of anaerobic conditions in the soil,-.water and soil salinity, and in certain cases nutrient .availability. They therefore provide good long-term ,indicators. of environmental ~~ patterns. .Vegetation patterns on a landscape can-also provide.- - insights into former flooding patterns, water depths and durations, salinity and other characteristics. Thus, vegetation patterns provides an important tool .for interpreting past-and present hydrologic and chemical patterns in the landscape. Quantitative data on.plant community .composition, cover-and biomass is not used to describe the vegetation in detail. Instead-the vegetation was used only to stratify the site for the purpose of hydrology,. water chemistry and other biological investigations. Invertebrates The quantification of invertebrate populations in-Moab wetlands was one of the-most important study goals. The study area contains 5 major wetland types. They are: 1) hardstem bulrush marshes; 2) submerged aquatic marshes; 3) black willow swamps; 4) river backwaters; 5) the-river itself:. .The Colorado River samples are used as a control to compare with every other community. 5