Laserfiche WebLink
<br />CONTENTS <br /> <br />Glossary of scientific names for biological organisms ......................................................................................................... viii <br /> <br />Abstract ......,......................................................................................................................................................................... I <br />Introduction .......................................................................................................................................................................... 2 <br />Purpose and scope ...................................................................................................................................................... 4 <br />AclalOwledgments ...................................................................................................................................................... 4 <br />Description of Dolores Project area ..................................................................................................................................... 4 <br />Location.....................................................................................................................................................................4 <br />History ........................................................................................................................................................................ 7 <br />Physiography and climate .......................................................................................................................................... 7 <br />Geology ...................................................................................................................................................................... 8 <br />Soils and land use ....................................................................................................................................................... 8 <br />Soils .................................................................................................................................................................. 8 <br />Land use ........................................................................................................................................................... 9 <br />Fish and wildlife resources' ........................................................................................................................................ 9 <br />Hydrologic setting ................................................................................................................................................................ 10 <br />Surface water.............................................................................................................................................................. 11 <br />Irrigation projects ....................................................................................................................................................... 13 <br />Dolores Project ..................................................................................................:.............................................. 13 <br />Ute Mountain Ute Irrigation Project ................................................................................................................ 15 <br />Mancos Project ................................................................................................................................................. 15 <br />Summit Irrigation Disttict ................................................................................................................................ 16 <br />Ground water .............................................................................................................................................................. 16 <br />Previous investigations ........................................................................................................................................................ 16 <br />Water-quality data ...................................................................................................................................................... 17 <br />Surface water ........................................................................;........................................................................... 17 <br />Ground water .................................................................................................................................................... 19 <br />Soil and bottom.sediment data ................................................................................................................................... 19 <br />Biological data ........................................................................................................................................................... 20 <br />Mancos River field-screening study ................................................................................................................. 20 <br />Selenium concentrations in aquatic biota ............................................................................................... 23 <br />Selenium concentrations in birds ........................................................................................................... 26 <br />Sample collection and analysis ............................................................................................................................................ 26 <br />Objectives ................................................................................................................................................................... 26 <br />Sampling sites and schedule of sample collection ..................................................................................................... 28 <br /> <br />Sampling methods ...................................................................................................................................................... 30 <br />Analytical support ...................................................................................................................................................... 31 <br />Discussion of results ............................................................................................................................................................ 31 <br />Water quality .............................................................................................................................................................. 31 <br />Guidelines for interpretation of water-quality data .......................................................................................... 32 <br /> <br />Dissolved solids and major constituents .......................................................................................................... 34 <br />Trace elements ................................................................................................................................................. 36 <br />Cadmium ................................................................................................................................................ 36 <br />Mercury .................................................................................................................................................. 37 <br />Selenium ................................................................................................................................................. 37 <br />Other trace elements ............................................................................................................................... 39 <br />Pesticides ............................................. ............................................................................................................. 40 <br />Bottom sediment ......................................................................................................................................................... 40 <br />Biota ........................................................................................................................................................................... 42 <br />Data interpretation ............................................................................................................................................ 42 <br />n-ace elements ............................................................ ...................... ........ ........................................... ............ 43 <br />Selenium in aquatic plants ..................................................................................................................... 43 <br />Selenium in aquatic invertebrates .......................................................................................................... 45 <br /> <br />CONTENTS /II <br />