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PREFACE <br />The present study was undertaken to provide baseline <br />information on the hydrology, water chemistry and ecological <br />characteristics of-the Moab study area. It should be remembered.- <br />that four investigations of this scope were being-conducted <br />simultaneously. Thus, the depth of our work is more limited in a <br />-few instances then we would have liked. <br />Our data includes a full investigation of the surface and <br />ground water hydrology of the study site. This data is adequate <br />to understand the overall hydrologic patterns on the. site. Water <br />samples were collected for chemical-analysis. In many instances <br />samples were collected only once for. each station. -Thus, we have <br />no replication and can only say that-the data represent the <br />conditions-at the time of sampling.- However, the issues raised- <br />in this report are hardly transitory and,the data are a valid <br />representation of the site. <br />Site-vegetation was studied only to help stratify the site <br />'for hydrology,. chemistry and invertebrate investigations. The <br />vegetation is described in only general terms and standing crop:. <br />measurements were not taken.:- This was done so that more time- <br />- could be spent on the water and invertebrate portions of the <br />-study which we deemed-more critical to the fish. recovery program. <br />The water column and benthic, invertebrate investigation at <br />.the Moab site .includes 287 samples,- with replicates within- <br />- vegetation-type. Replicate samples within-each stand was-done <br />for water column invertebrates,-but we did not have replicates of <br />the benthic. community-because we felt that there-would be <br />insufficient time to analyze all the data. The data presented <br />-.are very interesting however, and., it would have been more useful. <br />if we had-replicates of each sample site for each date. <br />It .should also be recognized-that. the purpose of this report <br />is to present the data. Synthesis and integration-af the data <br />from all sites-will be presented in a separate-paper ,to be issued <br />later in 1994. <br />1 <br />