The information is in a form to allow any professional to evaluate where 

 the data was collected, what data was collected, and the general conclusions 

 of the original investigator. 



This data base is on file with the U. S. Fish and Wildlife Service. 

 It will not be distributed routinely with the Technical Report and Guide- 

 lines Manual. Due to the mass of information available, a specific need 



will have to be identified before the data relevant to that need can be 



provi ded. 



TECHNICAL REPORT 



Analyses of field data, beyond the immediate data reduction after 

 site visits, began in winter 1977-78. This initial effort prepared descrip- 

 tions of each of the study sites visited in previous summers and analyzed 

 data specific to each site. Brief summaries of essential information rele- 

 vant to each of the 25 material sites studied during this project are in- 

 cluded in the subsequent chapter. These are included to orient the reader 

 for the discussions that follow in the individual discipline chapters. 



Data syntheses for all sites did not begin until after the 1978 field 

 season. Analyses of combined site data are contained totally in this report. 

 Each of the six disciplines included in the project, (River Hydrology and 

 Hydraulics, Aquatic Biology, Terrestrial Ecology, Water Quality, Aesthetics, 

 and Geotechnical Engineering), is discussed in separate chapters. These 

 chapters include some integration with other disciplines. For example, 

 Aquatic Biology is dependent, for some of its data interpretation, on the 

 Water Quality parameters measured, and on the physical changes that are 

 described in the River Hydrology and Hydraulics section. 



An interdisciplinary overview of the effects of gravel removal follows 

 the discipline chapters. This chapter reviews the analyses of the six disci- 

 plines in terms of the similarities and differences that are evident. An 

 important aspect of this chapter is discussion of the tradeoffs and com- 

 parisons between disciplines that must occur with respect to the siting. 



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