RECOMMENDED FUTURE STUDIES 



During the present study a number of subject areas were identified that 

 should be investigated. 



1. Evaluation of gravel mining from coastal and upland sources; and, 

 preparation of guidelines for users of these sources. These alternatives to 

 floodplain sources have not been studied. 



2. Evaluation of the effects of multiple sites on one river system. 

 Such an investigation should be aimed at determining the critical, spatial, 

 and temporal relationships of multiple sites. Gravel replenishment rate pre- 

 dictions should be an integral part of this investigation. 



3. Several floodplain gravel removal sites should be investigated 

 before, during, and after mining to assess the adequacy of the Guidelines 

 Manua I . 



4. Several specific topics of the Guidelines Manual should be studied 

 in detail to assess their adequacy, i.e., buffers, pit design, and active 

 channel dredging. 



384 



