VI-144 



Ground Water 



Not to be overlooked in any Investigation of the hydraulics of 

 an estuary is an understanding of the ground water to surface 

 water relationships, including sub-surface water discharges and 

 salt intrusion. This calls for knowledge and quantitation of 

 the chemical and physical characteristics of ground water and 

 ground waterflow in the estuaries. 



Ennineprinn Controls on M?tPr 'Vvempnt 



A natural sequence of an understanding of the hydraulics of an 

 estuary would be the utilization of this knowledge in enginee- 

 ring controls on water movement. Apparently, little work has 

 been done to take advantage of the energy contained In the 

 moving water for the puroose of flushing and bottom-cleansing 

 action. The research question would be: "Is 1t possible to 

 design engineering works that utilize water movements, includinn, 

 tidal action for estuarial flushing and bottom-cleansing?" 

 This question warrants investigation. 



SEDIMENTATION 



Substantial pollution problems in estuaries result from the 

 effects of benthic deposits. These in most estuaries represent 

 a heritage of pollutional materials brought in over the years 

 by streams, outfalls, and sewer overflows discharging into the 



