CONCLUSIONS 



This simple model may be expected to give results limited in applicability 



by the validity of the assumptions used. In a small area the variation of the 



Coriolis parameter is insignificant as is assumed. Also, for shallow seas the 



lateral friction will probably become negligible in comparsion with vertical 



friction (Welander, 1957). The assumption of a constant coefficient of vertical 



friction. A, is not actually realistic. A constant frictional coefficient 



simplifies the mathematical treatment and may be considered to represent the 



"effective friction". Since equation (6) indicates that the solution increases 



with depth continously, the model must be limited to a range of depth over which 



the approach is valid. This depth limitation is connected with the validity of 



the assumptions that ££. = constant and that the water column density may repre- 

 dn 



sented by p. Consequently the model is generally applied to depths between 10 - 

 100 meters. 



This steady state formulation is possibly applicable to time periods 

 of less than seasonal length. Thus, the approach has the possibility of being 

 extended to model currents in the New York Bight that are in equilibrium with 

 the mean local wind and density fields such that the steady linear equations 

 of motion are valid. 



The proposed model may be considered an initial imporvement on the present 

 state of the art for near-shore SAR planning. It augments existing velocity 

 data and has the advantage of allowing increased detailed representation of 

 the velocity field which cannot be done with present atlas presentations. 



15 



