BEACH 



Figure 4. 



Location of flow sensor tor overwash 

 hydraulics measurements. 



At Nauset Spit-Eastham, an attempt was made to quantify the hydraulic 

 characteristics of overwash surges during storm conditions. A Rarsh-McBirney 

 electromagnetic current meter measured surge velocities. A current mater 

 probe was placed in the throat of the washover landward of the barrier thresh- 

 old (Fig. 4). An aluminum frame held the probe so that it intercepted an 

 undisturbed flow (Fig. 5). A Weathermeasure strip-chart recorder, located 

 within the protective cover of a truck, recorded the hydraulics of the event. 

 Table 1 lists the storms that produced overwash at Nauset Spit between January 

 1976 and January 1980. Five of these storms were monitored during this 

 period (Table 1). 



To 

 Recorder 

 in Truck 



ThroaJ 



of 



Washover Fon 



wash Probe 



Figure 5. Instrument setup during an overwash. 



29 



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