ACCRETING (44.4%) 



ERODING (30.1 X) 



STABLE (25.4%) 



Figure 34. Summary of shoreline movement for 

 coastal reach 3, 1857-1983 



Much of the central section of the bay is slightly erosional or stable. The 

 southwest portion, in the vicinity of Venning, Anderson, and Bull Creeks, has 

 the most rapid erosion. Orientation of this segment of the bay makes it most 

 susceptible to waves from the northeast. Overall, this shoreline appears sta- 

 ble to slightly eroding. 



90. Standard deviation, a measure of variation in shoreline change 

 rates, is small in comparison with reaches 1, 2, and 3 (Figure 35). Maximum 

 standard deviations reach ±3 m/year, although most of the shoreline does not 

 exceed ±2 m/year. The trend in reaches 1, 2, and 3 of greatest variability in 

 shoreline position in the vicinity of inlets is not evident in this reach. 



The small tidal creeks entering Bull Bay have limited discharge and, there- 

 fore, limited ability to erode/deposit sediment. 



91. Maximum net movement (Figure 36) reaches a peak in the northeast 

 and southwest corners of the bay, where average accretion and erosion, respec- 

 tively, were at their maximums. Maximum net movement up to 300 m is evident, 

 but most of the shoreline has had a net change of less than 100 m over the 

 span of record. 



76 



