nh f 
yp Loter Survey 
1) 
(14) NOLIWAS13 
DISTANCE (FT) “I 
Figure 7. Profile line coordinate system (from DeWall, 1979). 
SURVEY A 
SURVEY B 
MSL- SHORELIN 
CHANGE 
SUBAERIAL UNIT Cross- Sectional Unit Distance. 
VOLUME - Area Change xX Parallel to 
CHANGE Between Surveys AandB Shore 
(m°/m) (m?) (1 m/m) 
Figure 8. Definition of MSL shoreline change and above 
MSL unit volume change (from DeWall, 1979). 
29 
