Reach 4
(average y = 9)
Reaches 1-3
(average y =4)
Distance from Spit Tip-Miles
Figure 4-51. Variation of y with Distance Along the Spit,
before Inlet Condition
(a) Annual littoral drift trapped by inlet.
(b) After-inlet érosion rate of the beach to the left of the inlet.
(c) After-inlet nourishment needed to maintain the historié érosion
rate on the beach to the left of the inlet.
(d) After-inlet nourishment needed to eliminate érosion left of the
inlet.
SOLUTION: Divide the beach under study into four sand budget compartiments (controi volumes called reaches) as shown in Figure 4-50a. Shore
perpendicular boundaries are established where important changes in the
littoral System occur. To identify and quantify the befoY'e-'Ln'Let System, the continuity of the net transport rate along the spit must be
established. The terminology of Figure 4-43 and Table 4-13 is used
4-136
(average y = 9)
Reaches 1-3
(average y =4)
Distance from Spit Tip-Miles
Figure 4-51. Variation of y with Distance Along the Spit,
before Inlet Condition
(a) Annual littoral drift trapped by inlet.
(b) After-inlet érosion rate of the beach to the left of the inlet.
(c) After-inlet nourishment needed to maintain the historié érosion
rate on the beach to the left of the inlet.
(d) After-inlet nourishment needed to eliminate érosion left of the
inlet.
SOLUTION: Divide the beach under study into four sand budget compartiments (controi volumes called reaches) as shown in Figure 4-50a. Shore
perpendicular boundaries are established where important changes in the
littoral System occur. To identify and quantify the befoY'e-'Ln'Let System, the continuity of the net transport rate along the spit must be
established. The terminology of Figure 4-43 and Table 4-13 is used
4-136