dashed lie (GP) represents gross production as in the figure on pro-active
investments. The lower line (NP) representing net production, results from
the gross production and the damage when no measures are taken. Reduction
of damage can be achieved by pro-active investments in sectoral (deltaSD)
or integrated coastal zone management (deltaID). The time lag between the
start of the investments is larger for integrated (deltaIT) than for sectoral
(deltaST) CZM because the former involves more extensive analysis and planning.
However, net production with integrated CZM (NP/ICZM) will eventually be
higher than net production with sectoral CZM (NP/SCZM), again because of
the external effects.