of the Verde Island Passage, Philippines - weADAPT

climate change vulnerability assessment of the verde island passage, philippines
Kampumpong River—Batangas City
Between 1947 to 2009, erosion of about 200 m occurred
along the mouth of Kampungpong River in Batangas City
(Figure 28). Topographic maps reflecting conditions prior to
1947 indicate that mangroves covered this area. However, a
Google Earth® image indicates that the mangrove is no longer
there. Removal of the mangrove is likely linked to the erosion.
Large constructions and expansions of piers along the coast of
Batangas City also took place in recent years. These include
the oil refineries of Caltex and Shell located north and south of
the river mouth, respectively; the expanded Batangas pier and
a large excavated land near Santa Clara prior to 2009. These
coastal modifications would have altered the pathways of
sediments resulting to erosion.
Figure 28. Changes in shoreline position
along Kampumpong-Batangas City coast.
Abra de Ilog
The river mouth and flanks of Abra de
Ilog, from 1953 to 2001, show a net land
gain of about 300 m and erosion of ~150
m between 2001 and 2009 (Figure 29).
Erosion is probably due to the construction
of a pier about 2 km east of the river
mouth. Pebble picking activities is most
likely contributing to, if not the main cause,
of the erosion west of the river mouth.
Figure 29. Changes in shoreline position along Abra de Ilog coast.
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