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| Titel |
Impacts of soil and groundwater salinization on tree crop performance in post-tsunami Aceh Barat, Indonesia |
| VerfasserIn |
C. Marohn, A. Distel, G. Dercon, Wahyunto, R. Tomlinson, M. v. Noordwijk, G. Cadisch |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 12, no. 9 ; Nr. 12, no. 9 (2012-09-12), S.2879-2891 |
| Datensatznummer |
250011099
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| Publikation (Nr.) |
 copernicus.org/nhess-12-2879-2012.pdf |
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| Zusammenfassung |
| The Indian Ocean tsunami of December 2004 had far reaching consequences for
agriculture in Aceh province, Indonesia, and particularly in Aceh Barat
district, 150 km from the seaquake epicentre. In this study, the spatial
distribution and temporal dynamics of soil and groundwater salinity and
their impact on tree crops were monitored in Aceh Barat from 2006 to 2008.
On 48 sampling points along ten transects, covering 40 km of coastline, soil
and groundwater salinity were measured and related to mortality and yield
depression of the locally most important tree crops. Given a yearly rainfall
of over 3000 mm, initial groundwater salinity declined rapidly from over 10
to less than 2 mS cm−1 within two years. On the other hand, seasonal
dynamics of the groundwater table in combination with intrusion of saline
water into the groundwater body led to recurring elevated salinity,
sufficient to affect crops. Tree mortality and yield depression in the
flooded area varied considerably between tree species. Damage to coconut
(65% trees damaged) was related to tsunami run-up height, while rubber
(50% trees damaged) was mainly affected by groundwater salinity. Coconut
yields (−35% in average) were constrained by groundwater Ca2+ and
Mg2+, while rubber yields (−65% on average) were related to
groundwater chloride, pH and soil sodium. These findings have implications
on planting deep-rooted tree crops as growth will be constrained by ongoing
oscillations of the groundwater table and salinity. |
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