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NEEDS ASSESSMENT

COUNTRY PROFILES

Indonesia

Maldives

Seychelles

Sri Lanka

Thailand

TOPICS

Land assessment

Type of Damage

Damage classification

Salinity

Salinity Recovery

Impacts of subsidence on coastal areas

Crops

Livestock

Damage and recovery capacity

Tsunami in perspective

SALT AFFECTED LAND ASSESSMENT

The first step in dealing with affected agricultural lands by tsunami is to zone the damages in major categories for which later on solutions will be field test and implemented.

Zoning the damages

Damages are different by nature:

Direct crop destruction by uprooting, salt poisoning, flood, etc...

Erosion and scouring that modifies the topography, land levelling and the elimination of bunds (for paddy fields)

Soil fertility losses when upper layer is washed away

Deposition of salted sediment

Salt infiltration

Trash and debris accumulation.

or by intensity which depends on three main characteristics of the particular location:

the energy of the flood,

the type of soil coverage and vegetation, and

the soil hydraulic properties including drainage capacity.

As rice is the main crop in the region FAO-AGLW proposes below an example of approach developed for paddyfield but which can be easily extrapolated to any particular other crop.

Sketching impacts of the tsunami on paddy fields


Publications

FAO Field guide:The impact of salt water on agricultural land in Aceh Province.

20 hal untuk diketahui tentang dampak air laut pada lahan pertanian di propinsi NAD

The use of saline waters for crop production

Soil salinity assessment: methods and interpretation of electrical conductivity measurements

Water quality for agriculture

Related links

Water Resources, Development and Management website

 contact: tsunami@fao.org

© FAO, 2005