Data and Methodology

For studying the effects of ENSO, data on monthly rainfall and temperature were collected from 18 meteorological stations in the Mekong River Delta (Fig. 18.1). ENSO indices including SSTA NiƱo 3+4 region and SOI were downloaded from the website of the Climate Prediction Center (CPC) of NOAA.

Climate forecasts were prepared and disseminated to 52 farmers of the two selected communes and to 20 officials and extension workers of Long An province during April to October 2003, prior to the onset of the rainy season, until the end of the summer-autumn crop season. The forecasts consisted of both climate information and hydro-logic conditions as required by users.

Two field surveys were carried out to identify the specific needs on climate forecast information, and to evaluate the use and effectiveness of the forecasts.

DSSAT V3.5 software (Hoogenboom et al. 1999) was used for rice crop simulation for the selected sites in Long An province (Ben Luc and Tan Thanh districts). The following inputs were made for the model simulation.

104.0 104.5 105.0 105.5 106.0 106.5 107.0 107.5 108.0

Fig. 18.1. Meteorological stations in the MRD (stars) and Long An province (dark shaded)

104.0 104.5 105.0 105.5 106.0 106.5 107.0 107.5 108.0

Fig. 18.1. Meteorological stations in the MRD (stars) and Long An province (dark shaded)

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