Final Technical Report - weADAPT

From the mathematic model simulation using DSSAT crop model, the result
shows that future climate condition, according to the climate scenario from CCAM
climate model, may have slight negative impact on the rain-fed rice production in the
study site in Lao PDR, Savannakhet province. The yield of rice productivity in
Savannakhet province would reduced by almost 10% under climate condition at CO 2
concentration of 540 ppm, but will be back to almost the same as baseline condition
under the climate condition at CO 2 concentration of 720 ppm.
For the case study in Thailand, the simulation result shows that climate change
has positive impact on the rice productivity in the study area in Ubonratchathani province.
The simulation shows trend of increasing in yield of rice productivity under future
climate condition. The increase in productivity yield could be as high as 10-15% in some
areas.
In Viet Nam, where farmer grows 2 crop cycles in a year, the simulation result
shows different climate impacts on yield of rice productivity in each crop cycle. The
winter-spring crop will get slight impact from climate change as the yield will increase
slightly from baseline year under climate condition at atmospheric CO 2 concentration of
540 ppm, but will drop slightly from baseline year under climate condition at CO 2
concentration of 720 ppm. However, the summer-autumn crop tends to get severe impact
from climate change. The simulation shows significant decline in summer-autumn crop
productivity by approximately 8-12% under climate condition at CO 2 concentration of
540 ppm and would sharply drop up to almost 50% in some areas under climate condition
at CO 2 concentration of 720 ppm.
Final technical report – AIACC AS07 19