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Ganl. Bull. Singapore 70 (Suppl. 1) 2018 
Fig. 1. Geographical location of the Nee Soon freshwater swamp forest in Singapore. 
Table 1. Summary of essential information in mode setup. 
Input type 
Scenario 1 
(Search for steady state 
condition) 
Scenario 2 
(Real simulation) 
Simulation duration 
01/01/2001 -31/12/2012 
01/01/2001 - present 
Grid size 
20x20 m 
20x20 m 
Soil type 
Silty sand 
Silty sand 
(hydraulic conductivity = 
(hydraulic conductivity = 
4.05xl0 5 m/s) 
4.05X10 5 m/s) 
Rainfall 
No rainfall 
Observed rainfall 
Evapotranspiration 
Not triggered 
2-layer water balance model 
Initial condition 
Fully saturated soil 
Extracted from Scenario 1 
(at 01/01/2001) 
(condition at 31/12/2012) 
Inner boundary condition 
(reservoir) 
Mean observed reservoir levels 
Observed reservoir levels 
Outer boundary condition 
(land-land) 
-5% gradient 
-5% gradient 
Outer boundary condition 
(land-water) 
Zero flux 
Zero flux 
