Table 3 Comparison of end-century, RCP 8.5 median r values and inlet Type projected by the reduced complexity model RAPSTA with the projections obtained from the process based snap-shot approach of Duong et al. 13 for the 3 STIs.
Model | r (2100) | Trend of r change from present | Bruun classification | Inlet Type |
|---|---|---|---|---|
Negombo lagoon (Present condition: Type 1 – Permanently open, locationally stable, r = 221) | ||||
RAPSTA | 90 | Decrease | Stable (fair to poor) | Type 1 |
Process based snap-shot model | 75 | Decrease | Stable (fair to poor) | Type 1 |
Kalutara lagoon (Present condition: Type 2 – Permanently open, alongshore migrating, r = 11) | ||||
RAPSTA | 7 | Decrease | Unstable | Type 2 or 3 |
Process based snap-shot model | 6 | Decrease | Unstable | Type 2 |
Maha Oya river (Present condition: Type 3 – Seasonally/intermittently open, locationally stable, r = 1) | ||||
RAPSTA | 7 | Increase | Unstable | Type 2 or 3 |
Process based snap-shot model | 5 | Increase | Unstable | Type 3 |
