Table 3.
Required irrigation areas (RIA) and the percentage (RIA%) for the future periods. f1: 2020–2059, f2: 2060–2099.
| RCPs | Countries | Rainfed paddy area (km2) | Average RIA and RIA% | GFDL-ESM2M | IPSL-CM5A-LR | MIROC-ESM-CHEM | NorESM1-M | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| f1 | f2 | f1 | f2 | f1 | f2 | f1 | f2 | f1 | f2 | |||||
| RIA (km2) | RIA% | RIA (km2) | RIA% | RIA% | RIA% | RIA% | RIA% | RIA% | RIA% | RIA% | RIA% | |||
| RCP 4.5 | Cambodia | 11,420 | 119 | 1.0 | 63 | 0.5 | 1.8 | 1.3 | 0.1 | 0.0 | 1.4 | 0.6 | 0.9 | 0.3 |
| Lao PDR | 4590 | 105 | 2.3 | 94 | 2.0 | 3.7 | 4.0 | 1.5 | 1.2 | 3.3 | 2.3 | 0.7 | 0.7 | |
| Thailand | 32,220 | 516 | 1.6 | 300 | 0.9 | 2.0 | 1.0 | 0.6 | 0.5 | 2.8 | 1.7 | 1.1 | 0.5 | |
| VCHP | 643 | 63 | 9.8 | 68 | 10.6 | 18.8 | 17.8 | 0.6 | 5.2 | 12.5 | 12.7 | 7.3 | 6.9 | |
| Mekong delta | 9608 | 85 | 0.9 | 7 | 0.1 | 0.1 | 0.3 | 0.7 | 0.0 | 2.1 | 0.0 | 0.6 | 0.0 | |
| RCP 8.5 | Cambodia | 11,420 | 43 | 0.4 | 80 | 0.7 | 0.2 | 0.1 | 0.0 | 0.0 | 0.3 | 0.3 | 0.9 | 2.4 |
| Lao PDR | 4590 | 49 | 1.1 | 67 | 1.5 | 0.1 | 0.8 | 1.6 | 2.1 | 2.1 | 0.6 | 0.4 | 2.4 | |
| Thailand | 32,220 | 400 | 1.2 | 343 | 1.1 | 0.0 | 0.2 | 0.6 | 0.7 | 4.2 | 1.0 | 0.2 | 2.3 | |
| VCHP | 643 | 28 | 4.3 | 33 | 5.1 | 0.3 | 0.5 | 2.6 | 4.2 | 6.0 | 5.0 | 8.3 | 10.6 | |
| Mekong delta | 9608 | 57 | 0.6 | 62 | 0.6 | 0.0 | 0.1 | 0.6 | 0.3 | 0.1 | 0.1 | 1.6 | 2.1 | |
RIA Required irrigation area (km2), RIA% Required irrigation area (%), VCHP Vietnam Central High Plain.