Table 5 Stage division of groundwater and surface water samples based on HFE diagram4,78.
Stage | Sub-stage | Number and percentage of samples | ||||
|---|---|---|---|---|---|---|
Wet season of 2020 and 2023 | Dry season of 2021 and 2024 | Surface water and seawater | ||||
Pore aquifer samples | Fractured aquifer samples | Pore aquifer samples | Fractured aquifer samples | |||
Freshening stage | f1 | 5/20.83% | 6/25.00% | 3/13.04% | 1/6.25% | 2/7.69% |
f2 | 1/4.17% | 1/4.17% | – | – | – | |
f3 | 1/4.17% | 2/8.33% | 1/4.35% | 2/12.5% | – | |
f4 | – | – | – | – | – | |
Freshwater | – | 1/4.17% | – | – | – | |
Intrusion stage | i1 | – | 4/16.67% | – | 3/18.75% | – |
i2 | – | 10/41.67% | – | 1/6.25% | – | |
i3 | – | – | – | 7/43.75% | – | |
i4 | 1/4.17% | – | – | 1/6.25% | – | |
Seawater | 16/66.67% | – | 19/82.61 | 1/6.25% | 24/92.31% | |
Total | 24/100% | 24/100% | 23/100% | 16/100% | 26/100% | |
