| NP | Natural Park |
| HNP | Hondo Natural Park |
| MTNP | Mata and Torrevieja Lagoons Natural Park |
| SPNP | Salt marshes of Santa Pola Natural Park |
| TCM | Travel Cost Method |
| CVM | Contingent Valuation Method |
| P1 | Period 1 |
| P2 | Period 2 |
| CS | Consumer Surplus |
| S1 | Cost Scenario 1 |
| S2 | Cost Scenario 2 |
| S3 | Cost Scenario 3 |
| FC | Fuel Cost |
| OTC1 | Opportunity Travel Time Cost (0.06 €/km) |
| OTC2 | Opportunity Travel Time Cost (0.14 €/km) |
| WAD | Weighted Average Distance |
| WAT | Weighted Average Time |
| WTP | Willingness to Pay |
| WTPEF | Willingness to Pay an Entrance Fee (logit analysis) |