| Abbreviation | Definition |
|---|---|
| SWAP | Seismic Wave Analysis Program |
| SWAT | Soil and Water Assessment Tool |
| SWI | Sea Water Injection |
| SWTV | Surface Water Temporal Variability |
| SYV | Santa Ynez Valley |
| SZC | Steppe Zone Complex |
| SZP | Slant Zenithal Projection |
| TAMU | Texas Agriculture and Mining University |
| TB | Tacoma Basin |
| TBB | Tillamook Bay Basin |
| TBM | Tunnel Boring Machine |
| TD | Trinchera Dolina |
| TDPS | Lake Titicaca, Desaguadero River, Lake Poopo, and the Salt Lake of Coipasa |
| TDS | Terra Del Sol |
| TE | Torrential Erosion |
| TENR | Technology Enhanced Natural Radiation |
| TFZ | Tjörnes Fracture Zone |
| TIH | Trip In Hole |
| TIREM | Terrain Integrated Rough Earth Model |
| TMP | Tin Mountain Pegmatite |