| Term |
Description |
| Lag deposit |
Residual accumulation of coarse fragments left behind after waves/currents have winnowed and washed away finer material. |
| Lagrangian |
An observation that moves with the field of flow (e.g. float tracking). |
| Lagrangian |
Observation that moves with the field of flow (e.g. float tracking) |
| LAT |
Lowest Astronomical Tide |
| Leachate |
Water that has passed through a soil and that contains soluble material removed from that soil. |
| Leaching |
The downward movement of a material in solution through soil. |
| LiDAR |
Light Detection and Range |
| Lithology |
The general character of a rock or sediment expressed in terms of its mineral composition, its texture and grain size and included structures. |
| Littoral |
Of, or pertaining to, the shore. |
| Littoral drift, littoral transport |
The movement of beach material in the littoral zone by waves and currents. Includes movement parallel (longshore drift) and perpendicular (cross-shore transport) to the shore. |
| LNR |
Local Nature Reserve |
| Locally generated waves |
Waves generated within the immediate vicinity, say within 50 km, of the point of interest. |
| Long Wave |
Waves with periods greater than 30 seconds. |
| Longshore |
Parallel and close to the coastline. |
| Longshore bar |
Bar running approximately parallel to the shoreline. |
| Longshore drift |
Movement of (beach) sediments approximately parallel to the coastline. |
| Low water (LW) |
The minimum height reached by a falling tide. |
| Lunar tide |
That part of the tide on the Earth due solely to the Moon as distinguished from that part due to the Sun. |
| LW |
Low Water |
| LWM |
Low Water Mark |
