| Term |
Description |
| Hrms |
Root mean square wave height. |
| Hsig |
Significant wave height = average height of the waves which comprise the highest 33% of waves in a given sample period (typically 20 to 30 minutes). |
| ha |
Hectares (1 ha being equivalent to approximately 2.4 acres). |
| Habitat |
The local environment occupied by an organism. |
| Habitat creation |
The recreation of a natural habitat by man. |
| Harmonic Analysis |
Process of measuring or calculating the relative amplitudes and frequencies of all the significant harmonic components present in a given wave form. |
| Harmonic constants |
The amplitudes and epochs of the harmonic constituents of the tide or tidal current at any place. |
| Harmonic function |
In its simplest form, a quantity that varies as the cosine of an angle that increases uniformly with time. It may be expressed by the formula: y = A cos at, in which y is a function of time (t), A is a constant coefficient, and a is the rate of change in the angle at. |
| HAT |
Highest Astronomical Tide |
| Head |
The difference in water level at either end of a strait, channel, inlet, etc. |
| High water (HW) |
The maximum height reached by a rising tide. |
| High water mark |
A line or mark left upon tide flats, beach, or along shore objects indicating the elevation of the intrusion of high water. |
| Hindcast |
The prediction of wave characteristics using meteorological information as opposed to the measurements of these features. |
| Hinterland |
The infrastructure and transportation routes associated with the port, used to define the area of land behind a port |
| Hmax |
Maximum wave height in a recorded burst of raw data. |
| Hmean |
Mean wave height. |
| HMWBs |
Heavily Modified Water Bodies |
| Holocene |
The last 10,000 years in the geological timescale. |
| HPLC |
High Performance Liquid Chromatography |
| HTA |
Historical Trends Analysis |
| HW |
High Water |
| HWM |
High water Mark |
| Hydrodynamic |
The processes and science associated with the flow and motion in water produced by applied forces. |
| Hydrodynamic |
The flow and motion in water produced by applied forces |
