TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

... a soil/duff drought index [developed by Keetch and Byram (1968]) that ranges from 0 (no drought) to 800 (extreme drought) and is based on soil capacity of 8 inches of water. Factors in the index are maximum daily temperature, daily precipitation, antecedent precipitation, and annual precipitation.  4, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 1 CONT

The Keetch Byram Drought Index (KBDI) provides a daily measure of soil dryness, which, in turn, gives an indication of water stress in plants. The KBDI represents the net effect of precipitation and evapotranspiration in producing cumulative moisture deficiency in deep duff or upper soil layers. The KBDI has a range from 0 (no drought or soil moisture deficiency, i.e. soil at field capacity) to 2000 (extreme drought, maximum soil moisture deficiency possible). The index can be viewed as the amount of rain needed to bring the soil back to saturation, with one mm of rain reducing the index by 10 points. The 0-2000 point scale is divided into three drought classes: 0-999 = Low; 1000-1499 = Moderate; 1500 - 2000 = High. The KBDI is simple to calculate as it uses only two, daily weather observations - maximum temperature and 24-hour rainfall. The system functions in a book-keeping fashion where estimates of daily evapo-transpiration and measurements of precipitation increase or decrease the value of yesterdays index. The KBDI by itself is not a Fire Danger Rating System as it gives no indicate of the ease of ignition of the vegetation, or of the rate of fire spread, fire intensity and difficulty of control. It does however serve as a useful measure of drought occurrence.  7, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 2 CONT

Keetch-Byram Drought Index (KBDI): ... 0 - 200: Soil moisture and large class fuel moistures are high and do not contribute much to fire intensity. Typical of spring dormant season following winter precipitation. 200 - 400: Typical of late spring, early growing season. Lower litter and duff layers are drying and beginning to contribute to fire intensity. 400 - 600: Typical of late summer, early fall. Lower litter and duff layers actively contribute to fire intensity and will burn actively. 600 - 800: Often associated with more severe drought with increased wildfire occurrence. Intense, deep burning fires with significant downwind spotting can be expected. Live fuels can also be expected to burn actively at these levels.  9, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 3 CONT

... the Palmer Drought Index (PDI) and the Keetch-Byram Drought Index (KBDI) ... were [both] developed by John Keetch and George Byram, and originally were developed as aids for agriculture. The ... KBDI is used extensively in the eastern states and also in some parts of the west.  10, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 1 OBS

In the metric system the value of the index is usually assumed to range from 0 to 200 mm (even though 800 points actually corresponds to 204 mm).  3, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 2 OBS

Keetch-Byram Drought Index [is] a commonly-used drought index adapted for fire management applications ...  11, record 1, English, - Keetch%2DByram%20drought%20index

Record number: 1, Textual support number: 3 OBS

"Duff" is... an important term in the fire weather program of the US Forest Service, used to describe the partially decayed organic matter on the forest floor which can become highly combustible during drought periods and contribute to the longevity and spread of forest fires.... the Keetch-Byram Drought Index is sometimes referred to as the soil/duff drought index because it is a measure of how dry the soil and duff layers are.  6, record 1, English, - Keetch%2DByram%20drought%20index

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

On écrirait mieux «sècheresse».  2, record 1, French, - indice%20de%20s%C3%A9cheresse%20Keetch%2DByram

Record number: 1, Textual support number: 2 OBS

sècheresse : Cette graphie, puisée des Rectifications de l'orthographe recommandées par le Conseil supérieur de la langue française, est attestée dans le Petit Robert (2006).  3, record 1, French, - indice%20de%20s%C3%A9cheresse%20Keetch%2DByram

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 OBS

Le français n'a pas de statut officiel aux États-Unis. C'est donc dire que le nom des organismes américains ne comporte pas de traduction française officielle. Par contre, l'appellation proposée ici est répandue dans l'usage et entérinée par le Bureau de la traduction.  1, record 2, French, - Service%20des%20for%C3%AAts

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A portable, hand-operated piston pump with a short hose and a stirrup-shaped foot bracket for holding the pump on the floor or ground. The pump is used as a first aid for small fires and in cramped quarters. The pump is supplied by water from buckets and is a common US forest Service pump for back-pack operations.  3, record 3, English, - cylindrical%20pump%20tank

Record number: 3, Textual support number: 1 CONT

Two different types of pump tanks are available: one is cylindrical and the other is made to be used as a back-pack.... The cylindrical model has carrying handles either attached to the container or built into the pump handle, and the water is discharged by a built-in, hand-operated vertical piston pump to which a short rubber hose is attached. The pump is double-acting and discharges water on both the up and the down strokes. To operate a cylindrical pump tank, place it on the ground and put one foot on the extension bracket at the base to steady the unit.  1, record 3, English, - cylindrical%20pump%20tank

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Petite pompe à piston avec poignée, fixée à un seau d'eau par un support à semelle et comportant un petit tuyau souple muni d'un ajutage, utilisée comme moyen de première intervention.  1, record 3, French, - pompe%20%C3%A0%20%C3%A9trier

Record 3,  Textual support,  Spanish