| 词条 | Keetch–Byram drought index | |||||||||||||||
| 释义 |
The Keetch–Byram drought index (KBDI), created by John Keetch and George Byram in 1968 for the United States Department of Agriculture's Forest Service, is a measure of drought conditions. It is commonly used for the purpose of predicting the likelihood and severity of wildfire. It is calculated based on rainfall, air temperature, and other meteorological factors[1]. The KBDI is an estimate of the soil moisture deficit, which is the amount of water necessary to bring the soil moisture to its full capacity. A high soil moisture deficit means there is little water available for evaporation or plant transpiration[2]. This occurs in conditions of extended drought, and has significant effects on fire behaviour. In the United States, it is expressed as a range from 0 to 800, referring to hundredths of an inch of deficit in water availability; in countries that use the metric system, it is expressed from 0 to 200, referring to millimetres[3].
See also
References1. ^{{cite web |url=http://www.srs.fs.usda.gov/pubs/viewpub.jsp?index=40 |title=A Drought Index for Forest Fire Control |authors=Keetch, John J.; Byram, George M. |date= |website=srs.fs.usda.gov |publisher=USDA Forest Service Southern Research Station |access-date=August 11, 2016 |quote=(Date: 1968) Res. Paper SE-38. 32 pp. Asheville, NC: U.S. Department of Agriculture, Forest Service}} {{DEFAULTSORT:Keetch-Byram drought index}}{{climate-stub}}2. ^{{cite journal|last1=Finkele|first1=Klara|last2=Mills|first2=Graham A.|title=National gridded drought factors and comparison of two soil moisture deficit formulations used in prediction of Forest Fire Danger Index in Australia|journal=Australian Meteorological Magazine|date=September 2006|volume=55|issue=3|pages=183–197}} 3. ^{{cite web|title=Weather and Bushfire Behaviour|url=https://www.rfs.nsw.gov.au/__data/assets/pdf_file/0020/23537/Bush-Fire-Bulletin-LIFTOUT-WeatherandBushFireBehaviour.pdf|publisher=NSW Rural Fire Service|accessdate=20 March 2018}} 4. ^https://www.rfs.nsw.gov.au/__data/assets/pdf_file/0020/23537/Bush-Fire-Bulletin-LIFTOUT-WeatherandBushFireBehaviour.pdf 5. ^https://www.wfas.net/index.php/keetch-byram-index-moisture--drought-49 6. ^http://twc.tamu.edu/docs/TFS_KBDI_Update.pdf 5 : Droughts|Hazard scales|Hydrology|Wildfires|Meteorological indices |
|||||||||||||||
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。