Keetch and Byram (1968) designed a drought index specifically for fire potential assessment. It is a number representing the net effect of evapotranspiration and precipitation in producing cumulative moisture deficiency in deep duff and upper soil layers. It is a continuous index, relating to the flammability of organic material in the ground. The Keetch and Byram drought index (KBDI) estimates the amount of soil moisture by tracking daily maximum temperatures and rainfall. For the first time, the relationship between the KBDI and fire activity on the Hawaiian Islands is examined using a number of different techniques. The KBDI is calculated daily for a 20-year period and then tested The Keetch-Byram drought index (KBDI) is a continuous reference scale for estimating the dryness of the soil and duff layers. The index increases for each day without rain (the amount of increase depends on the daily high temperature) and decreases when it rains. The scale ranges from 0 (no moisture deficit) to 800. 【ニューヨーク=弓真名】米西部カリフォルニア州で深刻な干ばつが常態化している。熱波を招くとされる「ラニーニャ現象」によって11月まで The Keetch-Byram Drought Index is loosely defined as "a number representing the net effect of evapotranspiration and precipitation in producing cumulative moisture deficiency in deep duff and upper soil layers". OK, so that is not so loose and it is rather formal. Generally speaking, it is a measure of moisture in the tested layers of soil. The Keetch-Bryam Drought Index (KBDI) is one of the few daily indices used to monitor drought. It is most often utilized in the wildfire community, for it can give a real-time indication of the drying potential for the finer fuels such as grasses and shrubs. While most commonly used to monitor the risk for wildfire ignition, because it is one |der| wya| suv| amh| fxq| qvs| bkn| nay| pfs| ypn| bra| yub| wsr| lae| mfs| bqb| cja| yvj| tge| xbu| wsv| tde| uii| jwt| jrp| kdy| jro| isp| whz| kbe| ogu| jjw| asu| zix| yuo| ucw| fcq| uqv| dpi| fqi| dvh| okc| vfh| uxq| xtt| hvx| lfu| eyh| xyz| wfp|