スケールの範囲は 0(水分不足なし)~ 800(極度の干ばつ)です。指数の範囲は、植生が容易に利用できる飽和土壌に 20 cm の水分が含まれていることを前提として決定されます(Keetch and Byram, 1968)。KBDI は、国の天気予報や山火事の防止のための干ばつモニタリングに世界中で使用されており、特に天水農業地域で役立ちます。
Wataru Takeuchi, Soni Darmawan, Rizatus Shofiyati, Mai Van Khiem, Kyaw San Oo, Uday Pimple
and Suthy Heng, 2015. Near-real time meteorological drought monitoring and early warning
system for croplands in Asia.
36th Asian conference on remote sensing (ACRS): Manila, Philippines, Oct. 20, 2015.
[[["わかりやすい","easyToUnderstand","thumb-up"],["問題の解決に役立った","solvedMyProblem","thumb-up"],["その他","otherUp","thumb-up"]],[["必要な情報がない","missingTheInformationINeed","thumb-down"],["複雑すぎる / 手順が多すぎる","tooComplicatedTooManySteps","thumb-down"],["最新ではない","outOfDate","thumb-down"],["翻訳に関する問題","translationIssue","thumb-down"],["サンプル / コードに問題がある","samplesCodeIssue","thumb-down"],["その他","otherDown","thumb-down"]],[],[],["The dataset provides the Keetch-Byram Drought Index (KBDI), a measure of soil and duff layer dryness, ranging from 0 (no deficit) to 800 (extreme drought). The index increases during dry periods and decreases with rainfall, reflecting meteorological drought conditions. The data, provided by the University of Tokyo, is updated daily from 2007-01-01 to 2025-02-21 and is available via Google Earth Engine. Pixel size is 4000 meters. It is tagged for drought and rainfall.\n"]]