KBDI: Keetch-Byram Drought Index

UTOKYO/WTLAB/KBDI/v1
Dataset Provider
Earth Engine Snippet
ee.ImageCollection("UTOKYO/WTLAB/KBDI/v1")
Tags
kbdi drought rainfall lst-derived utokyo wtlab

Description

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. This system is based primarily on recent rainfall patterns. It is a measure of meteorological drought; it reflects water gain or loss within the soil.

The scale ranges from 0 (no moisture deficit) to 800 (extreme drought). The range of the index is determined by assuming that there is 20 cm of moisture in a saturated soil that is readily available to the vegetation (Keetch and Byram, 1968). KBDI is world widely used for drought monitoring for national weather forecast, wildfire prevention and usefully especially in regions with rain-fed crops.

Bands

Resolution
4000 meters

Y Resolution
4000 meters

Bands

Name Min Max Description
KBDI 0 800

Keetch-Byram Drought Index

Terms of Use

Terms of Use

Licensed under the Creative Commons Attribution 4.0 International License (CC BY 4.0).

Citations

Citations:
  • 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.

Explore in Earth Engine

var collection = ee.ImageCollection('UTOKYO/WTLAB/KBDI/v1')
  .select('KBDI')
  .filterDate('2019-01-01', '2019-01-10');
var band_viz = {
  min: 0,
  max: 800,
  palette: [
    '001a4d', '003cb3', '80aaff', '336600', 'cccc00', 'cc9900', 'cc6600',
    '660033'
  ]
};
Map.addLayer(collection.mean(), band_viz, 'ozone');
Map.setCenter(-179, 60, 2);