Index: Crop water stress index

Crop water stress index

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Basic information

Name Crop water stress index
Abbreviation CWSI
Formula C - A B - A
Variables
Expl. of Variables where points A and B represent the surface minus air temperature difference at a particular percent cover for a non-stressed and completely stressed crop, respectively, with a dry soil background. Points to the left of the line formed between points 1
Wavelengths
Source Original formula
Description Based on canopy temperature and meteorological conditions where points A and B represent the surface minus air temperature difference at a particular percent cover for a non-stressed and completely stressed crop, respectively, with a dry soil background. Points to the left of the line formed between points 1 and 4 represent a moist soil background and no water stress is assumed under these conditions. Point C was determined based on the measured NDVI and surface ? air temperature difference. From Eq. [2], a CWSI of 0 corresponds to a well-watered crop with a dry soil background, while 1 represents a water-stressed crop.

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Applications

Nr. Name Comment
1 Agriculture
2 Agriculture - Crop parameters
3 Agriculture - Precision Crop Management
4 Vegetation - Stress
5 Vegetation - Water
6 Vegetation - Water stress

References

Nr. Author/Title Year Comment
1 Barnes, E.M.; Clarke, T.R.; Richards, S.E.; Colaizzi, P.D.; Haberland, J.; Kostrzewski, M.; Waller, P.; Choi, C., Riley, E.; Thompson, T.; Lascano, R.J.; Li, H.; Moran, M.S. - Coincident detection of crop water stress, nitrogen status and canopy density using ground based multispectral data 2000
2 Bastiaanssen, Wim G. M.; Molden, David J.; Makin, Ian W. - Remote sensing for irrigated agriculture: examples from research and possible applications 2000
3 Ceccato, Pietro; Flasse, St?phane; Tarantola, Stefano; Jacquemoud, St?phane; Gr?goire, Jean-Marie - Detecting vegetation leaf water content using reflectance in the optical domain 2001
4 Lee, W. S.; Alchanatis, V.; Yang, C.; Hirafuji, M.; Moshou, D.; Li, C. - Sensing technologies for precision specialty crop production 2010
5 Moran, M. S.; Inoue, Y.; Barnes, E. M. - Opportunities and limitations for image-based remote sensing in precision crop management 1997
6 Pinter, P. J.; Hatfield, J. L.; Schepers, J. S.; Barnes, E. M.; Moran, M. S.; Daughtry, C. S. T.; Upchurch, D. R. - Remote sensing for crop management 2003

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