Share Email Print
cover

Proceedings Paper

Investigation of spatial relationships between crop coefficients and specific ground based vegetation indices for Karla watershed, Greece
Author(s): M. Spiliotopoulos; A. Loukas; N. Mylopoulos; L. Toulios; G. Stancalie
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The objective of this work is the investigation of the specific relationships between actual evapotranspiration based crop coefficients and vegetation indices adapted to Karla Watershed, central Greece. Surface Energy Balance Algorithm for Land (SEBAL) was used to derive monthly actual evapotranspiration (ET) and ETrF values during the growing season of 2012. The methodology was developed using medium resolution Landsat 7 ETM+ images. Meteorological data from the archive of the Institute for Research and Technology, Thessaly (I.RE.TE.TH) have also been used. Fields with cotton, wheat, alfalfa, corn and sugar beets are utilized. During the same period, in-situ radiometric measurements were generated with the use of the field spectro-radiometer GER1500 giving specific spectral signatures for each crop. Filtering of reflectance values with the use of relative spectral responses (RSR) gives the opportunity to match the spectral measurements with Landsat ETM+ bands and compute VI like NDVI, SAVI, EVI and EVI2 using the same remote sensing formulas as the ETM+ conventional procedures. New relationships are derived and NDVI, SAVI, EVI and EVI2 are tested separately for each crop. Special attention is given to the constant L inside the SAVI relationship. The main advantage of the new approach is that is more crop specific and it less time consuming because there is no need for atmospheric correction.

Paper Details

Date Published: 12 August 2014
PDF: 10 pages
Proc. SPIE 9229, Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014), 92290J (12 August 2014); doi: 10.1117/12.2066095
Show Author Affiliations
M. Spiliotopoulos, Univ. of Thessaly (Greece)
Institute for Research and Technology of Thessaly (Greece)
A. Loukas, Univ. of Thessaly (Greece)
Institute for Research and Technology of Thessaly (Greece)
N. Mylopoulos, Univ. of Thessaly (Greece)
Institute for Research and Technology of Thessaly (Greece)
L. Toulios, National Agricultural Research Foundation (Greece)
G. Stancalie, National Meteorological Administration (Romania)


Published in SPIE Proceedings Vol. 9229:
Second International Conference on Remote Sensing and Geoinformation of the Environment (RSCy2014)
Diofantos G. Hadjimitsis; Kyriacos Themistocleous; Silas Michaelides; Giorgos Papadavid, Editor(s)

© SPIE. Terms of Use
Back to Top