Vegetation indices to aid areal evapotranspiration estimations

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Multiyear (1982-1990) monthly areal evapotranspiration (AET) was modeled with the Morton approach at the Solar and Meteorological Surface Observation Network stations within the conterminous United States. The AET values were correlated with satellite-derived, monthly maximum-value-composited Normalized Difference Vegetation Indices (NDVI) at half-degree resolution over the growing season (April-October). Generally, the strongest monthly correlation was obtained when the NDVI values were related to the AET estimates of the previous month. Geographically, both the monthly and growing-season averaged NDVI-AET relationships were best over the prairie (with an r=0.66±0.21 and 0.55±0.22, and a RMSE=26.75±12.62 and 6.24±1.67 mm month-1, respectively) and worst along the coastline and in the most humid, southeast region of the conterminous United States, where the Morton approach may function improperly.

Original languageEnglish
Pages (from-to)368-372
Number of pages5
JournalJournal of Hydrologic Engineering
Volume7
Issue number5
DOIs
Publication statusPublished - Sep 2002

Fingerprint

Evapotranspiration
vegetation index
evapotranspiration
NDVI
growing season
prairie
Satellites
coast

Keywords

  • Evapotranspiration
  • Vegetation

ASJC Scopus subject areas

  • Environmental Science(all)
  • Environmental Chemistry
  • Water Science and Technology
  • Civil and Structural Engineering

Cite this

Vegetation indices to aid areal evapotranspiration estimations. / Szilagyi, J.

In: Journal of Hydrologic Engineering, Vol. 7, No. 5, 09.2002, p. 368-372.

Research output: Contribution to journalArticle

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