Water balance of forested mountainous watersheds using satellite-derived actual evapotranspiration

Athanasios G. Loukas; Lampros Vasiliades; Christos Domenikiotis; Nicolas R. Dalezios

doi:10.1117/12.511624

24 February 2004 Water balance of forested mountainous watersheds using satellite-derived actual evapotranspiration

Athanasios G. Loukas, Lampros Vasiliades, Christos Domenikiotis, Nicolas R. Dalezios

Proceedings Volume 5232, Remote Sensing for Agriculture, Ecosystems, and Hydrology V; (2004) https://doi.org/10.1117/12.511624
Event: Remote Sensing, 2003, Barcelona, Spain

Abstract

The use of actual evapotranspiration derived by satellite data at watershed scale in water balance modelling of forested mountainous watersheds is studied. Mean monthly maximum composites of the Normalized Difference Vegetation Index (NDVI), derived from the National Oceanic and Atmospheric Administration’s (NOAA) / Advanced Very High Resolution Radiometer (AVHRR) were correlated with monthly actual evapotranspiration rates estimated by a water balance model. The water balance model was applied to three mountainous and forested watersheds of Central Thessaly in Greece and the actual basin-wide evapotranspiration was estimated using two methods for the estimation of basin wide precipitation and two methods of potential evapotranspiration. The derived values of actual evapotranspiration were then correlated to NDVI data, and the developed equations were validated temporally and spatially. The actual evapotranspiration estimates, derived from NDVI and used in the water balance model, resulted in equally accurate simulations of monthly runoff when compared with the simulations acquired from the classical application of water balance model.

Citation Download Citation

Athanasios G. Loukas, Lampros Vasiliades, Christos Domenikiotis, and Nicolas R. Dalezios "Water balance of forested mountainous watersheds using satellite-derived actual evapotranspiration", Proc. SPIE 5232, Remote Sensing for Agriculture, Ecosystems, and Hydrology V, (24 February 2004); https://doi.org/10.1117/12.511624

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