Remote-sensing based groundwater recharge estimates in the Danube-Tisza sand plateau region of hungary

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Abstract

Mean annual recharge in the Danube-Tisza sand plateau region of Hungary over the 2000-2008 period was estimated at a 1-km spatial resolution as the difference of mean annual precipitation (P) and evapotranspiration (ET). The ET rates were derived from linear transformations of the MODIS daytime land surface temperature (T ;s) values with the help of ancillary atmospheric data (air temperature, humidity, and sunshine duration). The groundwater under the sand plateau receives about 75 ± 50 mm of recharge annually (the plus/minus value is the associated error, resulting from an assumed 5% error in both the P and ET values), which is about 14 ± 9 % of the regional mean annual P value of 550 mm. The largest continuous region with elevated recharge rates (about 180 ± 50 mm a -1 or 30 ± 8 % of P) occur in the south-western part of the plateau due to more abundant precipitation (around 580 mm a -1), while recharge is the smallest (about 40 ± 40 mm a -1 or 7 ± 7 % of P) under forested areas. Typically, lakes, wetlands, river valleys, and certain afforested areas in the north-central part of the region act as discharge areas for groundwater.

Original languageEnglish
Pages (from-to)64-72
Number of pages9
JournalJournal of Hydrology and Hydromechanics
Volume60
Issue number1
DOIs
Publication statusPublished - Mar 1 2012

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Keywords

  • Danube-Tisza Sand Plateau
  • Groundwater Recharge
  • MODIS Data

ASJC Scopus subject areas

  • Water Science and Technology
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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