Hydrologic and land-energy feedbacks of agricultural water management practices

Ian M. Ferguson, Reed M. Maxwell

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

Recent studies demonstrate strong interdependence between groundwater dynamics, land surface water and energy fluxes over some regions, including significant negative correlation between latent heat flux and groundwater depth. Other studies show that irrigation increases latent heat flux and decreases the Bowen ratio (ratio of sensible to latent heat flux), with subsequent feedbacks on local and regional climate. We use an integrated hydrologic model to evaluate impacts of groundwater pumping, irrigation, and combined pumping and irrigation on groundwater storage, land surface fluxes, and stream discharge over the Little Washita River watershed in the Southern Great Plains of North America. Pumping and irrigation are shown to impact simulated water and energy fluxes at local and watershed scales, with the magnitude of impacts governed by local water table depth. When pumping and irrigation are combined, irrigation has a dominant impact on spatially distributed surface energy processes while pumping has a dominant impact on basin-integrated hydrologic conditions.

Original languageEnglish (US)
Article number014006
JournalEnvironmental Research Letters
Volume6
Issue number1
DOIs
StatePublished - Jan 2011
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Environmental Science(all)
  • Public Health, Environmental and Occupational Health

Keywords

  • hydrology
  • land-atmosphere interactions
  • land-energy balance
  • water management

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