Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality

  title={Global impacts of conversions from natural to agricultural ecosystems on water resources: Quantity versus quality},
  author={Bridget R. Scanlon and Ian D. Jolly and Marios Sophocleous and Lu Zhang},
  journal={Water Resources Research},
Past land use changes have greatly impacted global water resources, with often opposing effects on water quantity and quality. Increases in rain‐fed cropland (460%) and pastureland (560%) during the past 300 years from forest and grasslands decreased evapotranspiration and increased recharge (two orders of magnitude) and streamflow (one order of magnitude). However, increased water quantity degraded water quality by mobilization of salts, salinization caused by shallow water tables, and… 

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