U.S. Department of Energy Office of Biological and Environmental Research

BER Research Highlights


Modeling Study of Irrigation Effects on Global Surface Water and Groundwater Resources
Published: August 25, 2015
Posted: December 11, 2015

The hydrological cycle is influenced by climate, but also regulated extensively by human activities such as irrigation and groundwater pumping that also respond to climate. A team of scientists, led by U.S. Department of Energy researchers at Pacific Northwest National Laboratory, presented a first-of-its-kind study that looks at impacts of irrigation on both surface water and groundwater resources at the global scale under the Coupled Model Intercomparison Project Phase 5 climate scenarios. The team conducted three different sets of numerical experiments driven by bias-corrected climate projections from five general circulation models (GCMs) to analyze the effect of irrigation on global surface water (SW) and groundwater (GW) resources. They found that irrigation could lead to SW/GW depletion in many intensely irrigated regions. Irrigation depending primarily on SW tends to have larger impacts on low-flow than high-flow conditions, suggesting increased vulnerability for drought. By the end of this century, combined effects of increased irrigation water demand and amplified temporal-spatial variability of water supply may lead to severe local irrigation water scarcity. The team highlighted the need to account for the effects of irrigation and its water sources in assessing regional climate change impacts.

Reference: Leng, G., M. Huang, Q. Tang, and L. R. Leung. 2015. “A Modeling Study of Irrigation Effects on Global Surface Water and Groundwater Resources under a Changing Climate,” Journal of Advances in Modeling Earth Systems 7(3), 1285–304. DOI: 10.1002/2015MS000437. (Reference link)

Contact: Dorothy Koch, SC-23.1, (301) 903-0105
Topic Areas:

  • Research Area: Earth and Environmental Systems Modeling

Division: SC-23.1 Climate and Environmental Sciences Division, BER

 

BER supports basic research and scientific user facilities to advance DOE missions in energy and environment. More about BER

Recent Highlights

Aug 24, 2019
New Approach for Studying How Microbes Influence Their Environment
A diverse group of scientists suggests a common framework and targeting of known microbial processes [more...]

Aug 08, 2019
Nutrient-Hungry Peatland Microbes Reduce Carbon Loss Under Warmer Conditions
Enzyme production in peatlands reduces carbon lost to respiration under future high temperatures. [more...]

Aug 05, 2019
Amazon Forest Response to CO2 Fertilization Dependent on Plant Phosphorus Acquisition
AmazonFACE Model Intercomparison. The Science Plant growth is dependent on the availabi [more...]

Jul 29, 2019
A Slippery Slope: Soil Carbon Destabilization
Carbon gain or loss depends on the balance between competing biological, chemical, and physical reac [more...]

Jul 15, 2019
Field Evaluation of Gas Analyzers for Measuring Ecosystem Fluxes
How gas analyzer type and correction method impact measured fluxes. The Science A side- [more...]

List all highlights (possible long download time)