Anthropogenic impacts on continental surface water fluxes

Impacts of reservoirs and irrigation water withdrawals on continental surface water fluxes are studied within the framework of the Variable Infiltration Capacity (VIC) model for a part of North America, and for Asia. A reservoir model, designed for continental‐scale simulations, is developed and implemented in the VIC model. The model successfully simulates irrigation water requirements, and captures the main effects of reservoir operations and irrigation water withdrawals on surface water fluxes, although consumptive irrigation water use is somewhat underestimated. For the North American region, simulated irrigation water requirements and consumptive irrigation water uses are 191 and 98 km3year−1, while the corresponding numbers for the Asian region are 810 and 509 km3year−1, respectively. The consumptive uses represent a decrease in river discharge of 4.2 percent for the North American region, and 2.8 percent for the Asian region. The largest monthly decrease is about 30 percent, for the area draining the Western USA in June. The maximum monthly increase in streamflow (28 percent) is in March for the Asian Arctic region.

[1]  Naota Hanasaki,et al.  A reservoir operation scheme for global river routing models , 2006 .

[2]  Dennis P. Lettenmaier,et al.  Effects of irrigation on the water and energy balances of the Colorado and Mekong river basins , 2006 .

[3]  Douglas L. Kane,et al.  Streamflow changes over Siberian Yenisei River Basin , 2004 .

[4]  J. D. Tarpley,et al.  The multi‐institution North American Land Data Assimilation System (NLDAS): Utilizing multiple GCIP products and partners in a continental distributed hydrological modeling system , 2004 .

[5]  C. Vörösmarty,et al.  Anthropogenic sediment retention: major global impact from registered river impoundments , 2003 .

[6]  P. de Rosnay,et al.  Integrated parameterization of irrigation in the land surface model ORCHIDEE. Validation over Indian Peninsula , 2003 .

[7]  Douglas L. Kane,et al.  Changes in Lena River streamflow hydrology: Human impacts versus natural variations , 2003 .

[8]  S. Sorooshian,et al.  A Shuffled Complex Evolution Metropolis algorithm for optimization and uncertainty assessment of hydrologic model parameters , 2002 .

[9]  Eric A. Rosenberg,et al.  A Long-Term Hydrologically Based Dataset of Land Surface Fluxes and States for the Conterminous United States: Update and Extensions* , 2002 .

[10]  Petra Döll,et al.  Global modeling of irrigation water requirements , 2002 .

[11]  Bart Nijssen,et al.  Global Retrospective Estimation of Soil Moisture Using the Variable Infiltration Capacity Land Surface Model, 1980–93 , 2001 .

[12]  Bart Nijssen,et al.  Eegional scale hydrology: I. Formulation of the VIC-2L model coupled to a routing model , 1998 .

[13]  Paul R. Ehrlich,et al.  Human Appropriation of Renewable Fresh Water , 1996, Science.

[14]  D. Lettenmaier,et al.  A simple hydrologically based model of land surface water and energy fluxes for general circulation models , 1994 .

[15]  Eric F. Wood,et al.  Correction of Global Precipitation Products for Orographic Effects , 2006 .

[16]  V. Gornitz Chapter 5 Impoundment, groundwater mining, and other hydrologic transformations: Impacts on global sea level rise , 2001 .

[17]  J. Holden,et al.  The storage and aging of continental runoff in large reservoir systems of the world , 1997 .

[18]  I. Shiklomanov,et al.  Assessment of water resources and water availability in the world , 1997 .