TY - JOUR
T1 - Global modeling of withdrawal, allocation and consumptive use of surface water and groundwater resources
AU - Wada, Y.
AU - Wisser, D.
AU - Bierkens, M. F. P.
PY - 2014/1/1
Y1 - 2014/1/1
N2 - To sustain growing food demand and increasing standard of living, global
water withdrawal and consumptive water use have been increasing rapidly.
To analyze the human perturbation on water resources consistently over
large scales, a number of macro-scale hydrological models (MHMs) have
been developed in recent decades. However, few models consider the
interaction between terrestrial water fluxes, and human activities and
associated water use, and even fewer models distinguish water use from
surface water and groundwater resources. Here, we couple a global water
demand model with a global hydrological model and dynamically simulate
daily water withdrawal and consumptive water use over the period
1979-2010, using two re-analysis products: ERA-Interim and MERRA. We
explicitly take into account the mutual feedback between supply and
demand, and implement a newly developed water allocation scheme to
distinguish surface water and groundwater use. Moreover, we include a
new irrigation scheme, which works dynamically with a daily surface and
soil water balance, and incorporate the newly available extensive Global
Reservoir and Dams data set (GRanD). Simulated surface water and
groundwater withdrawals generally show good agreement with reported
national and subnational statistics. The results show a consistent
increase in both surface water and groundwater use worldwide, with a
more rapid increase in groundwater use since the 1990s. Human impacts on
terrestrial water storage (TWS) signals are evident, altering the
seasonal and interannual variability. This alteration is particularly
large over heavily regulated basins such as the Colorado and the
Columbia, and over the major irrigated basins such as the Mississippi,
the Indus, and the Ganges. Including human water use and associated
reservoir operations generally improves the correlation of simulated TWS
anomalies with those of the GRACE observations.
AB - To sustain growing food demand and increasing standard of living, global
water withdrawal and consumptive water use have been increasing rapidly.
To analyze the human perturbation on water resources consistently over
large scales, a number of macro-scale hydrological models (MHMs) have
been developed in recent decades. However, few models consider the
interaction between terrestrial water fluxes, and human activities and
associated water use, and even fewer models distinguish water use from
surface water and groundwater resources. Here, we couple a global water
demand model with a global hydrological model and dynamically simulate
daily water withdrawal and consumptive water use over the period
1979-2010, using two re-analysis products: ERA-Interim and MERRA. We
explicitly take into account the mutual feedback between supply and
demand, and implement a newly developed water allocation scheme to
distinguish surface water and groundwater use. Moreover, we include a
new irrigation scheme, which works dynamically with a daily surface and
soil water balance, and incorporate the newly available extensive Global
Reservoir and Dams data set (GRanD). Simulated surface water and
groundwater withdrawals generally show good agreement with reported
national and subnational statistics. The results show a consistent
increase in both surface water and groundwater use worldwide, with a
more rapid increase in groundwater use since the 1990s. Human impacts on
terrestrial water storage (TWS) signals are evident, altering the
seasonal and interannual variability. This alteration is particularly
large over heavily regulated basins such as the Colorado and the
Columbia, and over the major irrigated basins such as the Mississippi,
the Indus, and the Ganges. Including human water use and associated
reservoir operations generally improves the correlation of simulated TWS
anomalies with those of the GRACE observations.
UR - http://adsabs.harvard.edu/abs/2014ESD.....5...15W
U2 - 10.5194/esd-5-15-2014
DO - 10.5194/esd-5-15-2014
M3 - Article
SN - 2190-4979
VL - 5
SP - 15
EP - 40
JO - Earth System Dynamics
JF - Earth System Dynamics
IS - 1
ER -