Water Resources Research

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Mixing‐induced precipitation: Experimental study and multiscale numerical analysis
Water Resources Research - Tập 44 Số 6 - 2008
Alexandre M. Tartakovsky, G. D. Redden, Peter C. Lichtner, Tim Scheibe, Paul Meakin
Laboratory experiments, pore‐scale simulations, and continuum (Darcy) ‐scale simulations were used to study mixing‐induced precipitation in porous media. In the experimental investigation, solutions containing Na2CO3 and CaCl2 were each injected in different halves of a quasi two‐dimensional flow cell filled with quartz sand. A...... hiện toàn bộ
Evolution of hydraulic conductivity by precipitation and dissolution in carbonate rock
Water Resources Research - Tập 39 Số 1 - 2003
Olga Singurindy, Brian Berkowitz
The evolution of hydraulic conductivity and flow patterns, controlled by simultaneous precipitation and dissolution in porous rocks, was examined in a series of laboratory experiments. Linear flow experiments were performed in columns of crushed calcareous sandstone by injecting different concentrations of HCl/H2SO4 mixtures at various flow rates. ...... hiện toàn bộ
Building conceptual models of field‐scale uranium reactive transport in a dynamic vadose zone‐aquifer‐river system
Water Resources Research - Tập 44 Số 12 - 2008
Steven B. Yabusaki, Yilin Fang, Scott R. Waichler
Subsurface simulation is used to build, test, and couple conceptual process models to better understand the persistence of uranium concentrations above federal drinking water standards in a 0.4 km by 1.0 km groundwater plume beneath the 300 Area of the U.S. Department of Energy's Hanford Site in eastern Washington State. At this location, the unconfined aquifer and the variably saturated l...... hiện toàn bộ
Geochemical and boron, strontium, and oxygen isotopic constraints on the origin of the salinity in groundwater from the Mediterranean Coast of Israel
Water Resources Research - Tập 35 Số 6 - Trang 1877-1894 - 1999
Avner Vengosh, Arthur J. Spivack, Yohanan Artzi, Avner Ayalon
In order to identify the origin of the salinity and formation of saline plumes in the central part of the Mediterranean coastal aquifer of Israel, we determined the elemental and boron, strontium, and oxygen isotopic compositions of fresh and brackish groundwater (Cl up to 1500 mg/L). We distinguish between two key anthropogenic sources: (1) sewage effluents used for irrigation with high N...... hiện toàn bộ
A continuous satellite‐derived global record of land surface evapotranspiration from 1983 to 2006
Water Resources Research - Tập 46 Số 9 - 2010
Ke Zhang, J. S. Kimball, Ramakrishna R. Nemani, Steven W. Running
We applied a satellite remote sensing–based evapotranspiration (ET) algorithm to assess global terrestrial ET from 1983 to 2006. The algorithm quantifies canopy transpiration and soil evaporation using a modified Penman‐Monteith approach with biome‐specific canopy conductance determined from the normalized difference vegetation index (NDVI) and quantifies open water evaporation using a Pri...... hiện toàn bộ
Inverse procedure for calibrating parameters that control land subsidence caused by subsurface fluid withdrawal: 1. Methods
Water Resources Research - Tập 44 Số 7 - 2008
Yi Liu, Donald C. Helm
Land subsidence prediction depends on a selected theoretical model and the calibration of its parameter values. An inverse model is developed that calibrates five parameters of a compacting confined aquifer system: K′v (vertical hydraulic conductivity of the aquitards), S′... hiện toàn bộ
Stochastic subsurface hydrology from theory to applications
Water Resources Research - Tập 22 Số 9S - 1986
Lynn W. Gelhar
Research on stochastic analysis of subsurface flow has developed rapidly in the last decade, but applications of this approach have been very limited. The purpose of this paper is to illustrate how currently available techniques and results can be used to answer important questions about the large‐scale behavior of naturally heterogeneous aquifers. Perturbation‐based spectral theory, which...... hiện toàn bộ
Quantifying regional scale ecosystem response to changes in precipitation: Not all rain is created equal
Water Resources Research - Tập 47 Số 10 - 2011
P. D. Brooks, P. A. Troch, M. Ďurčík, E. L. Gallo, Melissa E. Schlegel
Primary productivity and vegetation cover are strongly related to how precipitation is partitioned into surface discharge, storage, and evapotranspiration (ET). Thus, quantifying feedbacks between changes in precipitation and vegetation at regional scales is a critical step toward predicting both carbon balance and water resources as climate and land cover change. We used a catchment‐based...... hiện toàn bộ
Water balance variability at the interstorm timescale
Water Resources Research - Tập 43 Số 5 - 2007
Nicholas J. Potter, Lu Zhang
The translation of rainfall variability into variability in evapotranspiration, soil moisture, or runoff depends on many factors. Previously published results indicate that the sensitivity of evapotranspiration to rainfall at the interannual timescale generally increases as catchment aridity increases. This paper generalizes these results to the interstorm timescale by calculating the vari...... hiện toàn bộ
Climate and vegetation controls on the surface water balance: Synthesis of evapotranspiration measured across a global network of flux towers
Water Resources Research - Tập 48 Số 6 - 2012
C. A. Williams, Markus Reichstein, Nina Buchmann, Dennis Baldocchi, Christian Beer, Christopher R. Schwalm, Georg Wohlfahrt, Natalia Hasler, Christian Bernhofer, Thomas Foken, Dario Papale, Stanislaus J. Schymanski, Kevin Schaefer
The Budyko framework elegantly reduces the complex spatial patterns of actual evapotranspiration and runoff to a general function of two variables: mean annual precipitation (MAP) and net radiation. While the methodology has first‐order skill, departures from a globally averaged curve can be significant and may be usefully attributed to additional controls such as vegetation type. This pap...... hiện toàn bộ
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