Browse Articles
Study of the Dilatancy/Contraction Mechanism of Landslide Fluidization Behavior Using an Initially Saturated Granular Column Collapse Simulation
-  23 September 2021
Key Points
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Numerical simulations were performed on the collapse of an initially saturated granular column
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Influences of initial solid volume fraction, aspect ratio and Stokes number on the collapse dynamics and associated deposits were clarified
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The differences in the results could be attributed to the dilatancy/contraction mechanism and related pore liquid pressure
Evaluation of Connectivity Characteristics on the Permeability of Two‐Dimensional Fracture Networks Using Geological Entropy
-  17 September 2021
Key Points
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The entropic scale as informative index of spatial disorder of fracture networks is applied
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The relationships between permeability, geological entropy, and structure of fracture networks are presented
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An empirical quadratic polynomial model between the permeability and entropic scale is developed
Experimental and Numerical Study of the Effect of Model Geometric Distortion on Laboratory Modeling of Urban Flooding
-  16 September 2021
Key Points
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We evaluated the possible bias induced by geometric distortion in the case of laboratory-scale modeling of urban flooding
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In all the tests, this bias reached up to 17% for the upscaled flow depths and 24 percentage points for the outlet discharge partition
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For distortion ratios up to 5, this bias varies greatly, but it stabilizes asymptotically for larger distortion ratios
Field‐Scale Subsurface Flow Processes Inferred From Continuous Gravity Monitoring During a Sprinkling Experiment
-  16 September 2021
Key Points
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Non-invasive monitoring of laterally limited water mass redistribution in the subsurface using a superconducting gravimeter
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Identification of dominant subsurface flow processes with a simple hydro-gravimetric inversion model
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Multi-criteria evaluation of modeled scenarios with gravity, soil moisture and electrical resistivity
Effects of Dissolution Fingering on Mass Transfer Rate in Three‐Dimensional Porous Media
-  14 September 2021
Key Points
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We present the first three-dimensional observation of dissolution fingering with simultaneous observations in pore-scale and meso-scale
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Dissolution fingers effect to mass transfer occurs when the dissolution finger size is larger than the container of the porous media
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Dissolution fingering decreases mass transfer coefficient down to one-third
Laboratory Flume and Numerical Modeling Experiments Show Log Jams and Branching Channels Increase Hyporheic Exchange
-  13 September 2021
Key Points
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Logjams increase stream-groundwater connectivity by increasing hyporheic exchange rates and to a lesser degree, inundated area
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The range of hyporheic flow lengths and residence times increases with jam size and channel complexity
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Jams facilitate more chemical processing in the hyporheic zone, especially at lower stream flows
Stochastic Rainwater Harvesting System Modeling Under Random Rainfall Features and Variable Water Demands
-  12 September 2021
Key Points
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Accurate & simple models to simulate, design, assess, and analyze rainwater harvesting systems under random rainfalls and variable water demands
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Insignificant changes of water-supply reliability of the systems with removing synchronic changes or high extremes of rainfall features
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Long dry periods are lengthened by climate change, and dominate low, spatially heterogeneous reliability of the systems in Toronto, Canada
Potential Drought Mitigation Through Microbial Induced Calcite Precipitation‐MICP
-  10 September 2021
A Comparison of Time‐Frequency Signal Processing Methods for Identifying Non‐Perennial Streamflow Events From Streambed Surface Temperature Time Series
-  9 September 2021
Key Points
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Short streamflow events successfully identified from streambed surface temperature data using six time-frequency signal processing methods
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Synthetic and field data analyses showed variations between the performance of six time-frequency methods and the moving standard deviation
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In our case study, the continuous wavelet transform was the most efficacious and most parsimonious method of identifying streamflow
A proposed multi‐objective, multi‐stage stochastic programming with recourse model for reservoir management and operation
-  30 September 2021
Key Points
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Presents a multi-objective, multi-stage stochastic programming with recourse model for reservoir operations
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Develops a linear spline utility function for selecting the most preferred solution on the Pareto front
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Evaluates the performance of the proposed optimization framework with a real-world case study
Groundwater‐mediated memory of past climate controls water yield in snowmelt‐dominated catchments
-  30 September 2021
Key Points
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Spatially coherent temporal patterns in winter discharge indicates quasi-decadal periodicity in groundwater storage in headwater catchments
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This variability in antecedent catchment water storage is the primary determinant of water yield during the subsequent spring snowmelt
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Variability in mid-winter baseflow allows water managers to anticipate and plan for the upcoming runoff season months before melt begins
River corridor model constrained by time‐lapse seismic acquisition
-  29 September 2021
Key Points
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Mapping hydrofacies, expanding the modeling domain and building stronger model constraints in space and time by using a multimethod approach
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Capturing the local spatial and temporal dynamic of the water table with high resolution time-lapse seismic acquisitions
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Using the water table geometry dynamics to calibrate and perform fully integrated 2D river corridor modeling
On River‐Aquifer Exchange Flow with Irregular and Semipervious Bank
-  29 September 2021
Key Points
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New mathematical model and semi-analytical solution are developed for bank storage exchange flow with irregular and semipervious banks
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An innovative dimensionless number (river bank index) is proposed to quantify the influence of bank irregularity
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Over-simplified approximations of irregular bank geometry may result in non-negligible estimation errors
HUP‐BMA: An Integration of Hydrologic Uncertainty Processor and Bayesian Model Averaging for Streamflow Forecasting
-  29 September 2021
Key Points
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Hydrologic Uncertainty Processor and Bayesian Model Averaging are integrated for enhanced hydrologic uncertainty quantification
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The proposed method compensates for the dependence of the Hydrologic Uncertainty Processor method on a deterministic hydrologic model
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The modified formulation of the method unconditioned on initial observation leads to better streamflow forecasts for longer lead-times
Spatial and Temporal Variability in Concentration‐Discharge Relationships at the Event Scale
-  29 September 2021
Key Points
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We compare event-scale and inter-annual concentration-discharge relationships in four adjoined catchments with contrasting land use
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The variability of event-scale C-Q relationships was shaped by land use and antecedent conditions for reactive but not for geogenic solutes
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For biogeochemically reactive solutes, event-scale C-Q patterns can contrast the inter-annual pattern obtained from all observations
Review of data science trends and issues in porous media research with a focus on image–based techniques
-  28 September 2021
Key Points
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The porous material data-science concepts are portrayed and categorized into six subdomains
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Image-based deep learning is becoming a unique tool to characterise, simulate and classify porous materials
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Machine learning in porous material research studies is still dominated by MATLAB, however, Python developments are becoming a trend
New Structural Percolation Transition in Fractional Wet 3D‐Porous Media: A comparative µ‐CT Study
-  28 September 2021
Key Points
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Fractional wet glass beads and sands with same morphological properties (pore space connectivity) show an opposite trapping behavior
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Pure hydrophobic sands and glass beads show equal trapping efficiency caused by bypass trapping (equal pore space connectivity)
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Structural (site) percolation transition with a percolation threshold of approximately 50% hydrophobic glass beads
Nitrate transport and retention in Western European catchments are shaped by hydroclimate and subsurface properties
-  27 September 2021
Key Points
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Time lags of nitrogen transport in Western European catchments were five years on average and varied in space with hydroclimatic conditions
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Large parts of the diffuse N input was retained in the catchments with differences explained by subsurface properties and specific discharge
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Biogeochemical legacy likely exceeded hydrologic legacy in most of the 238 analyzed catchments
Changing Water Resources under El Niño, Climate Change and Growing Water Demands in Seasonally‐dry Tropical Watersheds
-  25 September 2021
Key Points
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Watershed-based analysis of climate change and water demand impacts on streamflow and groundwater in wet-dry tropics of Central America
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El Niño and climate change may substantially impact streamflow and groundwater recharge, especially with high population growth
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Reductions in domestic water demand may be able to slow down, or reverse, groundwater storage declines
A new model for predicting the hydraulic conductivity of unsaturated porous media
- Water Resources Research
-  513-522
-  June 1976
Evaluating the use of “goodness‐of‐fit” Measures in hydrologic and hydroclimatic model validation
- Water Resources Research
-  233-241
-  1 January 1999
Electromagnetic determination of soil water content: Measurements in coaxial transmission lines
- Water Resources Research
-  574-582
-  June 1980
Response of mean annual evapotranspiration to vegetation changes at catchment scale
- Water Resources Research
-  701-708
-  1 March 2001
Validity of Cubic Law for fluid flow in a deformable rock fracture
- Water Resources Research
-  1016-1024
-  December 1980
Effective and efficient global optimization for conceptual rainfall‐runoff models
- Water Resources Research
-  1015-1031
-  April 1992
Techniques of trend analysis for monthly water quality data
- Water Resources Research
-  107-121
-  February 1982
The Millennium Drought in southeast Australia (2001–2009): Natural and human causes and implications for water resources, ecosystems, economy, and society
- Water Resources Research
-  1040-1057
-  6 February 2013
Key Points
- Drivers and impacts of Australia's record drought were analyzed
- Impacts accumulated and propagated through the water cycle at different rates
- Future droughts may not be managed better than past ones.
Developing joint probability distributions of soil water retention characteristics
- Water Resources Research
-  755-769
-  May 1988
The WFDEI meteorological forcing data set: WATCH Forcing Data methodology applied to ERA‐Interim reanalysis data
- Water Resources Research
-  7505-7514
-  19 August 2014
Key Points
- Global three hourly meteorological forcing data at half-degree spatial resolution
- Covers 1979–2012
- Improvements compared to the WATCH forcing data
Water management: Current and future challenges and research directions
- Water Resources Research
-  4823-4839
-  20 June 2015
Methods and technologies to improve efficiency of water use
- Water Resources Research
-  29 July 2008
The Millennium Drought in southeast Australia (2001–2009): Natural and human causes and implications for water resources, ecosystems, economy, and society
- Water Resources Research
-  1040-1057
-  6 February 2013
Key Points
- Drivers and impacts of Australia's record drought were analyzed
- Impacts accumulated and propagated through the water cycle at different rates
- Future droughts may not be managed better than past ones.
A multiresolution index of valley bottom flatness for mapping depositional areas
- Water Resources Research
-  16 December 2003
Satellite Remote Sensing for Water Resources Management: Potential for Supporting Sustainable Development in Data‐Poor Regions
- Water Resources Research
-  9724-9758
-  29 October 2018
Key Points
- Satellite remote sensing is being incorporated into water resources management but is generally underutilized
- New and proposed missions have the potential to transform water resources management for sustainable development, especially in data-poor regions
- Ongoing challenges of accuracy, sampling, and continuity and capacity development need to be addressed, as well as new challenges of information volume and diversity
The science and practice of river restoration
- Water Resources Research
-  5974-5997
-  24 July 2015
Key Points
- River restoration is a prominent area of applied water-resources science
- restoration includes connectivity, physical-biotic interactions, and history
- effective restoration requires collaboration among scientists and practitioners
The twenty‐first century Colorado River hot drought and implications for the future
- Water Resources Research
-  2404-2418
-  17 February 2017
Key Points
- Record Colorado River flow reductions averaged 19.3% per year during 2000–2014. One-third or more of the decline was likely due to warming
- Unabated greenhouse gas emissions will lead to continued substantial warming, translating to twenty-first century flow reductions of 35% or more
- More precipitation can reduce the flow loss, but lack of increase to date and large megadrought threat, reinforce risk of large flow loss
Plain Language Summary
Between 2000 and 2014, annual Colorado River flows averaged 19% below the 1906–1999 average, the worst 15-year drought on record. Approximately one-third of the flow loss is due to high temperatures now common in the basin, a result of human caused climate change. Previous comparable droughts were caused by a lack of precipitation, not high temperatures. As temperatures increase in the 21st century due to continued human emissions of greenhouse gasses, additional temperature-induced flow losses will occur. These losses may exceed 20% at mid-century and 35% at end-century. Additional precipitation may reduce these temperature-induced losses somewhat, but to date no precipitation increases have been noted and climate models do not agree that such increases will occur. These results suggest that future climate change impacts on the Colorado River will be greater than currently assumed. Reductions in greenhouse gas emissions will lead to lower future temperatures and hence less flow loss.
Quantifying renewable groundwater stress with GRACE
- Water Resources Research
-  5217-5238
-  16 June 2015
Key Points:
- Renewable groundwater stress is quantified in the world's largest aquifers
- Characteristic stress regimes are defined to determine the severity of stress
- Overstressed aquifers are mainly in rangeland biomes with some croplands
Optimizing multiple dam removals under multiple objectives: Linking tributary habitat and the Lake Erie ecosystem
- Water Resources Research
-  23 December 2009
A Transdisciplinary Review of Deep Learning Research and Its Relevance for Water Resources Scientists
- Water Resources Research
-  8558-8593
-  30 August 2018
Key Points
- Deep learning (DL) is transforming many scientific disciplines, but its adoption in hydrology is gradual
- DL can help tackle interdisciplinarity, data deluge, unrecognized linkages, and long-standing challenges such as scaling and equifinality
- The new field of AI neuroscience opens up many opportunities for scientists to use DL as an exploratory tool for scientific advancement