Filtering by Subject: Hydrology

Geochemical signatures of rare earth elements and yttrium in the vicinity of an ion-adsorption type deposit: roles of source sediment control

Haiyan Liu, Huaming Guo, Olivier Pourret, Maohan Liu, Zhen Wang, Weimin Zhang, Zebing Li, Bai Gao, Zhanxue Sun, Pierre Laine

Published: 2021-05-13
Subjects: Biogeochemistry, Geochemistry, Geology, Hydrology

The elevated concentrations of rare earth elements (REE) and yttrium (REE+Y) in acid mine drainage (AMD) constitute an opportunity for REE+Y recovery. However, the source and control of REE+Y signatures in AMD remains uncertain. Water, rock, sediment and sludge samples were collected from an ion-adsorption rare earth mining area to investigate REE+Y concentration and fractionation patterns in [...]

Advancing floating macroplastic detection from space using hyperspectral imagery

Paolo Tasseron, Tim van Emmerik, Joseph Peller, Louise Schreyers, Lauren Biermann

Published: 2021-05-13
Subjects: Environmental Sciences, Hydrology, Other Environmental Sciences

Airborne and spaceborne remote sensing (RS) collecting hyperspectral imagery provides unprecedented opportunities for the detection and monitoring of floating riverine and marine plastic debris. However, a major challenge in the application of RS techniques is the lack of fundamental understanding of spectral signatures of water-borne plastic debris. Recent work has emphasised the case for [...]

What you net depends on if you grab: A meta-analysis of sampling method's impact on measured aquatic microplastic concentration

Lisa Watkins, Patrick J. Sullivan, M. Todd Walter

Published: 2021-05-08
Subjects: Design of Experiments and Sample Surveys, Environmental Monitoring, Fresh Water Studies, Hydrology, Other Environmental Sciences

Microplastic pollution is measured with a variety of sampling methods. Field experiments indicate that commonly used sampling methods, including net, pump and grab samples, do not always result in equivalent measured concentration. We investigate the comparability of these methods through a meta-analysis of over one hundred surface water microplastic studies. We find systematic relationships [...]

Advancing river corridor science beyond disciplinary boundaries with an inductive approach to hypothesis generation

Adam Scott Ward, Jennifer Drummond, Angang Li, Anna Lupon, Marie Kurz, Jay Zarnetske, James Stegen, Eugenia Marti, Valerie Ouellet, Nicolai Brekenfeld, Feng Mao, Emily Graham, Susana Bernal, Stefan Krause, David Hannah, Aaron Packman, Todd Royer, Megan Klaar

Published: 2021-05-08
Subjects: Hydrology

Traditional, deductive approaches have generated a large body of site-, scale-, process-, or method-specific understanding of the physical, chemical, and biological processes that occur within river corridors. However, this body of facts does not until itself constitute a predictive understanding of river corridors in their full complexity. We contend a new paradigm is required to synthesize [...]

Release timing and duration control the fate of photolytic compounds in stream-hyporheic systems

Jase Hixson, Adam Scott Ward, Christina Remucal, Megan McConville

Published: 2021-04-22
Subjects: Earth Sciences, Environmental Sciences, Hydrology, Water Resource Management

Predicting environmental fate requires an understanding of the underlying, spatiotemporally variable interaction of transport and transformation processes. Photolytic compounds, for example, interact with both time-variable photolysis and the perennially dark hyporheic zone, generating potentially unexpected dynamics that arise from time-variable reactivity. This interaction has been found to [...]

A Hydrologist’s Guide to Open Science

Caitlyn A Hall, Sheila M. Saia, Andrea Popp, Nilay Dogulu, Stan Schymanski, Niels Drost, Tim van Emmerik, Rolf Hut

Published: 2021-04-22
Subjects: Climate, Earth Sciences, Environmental Sciences, Hydrology, Water Resource Management

Hydrologic research that is open, accessible, reusable, and reproducible will have the largest impact on the scientific community and broader society. While more and more members of the hydrology community and key hydrology organizations are embracing open science practices, technical (e.g., limited coding experience), resource (e.g., open access fees), and social (e.g., fear of being scooped) [...]

Transmissivity and groundwater flow exert a strong influence on drainage density

Elco Luijendijk

Published: 2021-04-07
Subjects: Geomorphology, Hydrology

The extent to which groundwater flow affects drainage density and erosion has long been debated, but is still uncertain. Here, I present a new hybrid analytical and numerical model that simulates groundwater flow, overland flow, hillslope erosion and stream incision. The model is used to explore the relation between groundwater flow and the incision and persistence of streams for a set of [...]

A quantitative history of the U.S. Clean Water Act’s jurisdiction

Riley Walsh, Adam Scott Ward

Published: 2021-04-02
Subjects: Earth Sciences, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Water Resource Management

The Clean Water Act (CWA) is the primary federal mechanism by which the physical, chemical, and biological integrity of streams, lakes, and wetlands are protected in the U.S. The CWA has evolved considerably since its initial passage in 1948, including explicit expansions and contractions of jurisdictional scope through a series of legislative actions, court decisions, and agency rules. Here, we [...]

A Regional Semi-Distributed Streamflow Model Using Deep Learning

Zhongrun Xiang, Ibrahim Demir, Ricardo Mantilla, Witold F. Krajewski

Published: 2021-03-08
Subjects: Civil and Environmental Engineering, Engineering, Environmental Studies, Hydrology

Recent studies have shown that deep learning models in hydrological applications significantly improved streamflow predictions at multiple stations compared to traditional machine learning approaches. However, most studies lack generalization; i.e. researchers are training separate models for each location. The spatial and temporal generalization ability of deep learning models in hydrology that [...]

New insight into post-seismic landslide evolution processes in the tropics

Hakan Tanyas, Dalia Kirschbaum, Tolga Gorum, Cees J. van Westen, Luigi Lombardo

Published: 2021-03-04
Subjects: Earth Sciences, Geomorphology, Geophysics and Seismology, Hydrology

Earthquakes do not only trigger landslides in co-seismic phases but also elevate post-seismic landslide susceptibility either by causing a strength reduction in hillslope materials or by producing co-seismic landslide deposits, which are prone to further remobilization under the external forces generated by subsequent rainfall events. However, we still have limited observations regarding the [...]

Crisis at the Salton Sea: Research Gaps and Opportunities

Marilyn Fogel, Hoori Ajami, Emma Aronson, Roya Bahreini, Wilfred Elders, Darrel Jenerette, David Lo, Timothy Lyons, Michael McKibben, William Porter, Arun Raju, Kurt Schwabe, Caroline Hung, Jonathan Nye

Published: 2021-03-03
Subjects: Atmospheric Sciences, Biogeochemistry, Chemistry, Climate, Earth Sciences, Environmental Chemistry, Environmental Public Health, Environmental Sciences, Environmental Studies, Geochemistry, Geology, Geomorphology, Hydrology, Medicine and Health Sciences, Oceanography and Atmospheric Sciences and Meteorology, Physical Sciences and Mathematics, Public Health, Social and Behavioral Sciences

The Salton Sea, a hypersaline lake in southern California, USA, is in crisis. A combination of mismanagement and competition between federal, state and local agencies has resulted in stalled efforts to address dropping water levels and unstable lake biogeochemistry. This in turn has led to a growing public health crisis as exposed shoreline exposes potentially toxic dust to local and regional [...]

Hydro-Meteorological Aspects of the 2021 South Kalimantan Flood: Topography, Tides, and Precipitation

Munawir Bintang Pratama, Rafida Multazima Withono, Ismail Naufal Azkiarizqi

Published: 2021-03-01
Subjects: Earth Sciences, Hydrology, Meteorology

The 2021 South Kalimantan Flood is said to be the greatest flood ever take place in the province. This study aims to provide an overview of the disaster and assisting future research. Hydro-meteorological conditions such as topography, tides, and precipitation are described. Between January 10 – 19, extreme rain events occurred in South Kalimantan, a province dominated by low lying land with [...]

An uncertainty-focused database approach to extract spatiotemporal trends from qualitative and discontinuous lake-status histories

Gijs De Cort, Manuel Chevalier, Sallie L. Burrough, Christine Y. Chen, Sandy P. Harrison

Published: 2021-03-01
Subjects: Climate, Earth Sciences, Geology, Geomorphology, Hydrology, Longitudinal Data Analysis and Time Series, Other Earth Sciences, Sedimentology, Statistical Methodology, Stratigraphy

Changes in lake status are often interpreted as palaeoclimate indicators due to their dependence on precipitation and evaporation. The Global Lake Status Database (GLSDB) has since long provided a standardised synopsis of qualitative lake status over the last 30,000 14C years. Potential sources of uncertainty however are not recorded in the GLSDB. Here we present an updated and improved [...]

Simulating fully-integrated hydrological dynamics in complex Alpine headwaters

James Matthew Thornton, René Therrien, Grégoire Mariéthoz, Niklas Linde, Philip Brunner

Published: 2021-02-26
Subjects: Hydrology

Hydrological climate change impact assessments in mountainous areas still frequently rely upon highly simplified approaches. Fully-integrated surface-subsurface codes would appear to hold far greater potential to represent the distinctive regimes of steep, geologically complex headwaters. However, their application in mountainous terrain has thus far been predominantly limited to crystalline [...]

Global climate-driven trade-offs between the water retention and cooling benefits of urban greening

Mark Cuthbert, Gabriel Rau, Adam Bates, Marie Ekstrom, Denis O'Carroll

Published: 2021-02-23
Subjects: Civil and Environmental Engineering, Construction Engineering and Management, Earth Sciences, Engineering, Environmental Engineering, Environmental Health and Protection, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Sustainability, Water Resource Management

Heat-related mortality and flooding are pressing challenges for the >4 billion urban population worldwide, exacerbated by increasing urbanization and climate change. Urban greening, such as green roofs and parks, can potentially help address both problems, but the geographical variation of the relative hydrological and thermal performance benefits of such interventions are unknown. Here we [...]


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