Results 1 to 10 of about 1,377 (163)
Gravity‐driven water exchange between streams and hyporheic zones [PDF]
Geophysical Research Letters, 2009 The exchange of water and nutrients between rivers and hyporheic zones has been recognized as a very important process for the stream ecosystem. This water exchange is generally explained by pressure gradients on the riverbed that are induced by fluvial geomorphological features or by turbulent coherent structures.
Fulvio Boano +2 more
exaly +4 more sources
Hyporheic hydraulic geometry: Conceptualizing relationships among hyporheic exchange, storage, and water age [PDF]
PLOS ONE, 2022 Hyporheic exchange is now widely acknowledged as a key driver of ecosystem processes in many streams. Yet stream ecologists have been slow to adopt nuanced hydrologic frameworks developed and applied by engineers and hydrologists to describe the relationship between water storage, water age, and water balance in finite hydrosystems such as hyporheic ...
Geoffrey C. Poole +7 more
openaire +5 more sources
The Effect of Stream Discharge on Hyporheic Exchange [PDF]
Water, 2019 Streambed morphology, streamflow dynamics, and the heterogeneity of streambed sediments critically controls the interaction between surface water and groundwater. The present study investigated the impact of different flow regimes on hyporheic exchange in a boreal stream in northern Sweden using experimental and numerical approaches.
Brian Babak Mojarrad +4 more
core +6 more sources
Hyporheic exchange due to in-stream geomorphic structures [PDF]
Journal of Freshwater Ecology, 2022 In-stream structures, such as channel spanning logs and weirs, can enhance hyporheic exchange in streams. Hyporheic exchange is important for stream ecosystem function, and restoring this function is a goal of many stream restoration projects. However, studies on the connection between in-stream structure size, hydrogeologic setting, and hyporheic ...
Jinghong Feng
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Dynamic Hyporheic Zones: Exploring the Role of Peak Flow Events on Bedform‐Induced Hyporheic Exchange [PDF]
Water Resources Research, 2019 AbstractDischarge varies in space and time, driving hyporheic exchange processes in river corridors that affect biogeochemical cycling and ultimately control the dynamics of biogeochemical hot spots and hot moments. Herein, we use a reduced‐order model to conduct the systematic analysis of the interplay between discharge variability (peak flow ...
Singh, Tanu +5 more
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In‐stream geomorphic structures as drivers of hyporheic exchange [PDF]
Water Resources Research, 2008 Common in‐stream geomorphic structures such as debris dams and steps can drive hyporheic exchange in streams. Exchange is important for ecological stream function, and restoring function is a goal of many stream restoration projects, yet the connection between in‐stream geomorphic form, hydrogeologic setting, and hyporheic exchange remains inadequately
Erich T Hester, Martin W Doyle
exaly +2 more sources
Multiscale hyporheic exchange through strongly heterogeneous sediments [PDF]
Water Resources Research, 2015 AbstractHeterogeneity in hydraulic conductivity (K) and channel morphology both control surface water‐groundwater exchange (hyporheic exchange), which influences stream ecosystem processes and biogeochemical cycles. Here we show that heterogeneity in K is the dominant control on exchange rates, residence times, and patterns in hyporheic zones with ...
Audrey H Sawyer +2 more
exaly +2 more sources
Impacts of Emergent Vegetation on Hyporheic Exchange
Geophysical Research Letters, 2022 AbstractHyporheic exchange, or the exchange of water and solutes between surface and subsurface water at the sediment‐water interface, regulates water quality and biogeochemical cycle in aquatic ecosystems. Vegetation, which is ubiquitous in nature, is known to impact hyporheic exchange; yet how vegetation impacts hyporheic exchange remains to be ...
S. Huang, J. Q. Yang
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ANALYSIS OF THE INFLUENCE OF FERRICRETE ON HYPORHEIC EXCHANGE FLOWS [PDF]
Geological Society of America Abstracts with Programs, 2020 The area of confluence between surface water and groundwater, known as the hyporheic zone, is a natural biogeochemical filter that is dependent on channel morphology and hydraulic conductivity, pressure-driven downwelling and upwelling currents, and stream discharge.
Ariel Rickel +3 more
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Hyporheic exchange mechanism driven by flood wave [PDF]
Hydrological Processes, 2020 AbstractTo study the hyporheic exchange driven by a single peak flood‐induced water level fluctuation (i.e., flood wave), a method combining numerical simulation with theoretical derivation was proposed based on the Inbuk Stream, Korea, where flooding occurs frequently.
Dongsheng Liu +4 more
openaire +1 more source