Results 11 to 20 of about 5,645 (215)

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 ...
Timothy T. Pryshlak, Audrey H. Sawyer, Susa H. Stonedahl, Mohamad Reza Soltanian   +3 more
openaire   +3 more sources

Hyporheic exchange with heterogeneous streambeds: Laboratory experiments and modeling [PDF]

Water Resources Research, 2004
Hyporheic exchange is generally analyzed with the assumption of a homogeneous hyporheic zone. In reality, streambed sediments have a heterogeneous structure, and this natural heterogeneity produces spatially variable interfacial fluxes and complex hyporheic exchange patterns.
Mashfiqus Salehin, Aaron I. Packman, Matthew Paradis   +2 more
openaire   +3 more sources

Enhancement of Hyporheic Flow and Solute Transport by Random Burrow‐ and Mound‐Induced Bioturbation

Water Resources Research
Bioturbation significantly modifies sediment structure and surface roughness, thereby altering hyporheic exchange and associated biogeochemical processes.
Qihao Jiang, Jingsheng Jiang, Guangming Zhang, Jörg Lewandowski, Guangqiu Jin, Xinzhou Zhang, Jing Xu, Changchun Huang   +7 more
doaj   +2 more sources

Cold comfort for change: Stream mats as biological indicators of ecosystem processes in the McMurdo Dry Valleys, Antarctica. [PDF]

J Phycol
Abstract Glacier‐fed streams (GFSs) make ideal systems for studying climate‐related changes. Some of the best‐studied GFSs are found in the McMurdo Dry Valleys (MDVs) of Antarctica, one of the Earth's coldest and driest deserts. Despite their harsh and isolated nature, MDV GFSs represent an oasis of life in a landscape visually devoid of it, with ...
Kohler TJ, Hawes I, Howkins A, Zeglin LH, Gooseff MN, McKnight DM.   +5 more
europepmc   +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
openaire   +1 more source

Advances in the response of surface-subsurface water exchange to activities of typical aquatic organisms in the hyporheic zone of rivers

Shui kexue jinzhan, 2022
The river hyporheic zone is the main area of surface-subsurface connection and exchange. Surface-subsurface water exchange promotes the transport and transformation of biogenic substances and can conserve water resources, stabilize regional ecological ...
Guangqiu JIN, Zhongtian ZHANG, Haiyu YUAN, Hongwu TANG, Hexiang CHEN, Siyi ZHANG   +5 more
doaj   +1 more source

Advance in field monitoring research of hydrodynamic process of hyporheic exchange in rivers

Shui kexue jinzhan, 2021
The hyporheic zone is the key transition region between rivers and aquifers, which is highly dynamic and sensitive. Frequent water exchange can trigger the bio-geochemical reactions within the hyporheic zone easily, and consequently make a difference to ...
Yi CAI, Tao SHI, Junlan YAO, Shuguang LIU, Xike RUAN, Jia XU   +5 more
doaj   +1 more source

Deposition process and mechanism of colloidal particles in hyporheic zone

Shui kexue jinzhan, 2021
The hyporheic zone is a region where surface and subsurface water mix in rivers. It is an important area for the exchange of mass and energy and an essential habitat for aquatic organisms.
Zhongtian ZHANG, Guangqiu JIN, Hexiang CHEN, Hongwu TANG, Ling LI   +4 more
doaj   +1 more source

Revealing the influence of hyporheic water exchange on the composition and abundance of bottom-dwelling macroinvertebrates in a temperate lowland river

Knowledge and Management of Aquatic Ecosystems, 2021
We studied distributions and abundances of macroinvertebrates in relation to hyporheic water exchange (HWE) patterns of the upper Biebrza − a small, lowland, low dynamic European river located in Northeast Poland.
Grygoruk Mateusz, Szałkiewicz Ewelina, Grodzka-Łukaszewska Maria, Mirosław-Świątek Dorota, Oglęcki Paweł, Pusłowska-Tyszewska Dorota, Sinicyn Grzegorz, Okruszko Tomasz   +7 more
doaj   +1 more source

Hyporheic exchange due to channel‐spanning logs [PDF]

Water Resources Research, 2011
The flow of river water around large woody debris (LWD) creates pressure gradients along the riverbed that drive a large zone of river‐groundwater mixing, or hyporheic exchange. Flume experiments and numerical simulations show that river water downwells into the riverbed upstream of a channel‐spanning log and upwells downstream.
Audrey H. Sawyer, M. Bayani Cardenas, Jim Buttles   +2 more
openaire   +1 more source