Viewing river corridors through the lens of critical zone science

Wymore, Adam S.; Ward, Adam S.; Wohl, Ellen; Harvey, J. W.

doi:10.3389/frwa.2023.1147561

Cited by 8 publications

(3 citation statements)

References 382 publications

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“…This study was inspired by recent progress in modeling respiratory processes within hyporheic zones (HZ) and the common perspective that HZs are dominant control points with rivers 44,60,61 . While our study does not directly evaluate the biogeochemical contributions of HZs, we do provide evidence that the hydrologic processes that govern variation in predicted HZ respiration are not the same processes that govern ERtot and ERsed.…”

Section: Discussionmentioning

confidence: 99%

Sediment-associated processes drive spatial variation in ecosystem respiration in the Yakima River basin

Kaufman,

Garayburu-Caruso,

Forbes

et al. 2024

Preprint

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Areas where groundwater and surface water mix (i.e., hyporheic zones, HZ) contribute substantially to stream ecosystem respiration (ERtot). We rely on reactive transport models to understand HZ respiration at large scales; however, model outputs have not been evaluated with field estimates of ERtot. Here we evaluate the degree to which spatial variation in model-predicted HZ respiration can explain spatial variation in field-estimated ERtot across 32 sites in the Yakima River basin (YRB). We find that predicted HZ respiration did not explain spatial variation in ERtot. We hypothesize that ERtot is influenced by processes that integrate contributions from sediments, such as benthic algae, submerged macrophytes, and shallow HZ. Our results indicate that sediment-associated processes hydrologically connected to the active channel are primary drivers of spatial variation in ERtot in the YRB. We encourage conceptual and physical models of stream ERtot to integrate shallow hyporheic exchange with sediment associated primary production.

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Section: Discussionmentioning

confidence: 99%

Sediment-associated processes drive spatial variation in ecosystem respiration in the Yakima River basin

Kaufman,

Garayburu-Caruso,

Forbes

et al. 2024

Preprint

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“…The riverine landscape is the area occupied by the river corridor. Larger than the channel itself, it encompasses the terrain created by a river and its sediment load (e.g., Ward et al 2002;Wymore et al 2023). A primary component of a river corridor is the floodplain, which is the flat area adjacent to the channel constructed by the river under the present climate and is frequently subject to overflow (Leopold and Dunne 1978).…”

Section: Riverine Landscapesmentioning

confidence: 99%

A conceptual carbon budget for an icy riverine corridor

Anderson,

Cochran,

Anderson

et al. 2024

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The contribution of river corridors to the global carbon budget exceeds their small areal footprint, yet our understanding of fluvial carbon dynamics is incomplete, particularly in periglacial settings. Frequent disturbance and lateral fluxes are key attributes of carbon budgets in riparian corridors. Climate change affects the pace and style of fluvial and biogeochemical processes in periglacial settings. The effects of these can be assessed with a carbon budget, a statement of all fluxes in and out of a control volume, which we outline for a river corridor. We are generating data from a field campaign of the carbon stock in select river corridor segments of the Canning River, Alaska. This gravel-bedded river drains continuous permafrost from glaciated headwaters in the Brooks Range to its delta in the Beaufort Sea. Fluvial erosion and deposition generate distinct, mappable geomorphic surfaces in the river corridor that accumulate carbon over time. Carbon stocks on surfaces are summed across the river corridor to compute the total carbon stock. Characterizing the depth of alluvium is a poorly constrained component of the carbon stock. Lateral bank erosion hews away geomorphic surfaces, while sediment deposition buries carbon and generates new surfaces. Deposition of uprooted willows or turf mats augment the carbon stock and can jump-start plant succession. All fluxes in the carbon budget are sensitive to warming and arctic hydrologic intensification. Analyzing how these fluxes may change and affect the carbon stock in icy river corridors will advance our understanding of their contribution to the global carbon budget.

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“…In addition, agricultural land can severely affect the natural function of streams if not properly maintained. Agricultural activities can lead to significant changes in the structure of river corridors and the environmental functions that we all benefit from [13,14]. Working too close to a river corridor or changing the shape of the river can result in the removal of vegetation from riverbanks, floodplains, and uplands.…”

Section: Introductionmentioning

confidence: 99%

Integrating Earth Observation with Stream Health and Agricultural Activity

Chatzidavid,

Kokinou,

Kokolakis

et al. 2023

Remote Sensing

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The overall health of streams, including their surrounding urban or agricultural areas, is inextricably linked to general ecological balance and public health (physical and mental well-being). This study aims to contribute to the monitoring of rural or suburban areas adjacent to streams. Specifically, low-cost and rapid ground and Earth observation techniques were used to (a) obtain a rapid assessment of stream soil and water patterns, (b) create a database of selected parameters for the study area that can be used for future comparisons, and (c) identify soil variability in agricultural fields adjacent to streams and determine soil zones that will enable the rational use of inputs (water, fertilisers, and pesticides). Robust techniques from related fields of topography, geology, geophysics, and remote sensing were combined using GIS for two selected areas (I and II) in Heraklion, central Crete (Greece) in the eastern Mediterranean. Our results indicate that area I (east of Heraklion) is under pressure only in its coastal part, most probably due to urbanisation (land change). The agricultural fields of area II (west of Heraklion) show normal values for the distribution of electrical conductivity and magnetic susceptibility and present spatial variability indicating intra-parcel zones. Intra-parcel variability of the conductivity and magnetic susceptibility should be considered in future cropping and environmental management.

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Viewing river corridors through the lens of critical zone science

Cited by 8 publications

References 382 publications

Sediment-associated processes drive spatial variation in ecosystem respiration in the Yakima River basin

Sediment-associated processes drive spatial variation in ecosystem respiration in the Yakima River basin

A conceptual carbon budget for an icy riverine corridor

Integrating Earth Observation with Stream Health and Agricultural Activity

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