Impacts of Streambed Heterogeneity and Anisotropy on Residence Time of Hyporheic Zone

Ground Water ◽  
2017 ◽  
Vol 56 (3) ◽  
pp. 425-436 ◽  
Author(s):  
Suning Liu ◽  
Ting Fong May Chui
Keyword(s):  
Residence Time ◽  
Hyporheic Zone ◽  
Streambed Heterogeneity

scholarly journals Does streambed heterogeneity matter for hyporheic residence time distribution in sand-bedded streams?

2016 ◽  
Vol 96 ◽  
pp. 120-126 ◽  
Author(s):  
Daniele Tonina ◽  
Felipe P.J. de Barros ◽  
Alessandra Marzadri ◽  
Alberto Bellin
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Streambed Heterogeneity

scholarly journals Dynamics of nitrate production and removal as a function of residence time in the hyporheic zone

2011 ◽  
Vol 116 (G1) ◽  
Author(s):  
Jay P. Zarnetske ◽  
Roy Haggerty ◽  
Steven M. Wondzell ◽  
Michelle A. Baker
Keyword(s):  
Residence Time ◽  
Hyporheic Zone ◽  
Nitrate Production

Modeling the influence of salmon spawning on hyporheic exchange of marine-derived nutrients in gravel stream beds

2015 ◽  
Vol 72 (8) ◽  
pp. 1146-1158 ◽  
Author(s):  
Todd H. Buxton ◽  
John M. Buffington ◽  
Daniele Tonina ◽  
Alexander K. Fremier ◽  
Elowyn M. Yager
Keyword(s):  
Residence Time ◽  
Hyporheic Zone ◽  
Hyporheic Exchange ◽  
Volume Flux ◽  
Hydraulic Residence Time ◽  
Bed Porosity ◽  
Stream Beds ◽  
The Mean ◽  
Stream Bed ◽  
Marine Derived Nutrients

Salmon that spawn in streams deliver marine-derived nutrients (MDN) that catalyze trophic productivity and support rearing juvenile salmon. Salmon spawning also affects hyporheic exchange and movement of dissolved MDN through the stream bed by creating redd topography that induces pumping exchange and by winnowing fine sediment and loosening the bed, which alters hydraulic conductivity and bed porosity. The spatial extent of spawning within the channel likely governs the volume and rate of dissolved MDN exchanged with the stream bed through this process. To explore this issue, we used a two-dimensional groundwater model to predict changes in hyporheic volume, flux, and mean hydraulic residence time of dissolved MDN as a function of the proportion of the bed surface occupied by redds (P). Predictions indicate that hyporheic volume and flux systematically increase with P, while the mean hydraulic residence time of dissolved MDN in the hyporheic zone decreases sharply with P, from 5.79 h on an unspawned bed (P = 0) to 0.03 h for a mass-spawned bed (P = 1.0). Shorter residence time results from hyporheic flux increasing faster than hyporheic volume with higher P. Implications for uptake of dissolved MDN are explored with Damköhler numbers, defined as the ratio of the mean hydraulic residence time to a biogeochemical rate of interest. Given the considerable influence of spawning on hyporheic exchange, additional research is needed to determine conditions under which bioassimilation of dissolved MDN is limited by nutrient supply, extent of the hyporheic zone, or processing rate of MDN in stream beds.

Residence time control on hot moments of net nitrate production and uptake in the hyporheic zone

2013 ◽  
Vol 28 (11) ◽  
pp. 3741-3751 ◽  
Author(s):  
Martin A. Briggs ◽  
Laura K. Lautz ◽  
Danielle K. Hare
Keyword(s):  
Residence Time ◽  
Hyporheic Zone ◽  
Time Control ◽  
Nitrate Production ◽  
Residence Time Control

Residence Time in Hyporheic Bioactive Layers Explains Nutrient Uptake in Streams

2021 ◽  
Author(s):  
Eugènia Martí ◽  
Angang Li ◽  
Susana Bernal ◽  
Brady Kohler ◽  
Steven A. Thomas ◽  
...  
Keyword(s):  
Nutrient Uptake ◽  
Water Column ◽  
Residence Time ◽  
Hyporheic Zone ◽  
Morphological Characteristics ◽  
Subsurface Water ◽  
Water Residence Time ◽  
Stream Channels ◽  
Nutrient Spiraling ◽  
Tracking Model

<p>Human activities negatively impact water quality by supplying excessive nutrients to streams. To investigate the capacity of streams to take up nutrients from the water column, we usually add nutrients to stream reaches, calculate the fraction of added nutrients that is taken up, and identify the environmental conditions controlling nutrient uptake. A common idea is that nutrient uptake increases with increasing water residence time because of increased contact time between solutes and organisms. Yet, water residence time only partially explains the temporal and spatial variability of nutrient uptake, and the reasons behind this variability are still not well understood. In this talk I’ll present a study which shows that good characterization of spatial heterogeneity of surface-subsurface flow paths and bioactive hot spots within streams is essential to understanding the mechanisms of in-stream nutrient uptake. The basis of this study arises from the use and interpretation of nutrient uptake results from the Tracer Additions for Spiraling Curve Characterization (TASCC) method. This model has been rapidly adopted to interpret in-stream nutrient spiraling metrics (e.g, nutrient uptake) over a range of concentrations from breakthrough curves (BTCs) obtained during pulse solute injection experiments. TASCC analyses often identify hysteresis in the relationship between spiraling metrics and concentration as nutrient concentration in BTCs rises and falls. The mechanisms behind these hysteresis patterns have yet to be determined. We hypothesized that difference in the time a solute is exposed to bioactive environments (i.e., biophysical opportunity) between the rising and falling limbs of BTCs causes hysteresis in TASCCs. We tested this hypothesis using nitrate empirical data from a solute addition combined with a process-based particle-tracking model representing travel times and transformations along each flow path in the water column and hyporheic zone, from which the bioactive zone comprised only a thin superficial layer. In-stream nitrate uptake was controlled by hyporheic exchange and the cumulative time nitrate spend in the bioactive layer. This bioactive residence time generally increased from the rising to the falling limb of the BTC, systematically generating hysteresis in the TASCC curves. Hysteresis decreased when nutrient uptake primarily occurred in the water column compared to the hyporheic zone, and with increasing the distance between the injection and sampling points. Hysteresis increased with the depth of the hyporheic bioactive layer. Our results indicate that the organisms responsible for nutrient uptake are confined within a thin layer in the stream sediments and that the bioactive residence time at the surface-subsurface water interface is important for nutrient uptake. I will end the talk illustrating how these findings can have important implications for in-stream nutrient uptake within the context of restoration practices addressed to modify the hydro-morphological characteristics of stream channels.</p>

Aspects of the hyporheic zone below the terminus of a South Australian arid-zone stream

1993 ◽  
Vol 44 (3) ◽  
pp. 411 ◽  
Author(s):  
MP Cooling ◽  
AJ Boulton
Keyword(s):  
Species Richness ◽  
Dissolved Oxygen ◽  
Residence Time ◽  
Hyporheic Zone ◽  
Arid Zone ◽  
South Australia ◽  
Common Species ◽  
Diel Variation ◽  
Assemblage Composition ◽  
Longitudinal Pattern

Diel variation in physicochemistry and assemblage composition of the hyporheos, below and beyond the terminus of an arid-zone intermittent stream, was studied in Brachina Creek, Flinders Ranges, South Australia. Surface water downwelled at the terminus, and physicochemical conditions in the hyporheic zone at 30 cm resembled those in the stream above. With increasing distance beyond the terminus and presumably greater hyporheic residence time, diel fluctuations in water temperature and dissolved oxygen became dampened, and were absent 80 m beyond the terminus. At least 31 taxa were collected, 19 of which were surface species temporarily occupying the hyporheic zone. These epigean taxa commonly occurred as tiny instars in the hyporheos below the stream in regions of strong downwelling. Further downstream, the hyporheos became dominated by phreatic species (e.g. blind amphipods, syncarids) that are obligate subsurface residents. At the most downstream site, where dissolved oxygen concentrations were lowest and water temperatures highest, species richness was least, although biomass (mainly amphipods) was greatest. There was no diel variation in assemblage composition, species richness, total abundance and biomass, or the abundance of common species at any of the sites below the stream. The longitudinal pattern in the spatial distribution of the hyporheos appeared to be related to stream hydrology (downwelling), bed permeability, and the hyporheic residence time of the water.

scholarly journals Analytical representations of the Residence Time Distribution (RTD) associated with Hyporheic Exchange beneath Dune-like bedforms at different sediment bed depths

2021 ◽  
Author(s):  
Ahmed Monofy ◽  
Fulvio Boano ◽  
Stanley Grant
Keyword(s):  
Residence Time ◽  
Time Distribution ◽  
Residence Time Distribution ◽  
Hyporheic Zone ◽  
Hyporheic Exchange ◽  
Mixing Processes ◽  
Sediment Bed ◽  
Distribution Parameters ◽  
Log Normal ◽  
High Degree

The hyporheic exchange below dune-shaped bedforms has a great impact on the stream environment. One of the most important properties of the hyporheic zone is the residence time distribution (RTD) of flow paths in the sediment domain. Here we evaluate the influence of an impervious layer, at a dimensionless sediment depth of d_b^*=(2πd_b)⁄λ where λ is the dune wavelength, on the form of the hyporheic exchange RTD. Empirical RTDs were generated, over a range of d_b^(* ) values, from numerical particle tracking experiments in which 10000 particles sinusoidally distributed over a flatbed domain were released. These empirical RTDs are best represented by the Gamma, Log-Normal and Fréchet distributions over normalized bed depth of 〖0 <=d〗_b^(* )≤1.2, 〖1.23.1, respectively. The depth dependence of the analytical distribution parameters is also presented, together with a set of regression formulae to predict these parameters based on d_b^(* )with a high degree of accuracy (R^2>99.8%). These results contribute to our understanding of the physical and mixing processes underpinning hyporheic exchange in streams and allow for a quick evaluation of its likely impact on nutrient and contaminant processing (e.g., based on the magnitude of the Damköhler number).

The Remarkable Generality of the Transient Storage Model with Residence Time Dependence: Temporal Moments.

2021 ◽  
Author(s):  
Mohammad Aghababaei ◽  
Timothy Ginn ◽  
Kenneth Carroll ◽  
Ricardo Gonzalez-Pinzon ◽  
Alex Tartakovsky
Keyword(s):  
Residence Time ◽  
Hyporheic Zone ◽  
Memory Function ◽  
Breakthrough Curves ◽  
Rate Coefficients ◽  
Transient Storage ◽  
Storage Model ◽  
Temporal Moments ◽  
River Corridor ◽  
Transient Storage Model

&lt;p&gt;Several distinct approaches to the one-dimensional modeling of river corridor transport at the macroscale have been developed as generalizations of the original Transient Storage Model (TSM).&amp;#160; We show that essentially all of them can be captured by simply restructuring the TSM so that the exchange coefficients are functions of residence time, because doing so converts the TSM to a general memory function form.&amp;#160; We use this generalized TSM approach to find novel closed-form expressions for the temporal moments of breakthrough curves resulting from river corridor tracer tests, when hyporheic zone exchange is governed by a memory function.&amp;#160; These expressions are useful because they can be used to test different hypotheses about the hyporheic zone residence time distribution based on analyses of the temporal moments of the tracer test breakthrough curves prior to detailed modeling work.&amp;#160; We demonstrate the application with a case study, and present extensions of the notion of making rate coefficients depend on residence time.&lt;/p&gt;

Sign in / Sign up

Export Citation Format

Share Document