Geostatistical interpolation of streambed hydrologic attributes with addition of left censored data and anisotropy

Mohamed, R. A. M.; Brooks, Scott C.; Tsai, Chia-Hsing; Ahmed, Tanzila; Rucker, Dale F.; Ulery, April; Pierce, Eric M.; Carroll, Kenneth C.

doi:10.1016/j.jhydrol.2021.126474

Cited by 10 publications

(9 citation statements)

References 69 publications

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“…In contrast, these correlation scales are much shorter than those found in lacustrine environments (Bissell & Aichele, 2004). Correlation scales of seepage flux have been infrequently studied and values range from little or no correlation (Kennedy et al., 2008) to 5.2–109.8 m (Mohamed et al., 2021).…”

Section: Discussionmentioning

confidence: 99%

Using Automated Seepage Meters to Quantify the Spatial Variability and Net Flux of Groundwater to a Stream

Humphrey

Solomon

Genereux

et al. 2022

Water Resources Research

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We utilized 251 measurements from a recently developed automated seepage meter (ASM) in streambeds in the Nebraska Sand Hills, USA to investigate the small‐scale spatial variability of groundwater seepage flux (q) and the ability of the ASM to estimate mean q at larger scales. Small‐scale spatial variability of q was analyzed in five dense arrays, each covering an area of 13.5–28.0 m2 (169 total point measurements). Streambed vertical hydraulic conductivity (K) was also measured. Results provided: (a) high‐resolution contour plots of q and K, (b) anisotropic semi‐variograms demonstrating greater correlation scales of q and K along the stream length than across the stream width, and (c) the number of rows of points (perpendicular to streamflow) needed to represent the groundwater flux of areas up to 28.0 m2. The findings suggest that representative streambed measurements are best conducted perpendicular to streamflow to accommodate larger seepage flux heterogeneity in this direction and minimize sampling redundancy. To investigate the ASM's ability to produce accurate mean q at larger scales, seepage meters were deployed in four stream reaches (170–890 m), arranged in three to six transects (three to eight points each) per reach across the channel. In each reach, the mean seepage flux from ASMs was compared to the seepage flux from bromide tracer dilution. Agreement between the two methods indicates the viability of a modest number of seepage meter measurements to determine the overall groundwater flux to the stream and can guide sampling for solutes and environmental tracers.

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Section: Discussionmentioning

confidence: 99%

Using Automated Seepage Meters to Quantify the Spatial Variability and Net Flux of Groundwater to a Stream

Humphrey

Solomon

Genereux

et al. 2022

Water Resources Research

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“…Bedrock outcrops are distributed intermittently along the entire length of the stream (Figure 1c), and the streambed is lined with fractured limestone bedrock that is covered by a thin veneer of porous alluvial sediments in some locations that is highly mobile in the stream (Rucker et al., 2021). SW‐GW exchanges between the stream and flood plain are thought to occur predominantly as lateral hyporheic exchange flow through the flood plain and along fracture planes through the limestone bedrock outcrops and streambed (Mohamed, Brooks, et al., 2021). Water‐level measurements in flood plain piezometers installed along the EFK5.4 reach in 2012 indicated that the stream was likely gaining at the time of measurement because water‐level altitudes measured in flood plain piezometers were slightly higher than the water‐level altitude in the stream such that the hydraulic gradient decreased toward the stream (Mohamed, Brooks, et al., 2021; Rucker et al., 2021).…”

Section: Site Descriptionmentioning

confidence: 99%

Geoelectric Characterization of Hyporheic Exchange Flow in the Bedrock‐Lined Streambed of East Fork Poplar Creek, Oak Ridge, Tennessee

Ikard

Carroll

Rucker

et al. 2023

Geophysical Research Letters

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“…Dominant vegetation along the stream in the study reach included deciduous trees typical of the area (dominantly sycamore, with some maple, and oak) and herbaceous understory. Many of the other characteristics and studies of the EFPC stream have been summarized elsewhere (Loar et al., 2011; Mohamed et al., 2021; Riscassi et al., 2016; Rucker et al., 2021).…”

Section: Field Site and Experimentsmentioning

confidence: 99%

Transient Storage Model Parameter Optimization Using the Simulated Annealing Method

Tsai

Rucker

Brooks

et al. 2022

Water Resources Research

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The hyporheic zone connects streams and rivers with groundwater, and it is recognized as critical for nutrient management and the proper functioning of stream ecosystems (Stegen et al., 2018), especially for slowly moving or small stream systems. Transport and transformation of many solutes, including nutrients, in stream corridors result from the interplay between biogeochemical processes and solute exchange between the stream channels and the metabolically active hyporheic zone (

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Geostatistical interpolation of streambed hydrologic attributes with addition of left censored data and anisotropy

Cited by 10 publications

References 69 publications

Using Automated Seepage Meters to Quantify the Spatial Variability and Net Flux of Groundwater to a Stream

Using Automated Seepage Meters to Quantify the Spatial Variability and Net Flux of Groundwater to a Stream

Geoelectric Characterization of Hyporheic Exchange Flow in the Bedrock‐Lined Streambed of East Fork Poplar Creek, Oak Ridge, Tennessee

Transient Storage Model Parameter Optimization Using the Simulated Annealing Method

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