Heat tracing to determine spatial patterns of hyporheic exchange across a river transect

Lu, Chengpeng; Chen, Shuai; Zhang, Ying; Su, Xiaoru; Chen, Guohao

doi:10.1007/s10040-017-1553-9

Cited by 13 publications

(13 citation statements)

References 57 publications

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“…A temperature probe (Figure 1b), which was equipped with thermistors on the metal tube, was inserted into the riffle downstream of the channel where no bridges or sharp bends were located, to measure the temperature of sediment at five different depths (0.0, 0.1, 0.2, 0.3, and 0.45 m) and hence, the temperature gradients were used to identify the patterns of hyporheic exchange [43]. Temperature measurements were recorded every 24 seconds by the data logger for approximately 30 min [44].…”

Section: Hyporheic Exchange Determinationmentioning

confidence: 99%

Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

Lin

Song

Gualtieri

et al. 2020

Water

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The effect of hyporheic exchange on macroinvertebrates is a significant topic in ecohydraulics. A field study was conducted during May and June 2017 to investigate the impacts of magnitude and patterns of hyporheic exchange on the sediment macroinvertebrate community in the Weihe River basin. The results demonstrate that upwelling flows cause resuspension of riverbed sediment, increasing the proportion of swimmer groups (such as Baetidae) in the macroinvertebrate community. However, large resuspension of river bed sediment results in a reduced abundance of macroinvertebrates. By controlling the transport processes of dissolved oxygen (DO), dissolved organic carbon (DOC), nutrients, temperature, and different patterns of hyporheic exchange strongly influence the structure of macroinvertebrate communities. Downwelling is more likely to produce rich invertebrate communities than upwelling. The magnitude for the hyporheic flux of 150-200 mm/d was optimal for the macroinvertebrate community in the Weihe River Basin. Above or below this rate results in a decline in community abundance and diversity. We suggest that research is conducted to better understand the effects of hyporheic exchange across bedforms on macroinvertebrate communities. The study supports any activities to preserve the ecological functions and health of rivers dominated by fine-grained sediments.

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Section: Hyporheic Exchange Determinationmentioning

confidence: 99%

Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

Lin

Song

Gualtieri

et al. 2020

Water

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“…Thermal parameters are considered constant in spatial and temporal distribution because of the relatively thermal homogeneity of streambed sediment. The values are determined through field observation, referring to several published studies [38,63,64].…”

Section: Analysis Methods Of Vertical Hyporheic Fluxmentioning

confidence: 99%

Field Experiments of Hyporheic Flow Affected by a Clay Lens

Yao

Wei

et al. 2019

Water

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As a typical water exchange of surface water and groundwater, hyporheic flow widely exists in streambeds and is significantly affected by the characteristics of sediment and surface water. In this study, a low-permeability clay lens was chosen to investigate the influence of the streambed heterogeneity on the hyporheic flow at a river section of the Xin'an River in Anhui Province, China. A 2D sand tank was constructed to simulate the natural streambed including a clay lens under different velocity of surface water velocity. Heat tracing was used in this study. In particular, six analytical solutions based on the amplitude ratio and phase shift of temperatures were applied to calculate the vertical hyporheic flux. The results of the six methods ranged from −102.4 to 137.5 m/day and showed significant spatial differences. In view of the robustness of the calculations and the rationality of the results, the amplitude ratio method was much better than the phase shift method. The existence of the clay lens had a significant influence on the hyporheic flow. Results shows that the vertical hyporheic flux in the model containing a clay lens was lower than that for the blank control, and the discrepancy of the hyporheic flow field on both sides of the lens was obvious. Several abnormal flow velocity zones appeared around the clay lens where the local hyporheic flow was suppressed or generally enhanced. The hyporheic flow fields at three test points had mild changes when the lens was placed in a shallow layer of the model, indicating that the surface water velocity only affect the hyporheic flow slightly. With the increasing depth of the clay lens, the patterns of the hyporheic flow fields at all test points were very close to those of the hyporheic flow field without a clay lens, indicating that the influence of surface water velocity on hyporheic flow appeared gradually. A probable maximum depth of the clay lens was 30 to 40 cm, which approached the bottom of the model and a clay lens buried lower than this maximum would not affect the hyporheic flow any more. Influenced by the clay lens, hyporheic flow was hindered or enhanced in different regions of streambed, which was also depended on the depth of lens and surface water velocity. Introducing a two-dimensional sand tank model in a field test is an attempt to simulate a natural streambed and may positively influence research on hyporheic flow.

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“…Schulz () compared fluxes estimated from Darcy calculations, multisensory temperature profiling and SBPVP, and found the temperature methods to produce estimates approaching a factor of 10 lower than the other methods—though variability in the Darcy calculations was highly dependent on the method used to estimate hydraulic conductivity. Although temperature‐based methods rely on a contrast between the temperature of groundwater and the temperature of surface water, which can vary seasonally (Krause and Blume ; Rose et al ), they have been shown to effectively quantify and delineate exchange zones in field studies (Westhoff et al ; Lu et al ).…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Tools and Methods for Estimating Groundwater‐Surface Water Exchange

Cremeans¹,

Devlin²,

Osorno³

et al. 2020

Groundwater Monitoring Rem

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A comparison of tools for measuring discharge rates in a sandy streambed was conducted along a transect near the north bank of the Grindsted Å (stream), Denmark. Four tools were evaluated at six locations spaced 3 m apart in the stream: mini‐piezometers, streambed point velocity probes (SBPVPs), temperature profilers, and seepage meters. Comparison of the methods showed that all identified a similar trend of low to high groundwater discharges moving westward along the transect. Furthermore, it was found that the differences between discharges estimated from Darcy calculations (using the mini‐pizometers), and SBPVPs were not statistically different from zero, at the 90% confidence level. Seepage meter estimates were consistently lower than those of the other two methods, but compared more reasonably with the application of a correction factor of 1.7, taken from the literature. In contrast, discharges estimated from temperature profiling (to a depth of 40 cm) were found to be about an order of magnitude less than those determined with the other methods, possibly due to interferences from horizontal hyporheic flow. Where the various methods produced statistically different discharge estimations at the same location, it is hypothesized that the differences arose from method‐specific sources of bias, including installation depths. On the basis of this work, practitioners interested in measuring flow across the groundwater‐surface water interface achieve the least variability with seepage meters and the SBPVP. However the accuracy of the seepage meter depended on a calibrated correction factor while that of the SBPVP did not.

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Heat tracing to determine spatial patterns of hyporheic exchange across a river transect

Cited by 13 publications

References 57 publications

Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

Effect of Hyporheic Exchange on Macroinvertebrate Community in the Weihe River Basin, China

Field Experiments of Hyporheic Flow Affected by a Clay Lens

A Comparison of Tools and Methods for Estimating Groundwater‐Surface Water Exchange

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