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1. Reconceptualizing the hyporheic zone for nonperennial rivers and streams

   https://doi.org/10.1086/720071  

   DelVecchia, Amanda G.; Shanafield, Margaret; Zimmer, Margaret A.; Busch, Michelle H.; Krabbenhoft, Corey A.; Stubbington, Rachel; Kaiser, Kendra E.; Burrows, Ryan M.; Hosen, Jake; Datry, Thibault; et al (June 2022, Freshwater Science)
2. Stream Transport and Substrate Controls on Nitrous Oxide Yields From Hyporheic Zone Denitrification

   https://doi.org/10.1029/2021AV000517  

   Winnick, M. J. (October 2021, AGU Advances)

   Abstract Rivers and streams act as globally significant sources of nitrous oxide (N₂O) to the atmosphere, in part through denitrification reactions that will increase in response to ongoing anthropogenic nitrogen loading. While many factors that contribute to the release of N₂O relative to inert dinitrogen (N₂) are well described, the ability to predict N₂O yields from streams remains a fundamental challenge. Here, I revisit results from the second Lotic Intersite Nitrogen eXperiments (LINX II) in the context of turbulent hyporheic exchange. Denitrification efficiency, or the fraction of nitrate delivered to the streambed by stream turbulence that is chemically reduced, emerges as the single best predictor of N₂O yields and underpins the first statistically significant models of inter‐site N₂O yields. This mechanistic connection is supported by reactive transport modeling of hyporheic zone denitrification representing advective flowpaths, flowpath mixing, and diffusion‐dominated anoxic microzones. Simulated N₂O yields are inversely correlated with denitrification efficiency; however, advective models are unable to capture low LINX II N₂O yields at low denitrification efficiencies. Hyporheic zone mixing exacerbates this inability to capture observed N₂O yields via the promotion of N₂O release from fast, oxic flowpaths. Instead, anoxic microzones are required to account for LINX II observations through consistently low N₂O yields and the consumption of upstream‐produced N₂O. Together, these results provide a framework for controls on stream N₂O yields and suggest that stream corridor restoration designs aimed at increasing the capacity of hyporheic zones to remediate nitrate loading, as opposed to increasing hyporheic exchange, will also reduce proportional N₂O emissions. 

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3. A numerical exploration of hyporheic zone solute transport behavior estimated from electrical resistivity inversions

   https://doi.org/10.1016/j.jhydrol.2023.129577  

   Zhang, Xiaolang; Sawyer, Audrey H.; Singha, Kamini (June 2023, Journal of Hydrology)
4. Time‐Variable Transit Time Distributions in the Hyporheic Zone of a Headwater Mountain Stream

   https://doi.org/10.1002/2017WR021502  

   Ward, Adam S.; Schmadel, Noah M.; Wondzell, Steven M. (March 2018, Water Resources Research)
5. Buried particulate organic C fuels heterotrophic metabolism in the hyporheic zone of a montane headwater stream

   https://doi.org/10.1086/731772  

   Serchan, Satish P; Wondzell, Steven M; Haggerty, Roy; Pennington, Robert; Feris, Kevin; Sanfilippo, Angelo; Tonina, Daniele; Reeder, W Jeffery (September 2024, Freshwater Science)