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Cape Shores Porewater Data Compilation 2014-2015

Authors: Kyra H. Kim
Owners: Kyra H. Kim
Resource type:Composite Resource
Created:Dec 26, 2018 at 10:23 p.m.
Last updated: Dec 26, 2018 at 10:30 p.m. by Kyra H. Kim


Biogeochemical reactions within intertidal zones of coastal aquifers, induced by the mixing between fresh groundwater and saline seawater, have been shown to alter the concentrations of terrestrial solutes prior to their coastal discharge. In organic-poor sandy aquifers, the input of marine organic matter from infiltrating seawater has been attributed to active biogeochemical reactions within the sediments. However, while the seasonality of surface water organic carbon concentrations (primary production) and groundwater mixing patterns have been well-documented, there has been limited speculation on the contributions of particulate organic carbon pools within the sediments that arise from transient hydrologic conditions. To understand the relationship between physical movements of the circulation cell and the seasonal migration of geochemical patterns, beach porewater and sediment samples from six field sampling events spanning two years were analyzed. While oxygen saturation, oxygen consumption rates, and silica distributions closely followed the seasonally-dynamic salinity, other chemically-reactive parameters (pH, ORP) and nutrient characteristics (N distributions, denitrification rates, reactive organic carbon distributions) were unrelated to contemporaneous salinity patterns. Particulate organic matter was distributed in pools within the aquifer due to the filtration effect of sediments, contributing to the divergence of chemical patterns from salinity patterns via nutrient release and leaching. Together, the results present the asynchronous movement of chemical conditions to salinity patterns due to the divergent transport pathways between solutes and particles arising from transient hydrologic forcing.

Subject Keywords

submarine groundwater discharge,coastal aquifer,diagenesis,organic matter,biogeochemistry,SGD,beach aquifer

How to cite

Kim, K. H. (2018). Cape Shores Porewater Data Compilation 2014-2015, HydroShare, http://www.hydroshare.org/resource/440e89b8cc8c4c43bdbc6176e8f38a70

This resource is shared under the Creative Commons Attribution-NoCommercial-ShareAlike CC BY-NC-SA.


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     Coordinate System/Geographic Projection:  WGS 84 EPSG:4326
     Coordinate Units:  Decimal degrees
    Place/Area Name: Cape Shores, Lewes, Delaware



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    The people or organizations that created the intellectual content of the resource.

    Name Organization Address Phone Author Identifiers
    Kyra H. Kim University of Delaware ORCID , ResearchGateID


    This resource was created using funding from the following sources:
    Agency Name Award Title Award Number
    National Science Foundation Hydrological Control of Particle Entrainment and Nitrogen Cycling in Beach Aquifer Mixing and Reaction Zones EAR-1246554


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