Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake Væng, Denmark): implications for lake ecological state and restoration

Jacob Baarstrøm Kidmose; Bertel Nilsson; Peter Knudegaard Engesgaard; Mette Frandsen; Sachin Karan; Frank Landkildehus; Martin Søndergaard; Erik Jeppesen

doi:10.1007/s10040-013-1043-7

Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake Væng, Denmark): implications for lake ecological state and restoration

Jacob Baarstrøm Kidmose, Bertel Nilsson, Peter Knudegaard Engesgaard, Mette Frandsen, Sachin Karan, Frank Landkildehus, Martin Søndergaard, Erik Jeppesen

Geologi

46 Citationer (Scopus)

Abstract

A study on Lake Væng in Denmark demonstrates a high potential for loading of phosphorous via groundwater to seepage lakes. Groundwater discharges are displayed as an important source of phosphorous to a lake due to: (1) high concentrations in the aquifer just below the lake, and (2) the main flow paths through the aquifer–lakebed interface either being overland flow through a seepage face, or focused in zones with very high discharge rates. In-lake springs have measured discharge of up to 7.45 m3 per m2 of lakebed per day. These findings were based on seepage meter measurements at 18 locations, stable isotope (δ18O) analyses, temperature profiles and mapping of ice cover distribution. Groundwater–lake interaction was modelled with a 2D conceptual flow model (MODFLOW) with hydrogeology interpreted from catchment multi electrode profiling, on-lake ground-penetrating radar, well logging and borehole data. Discharge was found to be much focused and opposite to expected increase away from the shoreline. The average total phosphorus concentration in discharging groundwater sampled just beneath the lakebed was 0.162 mg TP/l and thereby well over freshwater ecological thresholds (0.043–0.612, median = 0.117 mg TP/l). The study illustrates a direct link between groundwater and lake chemistry

Originalsprog	Engelsk
Tidsskrift	Hydrogeology Journal
Vol/bind	21
Udgave nummer	8
Sider (fra-til)	1787-1802
Antal sider	16
ISSN	1431-2174
DOI	https://doi.org/10.1007/s10040-013-1043-7
Status	Udgivet - dec. 2013

Adgang til dokumentet

10.1007/s10040-013-1043-7

Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake Væng, Denmark): implications for lake ecological state and restorationForlagets udgivne version, 3,19 MB

Citationsformater

Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake Væng, Denmark) : implications for lake ecological state and restoration. / Kidmose, Jacob Baarstrøm; Nilsson, Bertel; Engesgaard, Peter Knudegaard et al.

I: Hydrogeology Journal, Bind 21, Nr. 8, 12.2013, s. 1787-1802.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review

@article{70e88e2ea31e44ad9402618c0079f50c,

title = "Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake V{\ae}ng, Denmark): implications for lake ecological state and restoration",

abstract = "A study on Lake V{\ae}ng in Denmark demonstrates a high potential for loading of phosphorous via groundwater to seepage lakes. Groundwater discharges are displayed as an important source of phosphorous to a lake due to: (1) high concentrations in the aquifer just below the lake, and (2) the main flow paths through the aquifer–lakebed interface either being overland flow through a seepage face, or focused in zones with very high discharge rates. In-lake springs have measured discharge of up to 7.45 m3 per m2 of lakebed per day. These findings were based on seepage meter measurements at 18 locations, stable isotope (δ18O) analyses, temperature profiles and mapping of ice cover distribution. Groundwater–lake interaction was modelled with a 2D conceptual flow model (MODFLOW) with hydrogeology interpreted from catchment multi electrode profiling, on-lake ground-penetrating radar, well logging and borehole data. Discharge was found to be much focused and opposite to expected increase away from the shoreline. The average total phosphorus concentration in discharging groundwater sampled just beneath the lakebed was 0.162 mg TP/l and thereby well over freshwater ecological thresholds (0.043–0.612, median = 0.117 mg TP/l). The study illustrates a direct link between groundwater and lake chemistry",

author = "Kidmose, {Jacob Baarstr{\o}m} and Bertel Nilsson and Engesgaard, {Peter Knudegaard} and Mette Frandsen and Sachin Karan and Frank Landkildehus and Martin S{\o}ndergaard and Erik Jeppesen",

year = "2013",

month = dec,

doi = "10.1007/s10040-013-1043-7",

language = "English",

volume = "21",

pages = "1787--1802",

journal = "Hydrogeology Journal",

issn = "1431-2174",

publisher = "Springer",

number = "8",

}

TY - JOUR

T1 - Focused groundwater discharge of phosphorus to a eutrophic seepage lake (Lake Væng, Denmark)

T2 - implications for lake ecological state and restoration

AU - Kidmose, Jacob Baarstrøm

AU - Nilsson, Bertel

AU - Engesgaard, Peter Knudegaard

AU - Frandsen, Mette

AU - Karan, Sachin

AU - Landkildehus, Frank

AU - Søndergaard, Martin

AU - Jeppesen, Erik

PY - 2013/12

Y1 - 2013/12

N2 - A study on Lake Væng in Denmark demonstrates a high potential for loading of phosphorous via groundwater to seepage lakes. Groundwater discharges are displayed as an important source of phosphorous to a lake due to: (1) high concentrations in the aquifer just below the lake, and (2) the main flow paths through the aquifer–lakebed interface either being overland flow through a seepage face, or focused in zones with very high discharge rates. In-lake springs have measured discharge of up to 7.45 m3 per m2 of lakebed per day. These findings were based on seepage meter measurements at 18 locations, stable isotope (δ18O) analyses, temperature profiles and mapping of ice cover distribution. Groundwater–lake interaction was modelled with a 2D conceptual flow model (MODFLOW) with hydrogeology interpreted from catchment multi electrode profiling, on-lake ground-penetrating radar, well logging and borehole data. Discharge was found to be much focused and opposite to expected increase away from the shoreline. The average total phosphorus concentration in discharging groundwater sampled just beneath the lakebed was 0.162 mg TP/l and thereby well over freshwater ecological thresholds (0.043–0.612, median = 0.117 mg TP/l). The study illustrates a direct link between groundwater and lake chemistry

AB - A study on Lake Væng in Denmark demonstrates a high potential for loading of phosphorous via groundwater to seepage lakes. Groundwater discharges are displayed as an important source of phosphorous to a lake due to: (1) high concentrations in the aquifer just below the lake, and (2) the main flow paths through the aquifer–lakebed interface either being overland flow through a seepage face, or focused in zones with very high discharge rates. In-lake springs have measured discharge of up to 7.45 m3 per m2 of lakebed per day. These findings were based on seepage meter measurements at 18 locations, stable isotope (δ18O) analyses, temperature profiles and mapping of ice cover distribution. Groundwater–lake interaction was modelled with a 2D conceptual flow model (MODFLOW) with hydrogeology interpreted from catchment multi electrode profiling, on-lake ground-penetrating radar, well logging and borehole data. Discharge was found to be much focused and opposite to expected increase away from the shoreline. The average total phosphorus concentration in discharging groundwater sampled just beneath the lakebed was 0.162 mg TP/l and thereby well over freshwater ecological thresholds (0.043–0.612, median = 0.117 mg TP/l). The study illustrates a direct link between groundwater and lake chemistry

U2 - 10.1007/s10040-013-1043-7

DO - 10.1007/s10040-013-1043-7

M3 - Journal article

SN - 1431-2174

VL - 21

SP - 1787

EP - 1802

JO - Hydrogeology Journal

JF - Hydrogeology Journal

IS - 8

ER -