High Spatial Resolution Nitrogen Emission and Retention Maps of Three Danish Catchments Using Synchronous Measurements in Streams

Sofie Gyritia Madsen van't Veen; Jonas Rolighed; Jane R. Laugesen; Gitte Blicher-Mathiesen; Brian Kronvang

doi:10.3390/w15030498

High Spatial Resolution Nitrogen Emission and Retention Maps of Three Danish Catchments Using Synchronous Measurements in Streams

Sofie Gyritia Madsen van't Veen^*, Jonas Rolighed, Jane R. Laugesen, Gitte Blicher-Mathiesen, Brian Kronvang^*

^*Corresponding author for this work

Department of Ecoscience - Catchment Science and Environmental Management

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

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Abstract

We investigated the utility of using synchronous measurements to create nitrogen (N) emission and retention maps of agricultural areas. Total N (TN) emissions from agricultural areas in three different Danish pilot catchments (1800–3737 ha) and within sub-catchments (100–1200 ha) were determined by a source apportionment approach. Intensive daily (main gauging stations) and fortnightly (synchronous stations) monitoring of discharge, TN, and nitrate-N (NO3-N) concentrations was conducted for two years. The groundwater N retention was calculated as the difference between a model-calculated NO3-N leaching from agricultural fields and the calculated agricultural N emission. The average annual N leaching and N emission in the three catchments amounted to 68, 48, and 58 kg N/ha and 6, 30, and 40 kg N/ha, respectively. The N retention in groundwater in the three catchments, calculated based on either TN or NO3-N emissions, amounted to 26 and 44%, 44 and 57%, and 93 and 97%, respectively, with large variations within two of the main catchments. From this study, we conclude that synchronous measurements in streams provide a good opportunity for developing local N emission and N retention maps. However, NO3-N should be used when dealing with N retention calculation at the finer resolution scale of 100–300 ha catchments.

Original language	English
Article number	498
Journal	Water
Volume	15
Issue	3
Number of pages	23
ISSN	0310-0367
DOIs	https://doi.org/10.3390/w15030498
Publication status	Published - Feb 2023

Keywords

high spatial resolution monitoring
nitrogen emission
nitrogen regulation
nitrogen retention
small-scale catchment hydrology
stream measurement
uncertainty

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10.3390/w15030498Licence: CC BY

water-15-00498-v2Final published version, 5.21 MBLicence: CC BY

Cite this

@article{299e2c54f59a4972bada43da11ae27a4,

title = "High Spatial Resolution Nitrogen Emission and Retention Maps of Three Danish Catchments Using Synchronous Measurements in Streams",

abstract = "We investigated the utility of using synchronous measurements to create nitrogen (N) emission and retention maps of agricultural areas. Total N (TN) emissions from agricultural areas in three different Danish pilot catchments (1800–3737 ha) and within sub-catchments (100–1200 ha) were determined by a source apportionment approach. Intensive daily (main gauging stations) and fortnightly (synchronous stations) monitoring of discharge, TN, and nitrate-N (NO3-N) concentrations was conducted for two years. The groundwater N retention was calculated as the difference between a model-calculated NO3-N leaching from agricultural fields and the calculated agricultural N emission. The average annual N leaching and N emission in the three catchments amounted to 68, 48, and 58 kg N/ha and 6, 30, and 40 kg N/ha, respectively. The N retention in groundwater in the three catchments, calculated based on either TN or NO3-N emissions, amounted to 26 and 44%, 44 and 57%, and 93 and 97%, respectively, with large variations within two of the main catchments. From this study, we conclude that synchronous measurements in streams provide a good opportunity for developing local N emission and N retention maps. However, NO3-N should be used when dealing with N retention calculation at the finer resolution scale of 100–300 ha catchments.",

keywords = "high spatial resolution monitoring, nitrogen emission, nitrogen regulation, nitrogen retention, small-scale catchment hydrology, stream measurement, uncertainty",

author = "{van't Veen}, {Sofie Gyritia Madsen} and Jonas Rolighed and Laugesen, {Jane R.} and Gitte Blicher-Mathiesen and Brian Kronvang",

year = "2023",

month = feb,

doi = "10.3390/w15030498",

language = "English",

volume = "15",

journal = "Water",

issn = "0310-0367",

publisher = "Australian Water Association",

number = "3",

}

High Spatial Resolution Nitrogen Emission and Retention Maps of Three Danish Catchments Using Synchronous Measurements in Streams. / van't Veen, Sofie Gyritia Madsen ; Rolighed, Jonas; Laugesen, Jane R. et al.
In: Water, Vol. 15, No. 3, 498, 02.2023.

Research output: Contribution to journal/Conference contribution in journal/Contribution to newspaper › Journal article › Research › peer-review

TY - JOUR

T1 - High Spatial Resolution Nitrogen Emission and Retention Maps of Three Danish Catchments Using Synchronous Measurements in Streams

AU - van't Veen, Sofie Gyritia Madsen

AU - Rolighed, Jonas

AU - Laugesen, Jane R.

AU - Blicher-Mathiesen, Gitte

AU - Kronvang, Brian

PY - 2023/2

Y1 - 2023/2

N2 - We investigated the utility of using synchronous measurements to create nitrogen (N) emission and retention maps of agricultural areas. Total N (TN) emissions from agricultural areas in three different Danish pilot catchments (1800–3737 ha) and within sub-catchments (100–1200 ha) were determined by a source apportionment approach. Intensive daily (main gauging stations) and fortnightly (synchronous stations) monitoring of discharge, TN, and nitrate-N (NO3-N) concentrations was conducted for two years. The groundwater N retention was calculated as the difference between a model-calculated NO3-N leaching from agricultural fields and the calculated agricultural N emission. The average annual N leaching and N emission in the three catchments amounted to 68, 48, and 58 kg N/ha and 6, 30, and 40 kg N/ha, respectively. The N retention in groundwater in the three catchments, calculated based on either TN or NO3-N emissions, amounted to 26 and 44%, 44 and 57%, and 93 and 97%, respectively, with large variations within two of the main catchments. From this study, we conclude that synchronous measurements in streams provide a good opportunity for developing local N emission and N retention maps. However, NO3-N should be used when dealing with N retention calculation at the finer resolution scale of 100–300 ha catchments.

AB - We investigated the utility of using synchronous measurements to create nitrogen (N) emission and retention maps of agricultural areas. Total N (TN) emissions from agricultural areas in three different Danish pilot catchments (1800–3737 ha) and within sub-catchments (100–1200 ha) were determined by a source apportionment approach. Intensive daily (main gauging stations) and fortnightly (synchronous stations) monitoring of discharge, TN, and nitrate-N (NO3-N) concentrations was conducted for two years. The groundwater N retention was calculated as the difference between a model-calculated NO3-N leaching from agricultural fields and the calculated agricultural N emission. The average annual N leaching and N emission in the three catchments amounted to 68, 48, and 58 kg N/ha and 6, 30, and 40 kg N/ha, respectively. The N retention in groundwater in the three catchments, calculated based on either TN or NO3-N emissions, amounted to 26 and 44%, 44 and 57%, and 93 and 97%, respectively, with large variations within two of the main catchments. From this study, we conclude that synchronous measurements in streams provide a good opportunity for developing local N emission and N retention maps. However, NO3-N should be used when dealing with N retention calculation at the finer resolution scale of 100–300 ha catchments.

KW - high spatial resolution monitoring

KW - nitrogen emission

KW - nitrogen regulation

KW - nitrogen retention

KW - small-scale catchment hydrology

KW - stream measurement

KW - uncertainty

U2 - 10.3390/w15030498

DO - 10.3390/w15030498

M3 - Journal article

SN - 0310-0367

VL - 15

JO - Water

JF - Water

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ER -