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Conceptual Mini-Catchment Typologies for Testing Dominant Controls of Nutrient Dynamics in Three Nordic Countries

Hashemi, Fatemeh and Pohle, Ina and Pullens, Johannes W. M. and Tornbjerg, Henrik and Kyllmar, Katarina and Marttila, Hannu and Lepisto, Ahti and Klove, Bjorn and Futter, Martyn and Kronvang, Brian (2020). Conceptual Mini-Catchment Typologies for Testing Dominant Controls of Nutrient Dynamics in Three Nordic Countries. Water. 12 , 1776 , 1-17
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Abstract

Optimal nutrient pollution monitoring and management in catchments requires an in-depth understanding of spatial and temporal factors controlling nutrient dynamics. Such an understanding can potentially be obtained by analysing stream concentration-discharge (C-Q) relationships for hysteresis behaviours and export regimes. Here, a classification scheme including nine different C-Q types was applied to a total of 87 Nordic streams draining mini-catchments (0.1-65 km(2)). The classification applied is based on a combination of stream export behaviour (dilution, constant, enrichment) and hysteresis rotational pattern (clock-wise, no rotation, anti-clockwise). The scheme has been applied to an 8-year data series (2010-2017) from small streams in Denmark, Sweden, and Finland on daily discharge and discrete nutrient concentrations, including nitrate (NO3-), total organic N (TON), dissolved reactive phosphorus (DRP), and particulate phosphorus (PP). The dominant nutrient export regimes were enrichment for NO(3)(-)and constant for TON, DRP, and PP. Nutrient hysteresis patterns were primarily clockwise or no hysteresis. Similarities in types of C-Q relationships were investigated using Principal Component Analysis (PCA) considering effects of catchment size, land use, climate, and dominant soil type. The PCA analysis revealed that land use and air temperature were the dominant factors controlling nutrient C-Q types. Therefore, the nutrient export behaviour in streams draining Nordic mini-catchments seems to be dominantly controlled by their land use characteristics and, to a lesser extent, their climate.

Authors/Creators:Hashemi, Fatemeh and Pohle, Ina and Pullens, Johannes W. M. and Tornbjerg, Henrik and Kyllmar, Katarina and Marttila, Hannu and Lepisto, Ahti and Klove, Bjorn and Futter, Martyn and Kronvang, Brian
Title:Conceptual Mini-Catchment Typologies for Testing Dominant Controls of Nutrient Dynamics in Three Nordic Countries
Year of publishing :2020
Volume:12
Article number:1776
Number of Pages:17
Publisher:MDPI
ISSN:2073-4441
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 105 Earth and Related Environmental Sciences > Oceanography, Hydrology, Water Resources
Keywords:water quality, concentration-discharge relationship, export behaviour, hysteresis, PCA
URN:NBN:urn:nbn:se:slu:epsilon-p-107131
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107131
Additional ID:
Type of IDID
DOI10.3390/w12061776
Web of Science (WoS)000550871600001
ID Code:17432
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Aquatic Sciences and Assessment
(NL, NJ) > Dept. of Soil and Environment
(S) > Dept. of Soil and Environment
Deposited By: SLUpub Connector
Deposited On:10 Sep 2020 07:55
Metadata Last Modified:10 Sep 2020 07:55

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