Hydrological and hydrochemical behavior of a riparian zone in a high-order flatland stream

E. A. Veizaga, C. J. Ocampo, L. Rodriguez

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Hydrological and hydrochemical processes occurring within riparian zones in temperate mid-latitudes flatland areas have significant implications for water management by controlling nutrient transfer between the watershed and the stream system. The riparian zone in a high-order flatland stream located within a 7063-km(2) agricultural watershed in Argentina was investigated to study its hydrological connectivity to upland zones, interactions with the stream, and their implications for groundwater hydrochemistry. The analysis was based on 9-year-long time series of groundwater/stream water levels collected along a 220-m-long transect comprising six piezometers, a river stage sensor, and hydrochemical information from 37 groundwater/stream water sampling campaigns. Samples were analyzed for electrical conductivity (EC), Cl-, SO4+2, (Ca+2+Mg+2), pH, and redox potential (ORP). Data were interpreted using descriptive statistics, statistical tests, groundwater flux calculations, and identification of hydrological patterns and associated hydrochemical responses. The system was hydrologically controlled by shallow groundwater. Three representative landscape hydrological patterns were identified: disconnected, incipient-weakly connected, and fully connected. Groundwater hydrochemistry was closely linked to hydrological connectivity, which played an important role in the mobilization and fluxes of solutes. Overall, groundwater EC, Cl-, SO4+2, and (Ca+2+Mg+2) concentrations decreased from upland to lowland. For full connectivity, Cl- concentrations reduced 33%, while SO4+2 reduced 42%, demonstrating the system's buffering capacity. This investigation constitutes the first attempt to formulate the riparian zone functioning in this agricultural region and has contributed to the understanding on the complex interactions between hydrologic regimes of large flatland-high-order streams and shallow groundwater systems in fine-texture sediments.

Original languageEnglish
Article number10
Number of pages17
JournalEnvironmental Monitoring and Assessment
Volume191
Issue number1
DOIs
Publication statusPublished - Jan 2019

Cite this

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title = "Hydrological and hydrochemical behavior of a riparian zone in a high-order flatland stream",
abstract = "Hydrological and hydrochemical processes occurring within riparian zones in temperate mid-latitudes flatland areas have significant implications for water management by controlling nutrient transfer between the watershed and the stream system. The riparian zone in a high-order flatland stream located within a 7063-km(2) agricultural watershed in Argentina was investigated to study its hydrological connectivity to upland zones, interactions with the stream, and their implications for groundwater hydrochemistry. The analysis was based on 9-year-long time series of groundwater/stream water levels collected along a 220-m-long transect comprising six piezometers, a river stage sensor, and hydrochemical information from 37 groundwater/stream water sampling campaigns. Samples were analyzed for electrical conductivity (EC), Cl-, SO4+2, (Ca+2+Mg+2), pH, and redox potential (ORP). Data were interpreted using descriptive statistics, statistical tests, groundwater flux calculations, and identification of hydrological patterns and associated hydrochemical responses. The system was hydrologically controlled by shallow groundwater. Three representative landscape hydrological patterns were identified: disconnected, incipient-weakly connected, and fully connected. Groundwater hydrochemistry was closely linked to hydrological connectivity, which played an important role in the mobilization and fluxes of solutes. Overall, groundwater EC, Cl-, SO4+2, and (Ca+2+Mg+2) concentrations decreased from upland to lowland. For full connectivity, Cl- concentrations reduced 33{\%}, while SO4+2 reduced 42{\%}, demonstrating the system's buffering capacity. This investigation constitutes the first attempt to formulate the riparian zone functioning in this agricultural region and has contributed to the understanding on the complex interactions between hydrologic regimes of large flatland-high-order streams and shallow groundwater systems in fine-texture sediments.",
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language = "English",
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journal = "Environmental Monitoring and Assessment",
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Hydrological and hydrochemical behavior of a riparian zone in a high-order flatland stream. / Veizaga, E. A.; Ocampo, C. J.; Rodriguez, L.

In: Environmental Monitoring and Assessment, Vol. 191, No. 1, 10, 01.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hydrological and hydrochemical behavior of a riparian zone in a high-order flatland stream

AU - Veizaga, E. A.

AU - Ocampo, C. J.

AU - Rodriguez, L.

PY - 2019/1

Y1 - 2019/1

N2 - Hydrological and hydrochemical processes occurring within riparian zones in temperate mid-latitudes flatland areas have significant implications for water management by controlling nutrient transfer between the watershed and the stream system. The riparian zone in a high-order flatland stream located within a 7063-km(2) agricultural watershed in Argentina was investigated to study its hydrological connectivity to upland zones, interactions with the stream, and their implications for groundwater hydrochemistry. The analysis was based on 9-year-long time series of groundwater/stream water levels collected along a 220-m-long transect comprising six piezometers, a river stage sensor, and hydrochemical information from 37 groundwater/stream water sampling campaigns. Samples were analyzed for electrical conductivity (EC), Cl-, SO4+2, (Ca+2+Mg+2), pH, and redox potential (ORP). Data were interpreted using descriptive statistics, statistical tests, groundwater flux calculations, and identification of hydrological patterns and associated hydrochemical responses. The system was hydrologically controlled by shallow groundwater. Three representative landscape hydrological patterns were identified: disconnected, incipient-weakly connected, and fully connected. Groundwater hydrochemistry was closely linked to hydrological connectivity, which played an important role in the mobilization and fluxes of solutes. Overall, groundwater EC, Cl-, SO4+2, and (Ca+2+Mg+2) concentrations decreased from upland to lowland. For full connectivity, Cl- concentrations reduced 33%, while SO4+2 reduced 42%, demonstrating the system's buffering capacity. This investigation constitutes the first attempt to formulate the riparian zone functioning in this agricultural region and has contributed to the understanding on the complex interactions between hydrologic regimes of large flatland-high-order streams and shallow groundwater systems in fine-texture sediments.

AB - Hydrological and hydrochemical processes occurring within riparian zones in temperate mid-latitudes flatland areas have significant implications for water management by controlling nutrient transfer between the watershed and the stream system. The riparian zone in a high-order flatland stream located within a 7063-km(2) agricultural watershed in Argentina was investigated to study its hydrological connectivity to upland zones, interactions with the stream, and their implications for groundwater hydrochemistry. The analysis was based on 9-year-long time series of groundwater/stream water levels collected along a 220-m-long transect comprising six piezometers, a river stage sensor, and hydrochemical information from 37 groundwater/stream water sampling campaigns. Samples were analyzed for electrical conductivity (EC), Cl-, SO4+2, (Ca+2+Mg+2), pH, and redox potential (ORP). Data were interpreted using descriptive statistics, statistical tests, groundwater flux calculations, and identification of hydrological patterns and associated hydrochemical responses. The system was hydrologically controlled by shallow groundwater. Three representative landscape hydrological patterns were identified: disconnected, incipient-weakly connected, and fully connected. Groundwater hydrochemistry was closely linked to hydrological connectivity, which played an important role in the mobilization and fluxes of solutes. Overall, groundwater EC, Cl-, SO4+2, and (Ca+2+Mg+2) concentrations decreased from upland to lowland. For full connectivity, Cl- concentrations reduced 33%, while SO4+2 reduced 42%, demonstrating the system's buffering capacity. This investigation constitutes the first attempt to formulate the riparian zone functioning in this agricultural region and has contributed to the understanding on the complex interactions between hydrologic regimes of large flatland-high-order streams and shallow groundwater systems in fine-texture sediments.

KW - Riparian zones

KW - Buffering capacity

KW - Hydrological connectivity

KW - Sulfate reduction

KW - SURFACE-WATER INTERACTIONS

KW - NITRATE REMOVAL

KW - AGRICULTURAL CATCHMENTS

KW - HIGH-FREQUENCY

KW - BUFFER ZONES

KW - GROUNDWATER

KW - DYNAMICS

KW - TRANSPORT

KW - NITROGEN

KW - CONNECTIVITY

U2 - 10.1007/s10661-018-7136-y

DO - 10.1007/s10661-018-7136-y

M3 - Article

VL - 191

JO - Environmental Monitoring and Assessment

JF - Environmental Monitoring and Assessment

SN - 0167-6369

IS - 1

M1 - 10

ER -