Dissolved Organic Carbon and Estrogen Transport in Surface Runoff From Agricultural Land Receiving Poultry Litter1

Abstract. The surrounding landscape of a stream has crucial impacts on the aquatic environment. This study pictures the hydro-biogeochemical situation of the Tyrebækken creek catchment in central Jutland, Denmark. The intensively managed agricultural landscape is dominated by rotational croplands. The small catchment mainly consist of sandy soil types besides organic soils along the streams. The aim of the study was to characterise the relative influence of soil type and land use on stream water quality. Nine snapshot sampling campaigns were undertaken during the growing season of 2009. Total dissolved nitrogen (TDN), nitrate (NO3−), ammonium nitrogen and dissolved organic carbon (DOC) concentrations were measured, and dissolved organic nitrogen (DON) was calculated for each grabbed sample. Electrical conductivity, pH and flow velocity were measured during sampling. Statistical analyses showed significant differences between the northern, southern and converged stream parts, especially for NO3− concentrations with average values between 1.4 mg N l−1 and 9.6 mg N l−1. Furthermore, throughout the sampling period DON concentrations increased to 2.8 mg N l−1 in the northern stream contributing up to 81% to TDN. Multiple-linear regression analyses performed between chemical data and landscape characteristics showed a significant negative influence of organic soils on instream N concentrations and corresponding losses in spite of their overall minor share of the agricultural land (12.9%). On the other hand, organic soil frequency was positively correlated to the corresponding DOC concentrations. Croplands also had a significant influence but with weaker correlations. For our case study we conclude that the fractions of coarse textured and organic soils have a major influence on N and DOC export in this intensively used landscape. Meanwhile, the contribution of DON to the total N losses was substantial.

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Effects of intermittency and land use on the in-stream phosphorus and organic carbon uptake

10.5194/egusphere-egu2020-2337 ◽

2020 ◽

Author(s):

Gabriele Weigelhofer ◽

Matthias Pucher

Keyword(s):

Land Use ◽

Organic Carbon ◽

Dissolved Organic Carbon ◽

Hyporheic Zone ◽

Agricultural Land ◽

Headwater Streams ◽

Phosphorus Release ◽

Nutrient Concentrations ◽

Agricultural Land Use ◽

First Results

Understanding the consequences of the interplay between land use and climate change is among the most pressing challenges of the 21st century for river managers. Over the past decades, agricultural land use has altered nutrient concentrations and stoichiometric ratios in stream ecosystems, thereby affecting aquatic biogeochemical cycles and the coupling among carbon, phosphorus, and nitrogen. In addition, the frequency and duration of droughts has increased dramatically across Europe, causing perennial streams to shift to intermittency and changing the capacity of sediments for the uptake and storage of macronutrients.Our study aims to understand the effects of drying and re-wetting on the uptake, storage, and release of phosphorus and organic carbon from the benthic and the hyporheic zone of headwater streams under the additional stressor of agricultural land use. In specific, we are interested in the potential coupling and decoupling of phosphorus and dissolved organic carbon cycling in autotrophic and heterotrophic benthic biofilms. We sampled headwater streams before, during, and after the dry period in 2018 and 2019 and performed laboratory experiments with artificial drying and re-wetting and additions of dissolved organic carbon. We measured nutrient uptake and release, microbial biomass, respiration, and the activity of extra-cellular enzymes. The first results show an increased phosphorus release from the sediments immediately after re-wetting, foolowed by a reduced uptake capacity. The uptake of DOC was correlated with phosphorus in autotrophic biofilms, but not in heterotrophic ones.

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Small-scale topography explains patterns and dynamics of dissolved organic carbon exports from the riparian zone of a temperate, forested catchment

Hydrology and Earth System Sciences ◽

10.5194/hess-25-6067-2021 ◽

2021 ◽

Vol 25 (12) ◽

pp. 6067-6086

Author(s):

Benedikt J. Werner ◽

Oliver J. Lechtenfeld ◽

Andreas Musolff ◽

Gerrit H. de Rooij ◽

Jie Yang ◽

...

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Surface Runoff ◽

Stream Water ◽

Surface Flow ◽

Small Scale ◽

Topographic Wetness Index ◽

Forested Catchment ◽

Source Zones ◽

Doc Export

Abstract. Export of dissolved organic carbon (DOC) from riparian zones (RZs) is an important component of temperate catchment carbon budgets, but export mechanisms are still poorly understood. Here we show that DOC export is predominantly controlled by the microtopography of the RZ (lateral variability) and by riparian groundwater level dynamics (temporal variability). From February 2017 until July 2019 we studied topography, DOC quality and water fluxes and pathways in the RZ of a small forested catchment and the receiving stream in central Germany. The chemical classification of the riparian groundwater and surface water samples (n=66) by Fourier transform ion cyclotron resonance mass spectrometry revealed a cluster of plant-derived, aromatic and oxygen-rich DOC with high concentrations (DOCI) and a cluster of microbially processed, saturated and heteroatom-enriched DOC with lower concentrations (DOCII). The two DOC clusters were connected to locations with distinctly different values of the high-resolution topographic wetness index (TWIHR; at 1 m resolution) within the study area. Numerical water flow modeling using the integrated surface–subsurface model HydroGeoSphere revealed that surface runoff from high-TWIHR zones associated with the DOCI cluster (DOCI source zones) dominated overall discharge generation and therefore DOC export. Although corresponding to only 15 % of the area in the studied RZ, the DOCI source zones contributed 1.5 times the DOC export of the remaining 85 % of the area associated with DOCII source zones. Accordingly, DOC quality in stream water sampled under five event flow conditions (n=73) was closely reflecting the DOCI quality. Our results suggest that DOC export by surface runoff along dynamically evolving surface flow networks can play a dominant role for DOC exports from RZs with overall low topographic relief and should consequently be considered in catchment-scale DOC export models. We propose that proxies of spatial heterogeneity such as the TWIHR can help to delineate the most active source zones and provide a mechanistic basis for improved model conceptualization of DOC exports.

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Controls on dissolved organic carbon export through surface runoff from loamy agricultural soils

Geoderma ◽

10.1016/j.geoderma.2014.03.018 ◽

2014 ◽

Vol 226-227 ◽

pp. 387-396 ◽

Cited By ~ 26

Author(s):

Nele Van Gaelen ◽

Veerle Verschoren ◽

Wim Clymans ◽

Jean Poesen ◽

Gerard Govers ◽

...

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Surface Runoff ◽

Agricultural Soils ◽

Carbon Export

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The importance of riparian zones on stream carbon and nitrogen export in a temperate, agricultural dominated landscape

Biogeosciences Discussions ◽

10.5194/bgd-9-7465-2012 ◽

2012 ◽

Vol 9 (6) ◽

pp. 7465-7497 ◽

Cited By ~ 4

Author(s):

T. Wohlfart ◽

J.-F. Exbrayat ◽

K. Schelde ◽

B. Christen ◽

T. Dalgaard ◽

...

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Dissolved Organic Nitrogen ◽

Organic Nitrogen ◽

Agricultural Land ◽

Stream Water ◽

Soil Types ◽

Organic Soils ◽

Dissolved Nitrogen ◽

Total Dissolved Nitrogen

Abstract. The surrounding landscape of a stream has crucial impacts on the aquatic environment. This study pictures the hydro-biogeochemical situation of the Tyrebaekken creek catchment in central Jutland, Denmark. The intensively managed agricultural landscape is dominated by rotational croplands. One northern and one southern stream run through the catchment before converging to form a second order brook. The small catchments mainly consist of sandy soil types besides organic soils along the riparian zone of the streams. The aim of the study was to characterise the relative influence of soil type and land use on stream water quality. Nine snapshot sampling campaigns were undertaken during the growing season of 2009. On each sampling day, 20 points along the stream were sampled as well as eight drain outlets and two groundwater wells. Total dissolved nitrogen, nitrate, ammonium nitrogen and dissolved organic carbon (DOC) concentrations were measured and dissolved organic nitrogen (DON) was calculated for each grabbed sample. Electro-conductivity, pH and flow velocity were measured during sampling. Statistical analyses showed significant differences between the northern, southern and converged stream parts, especially for nitrate concentrations with average values of 9.6 mg N l−1, 1.4 mg N l−1 and 3.0 mg N l−1, respectively. Furthermore, throughout the sampling period DON concentrations increased from 0.1 mg N l−1 to 2.8 mg N l−1 and from 0.1 mg N l−1 to 0.8 mg N l−1in the northern and southern streams, respectively. This corresponded to a contribution of up to 81% to total dissolved nitrogen. Multiple-linear regression analyses performed between chemical data and landscape charateristics showed a significant negative influence of organic soils on instream N concentrations and corresponding losses in spite of their overall minor share of the agricultural land (12.9%). On the other hand, organic soil frequency was positively correlated to the corresponding dissolved organic carbon concentrations. Croplands also had a significant influence but with weaker correlations. For our case study we conclude that soil types and corresponding biogeochemical properties have a major influence on stream water chemistry. Meanwhile, the contribution of dissolved organic nitrogen to the total nitrogen budget was substantial in this agricultural dominated landscape.

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Effects of native perennial vegetation buffer strips on dissolved organic carbon in surface runoff from an agricultural landscape

Biogeochemistry ◽

10.1007/s10533-014-9985-y ◽

2014 ◽

Vol 120 (1-3) ◽

pp. 121-132 ◽

Cited By ~ 9

Author(s):

Tomorra E. Smith ◽

Randall K. Kolka ◽

Xiaobo Zhou ◽

Matthew J. Helmers ◽

Richard M. Cruse ◽

...

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Surface Runoff ◽

Agricultural Landscape ◽

Buffer Strips ◽

Perennial Vegetation

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Effects of soil organic residue amendment on losses of dissolved organic carbon, P, Cu and Zn via surface runoff from arable soils

Soil and Tillage Research ◽

10.1016/j.still.2019.104352 ◽

2019 ◽

Vol 195 ◽

pp. 104352

Author(s):

Pu Shi ◽

Rainer Schulin

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Surface Runoff ◽

Organic Residue ◽

Arable Soils ◽

Cu And Zn

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Effects of native perennial vegetation buffer strips on dissolved organic carbon in surface runoff from an agricultural landscape

10.31274/etd-180810-3394 ◽

2012 ◽

Author(s):

Tomorra Elizabeth Smith

Keyword(s):

Organic Carbon ◽

Dissolved Organic Carbon ◽

Surface Runoff ◽

Agricultural Landscape ◽

Buffer Strips ◽

Perennial Vegetation

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Effects of a Forested State Park on Suspended Solid and Dissolved Organic Carbon Concentrations in an Agriculturally Impacted Watershed

10.5194/egusphere-egu21-763 ◽

2021 ◽

Author(s):

Eileen Rintsch ◽

Tessa Farthing ◽

Bartosz Grudzinski

Keyword(s):

Water Quality ◽

Organic Carbon ◽

Dissolved Organic Carbon ◽

Agricultural Land ◽

Temporal Dynamics ◽

Suspended Solid ◽

Spatial And Temporal Dynamics ◽

Agricultural Areas ◽

Work Done ◽

Carbon Concentrations

Previous research has indicated that agricultural land use can reduce water quality in streams. This includes: 1) an increase in suspended solids (SS) due to elevated erosion and 2) shifts in dissolved organic carbon (DOC) particularly due to different C:N between agricultural crops and natural vegetation. We examine spatial and temporal dynamics of SS and DOC in four rivers, located in an agriculturally impacted watershed in SW Ohio, as they flow from agricultural land cover through a naturally forested State Park. Nineteen surface water sites were sampled bimonthly from December 2019 to December 2020. Results will be presented to determine if a forested state park improved the water quality in SW Ohio. We will further discuss how the work done in SW Ohio could be replicated in other intensive agricultural areas of Europe with similar climate patterns.

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