Predicting dissolved reactive phosphorus in tile-drained catchments using a modified SWAT model

Bauwe, Andreas; Eckhardt, Kai‐Uwe; Lennartz, Bernd

doi:10.1016/j.ecohyd.2019.03.003

Cited by 23 publications

(7 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For the city area the calculated load of MPs per area would amount to about two billion MPs/km 2 /a accounting for traffic, industrial, and residential areas. For the Warnow catchment 3% (98 km 2 ) of land use is urban area (Bauwe et al, 2019). Assuming a comparable share of catchment classes and population density this would amount to a calculated MP emission of about 200 billion MPs/a.…”

Section: Practical Implications Of Applied Emission Scenariosmentioning

confidence: 99%

Combined Approaches to Predict Microplastic Emissions Within an Urbanized Estuary (Warnow, Southwestern Baltic Sea)

Piehl

Hauk

Robbe

et al. 2021

Front. Environ. Sci.

View full text Add to dashboard Cite

Microplastic river emissions are known to be one of the major sources for marine microplastic pollution. Especially urbanized estuaries localized at the land-sea interface and subjected to microplastic emissions from various sources exhibit a high microplastic discharge potential to adjacent coasts. To adapt effective measures against microplastic emissions a more detailed knowledge on the importance of various microplastic sources is necessary. As field data is scarce we combined different approaches to assess microplastic emissions into the Warnow estuary, southwestern Baltic Sea. Resulting microplastic emission estimates are based on in-situ measurements for the catchment emissions, whereas for the remaining microplastic sources within the estuary literature data on microplastic abundances, and various parameters were used (e.g. demographical, hydrological, geographical). The evaluation of the different emission scenarios revealed that the majority of microplastic is likely discharged by the Warnow river catchment (49.4%) and the separated city stormwater system (43.1%) into the estuary, followed by combined sewer discharges (6.1%). Wastewater treatment plant emissions exhibit the lowest percentage (1.4%). Our approach to estimate anti-fouling paint particles emissions from leisure and commercial shipping activities was associated with highest uncertainties. However, our results indicate the importance of this source highlighting the necessity for future research on the topic. Based on our assumptions for microplastic retention within the estuary, we estimate a potential annual emission of 152–291 billion microplastics (majority within the size class 10–100 µm) to the Baltic Sea. Considering all uncertainties of the different applied approaches, we could assess the importance of various microplastic sources which can be used by authorities to prioritize and establish emission reduction measures. Additionally, the study provides parameters for microplastic emission estimates that can be transferred from our model system to other urbanized Baltic estuaries.

show abstract

Section: Practical Implications Of Applied Emission Scenariosmentioning

confidence: 99%

Combined Approaches to Predict Microplastic Emissions Within an Urbanized Estuary (Warnow, Southwestern Baltic Sea)

Piehl

Hauk

Robbe

et al. 2021

Front. Environ. Sci.

View full text Add to dashboard Cite

show abstract

“…Golmohammadi et al [191] explicitly incorporated tile drainage into the SWAT model by replacing the subsurface hydrology of SWAT with the subsurface hydrology of DRAINMOD. Several other researchers have also reported an improved simulation of tile drain dominated watersheds using an improved tile drainage module in SWAT (e.g., [192]), including a module that can explicitly simulate dissolved reactive phosphorus through tile drains [193]. These improved methods still need a thorough evaluation to test their ability in simulating P loss and identifying CSAs in Canadian conditions.…”

Section: Tile Drainsmentioning

confidence: 99%

Currents Status, Challenges, and Future Directions in Identifying Critical Source Areas for Non-Point Source Pollution in Canadian Conditions

et al. 2020

View full text Add to dashboard Cite

Non-point source (NPS) pollution is an important problem that has been threatening freshwater resources throughout the world. Best Management Practices (BMPs) can reduce NPS pollution delivery to receiving waters. For economic reasons, BMPs should be placed at critical source areas (CSAs), which are the areas contributing most of the NPS pollution. The CSAs are the areas in a watershed where source coincides with transport factors, such as runoff, erosion, subsurface flow, and channel processes. Methods ranging from simple index-based to detailed hydrologic and water quality (HWQ) models are being used to identify CSAs. However, application of these methods for Canadian watersheds remains challenging due to the diversified hydrological conditions, which are not fully incorporated into most existing methods. The aim of this work is to review potential methods and challenges in identifying CSAs under Canadian conditions. As such, this study: (a) reviews different methods for identifying CSAs; (b) discusses challenges and the current state of CSA identification; and (c) highlights future research directions to address limitations of currently available methods. It appears that applications of both simple index-based methods and detailed HWQ models to determine CSAs are limited in Canadian conditions. As no single method/model is perfect, it is recommended to develop a ‘Toolbox’ that can host a variety of methods to identify CSAs so as to allow flexibility to the end users on the choice of the methods.

show abstract

“…The underlying basis for the simulation experiment was a calibrated eco-hydrological model by using the Soil and Water Assessment Tool (SWAT) for the Warnow river basin and its sub-basins. Details of the model development and simulation results are published in Bauwe et al [27]. The simulated annual area-weighted TP loads for each catchment were taken from the model output and compared with measured data.…”

Section: Catchment Modelingmentioning

confidence: 99%

Impact of Filters to Reduce Phosphorus Losses: Field Observations and Modelling Tests in Tile-Drained Lowland Catchments

Bauwe¹,

Kahle²,

Lennartz³

2019

Water

Self Cite

View full text Add to dashboard Cite

In this study, we analyzed Dissolved Reactive Phosphorus (DRP) and Total Phosphorus (TP) concentration dynamics over two years in surface waters of five nested catchments in northeastern Germany. Based on this, we constructed a filter box filled with iron-coated sand for Phosphorus (P) removal at the edge of a tile-drained field. Results of the filter box experiment were used for a model scenario analysis aiming at evaluating the P removal potential at catchment scale. DRP and TP concentrations were generally low but they exceeded occasionally target values. Results of the filter box experiment indicated that 28% of the TP load could be retained but the DRP load reduction was negligible. We assume that DRP could not be reduced due to short residence times and high flow dynamics. Instead, particulate P fractions were probably retained mechanically by the filter material. The scenario analysis revealed that the P removal potential of such filters are highest in areas, in which tile drainage water is the dominant P source. At a larger spatial scale, in which other P (point) sources are likewise important, edge-of-field P filters can only be one part of an integrated catchment strategy involving a variety of measures to reduce P losses.

show abstract

Predicting dissolved reactive phosphorus in tile-drained catchments using a modified SWAT model

Cited by 23 publications

References 37 publications

Combined Approaches to Predict Microplastic Emissions Within an Urbanized Estuary (Warnow, Southwestern Baltic Sea)

Combined Approaches to Predict Microplastic Emissions Within an Urbanized Estuary (Warnow, Southwestern Baltic Sea)

Currents Status, Challenges, and Future Directions in Identifying Critical Source Areas for Non-Point Source Pollution in Canadian Conditions

Impact of Filters to Reduce Phosphorus Losses: Field Observations and Modelling Tests in Tile-Drained Lowland Catchments

Contact Info

Product

Resources

About