A universal method to assess the potential of phosphorus loss from soil to aquatic ecosystems

Pöthig, Rosemarie; Behrendt, Horst; Opitz, Dieter; Furrer, Gerhard

doi:10.1007/s11356-009-0230-5

Cited by 63 publications

(80 citation statements)

References 35 publications

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“…We used IROWC_P estimates of water soluble P to estimate the degree of P saturation, then estimated equilibrium P concentrations (EPC 0 ) using equations of Pothig et al (2010). The resulting estimate of EPC 0 was 0.01 mg P L −1 .…”

Section: Modellingmentioning

confidence: 99%

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Phosphorus dynamics across intensively monitored subcatchments in the Beaver River

Baulch

Futter²,

Jin

et al. 2013

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We report results from a spatially intensive monitoring and modelling study to assess phosphorus (P) dynamics in the Beaver River, a tributary of Lake Simcoe, Ontario. We established multiple monitoring stations (9 flow and 24 water quality stations) from headwaters to near the outflow that were operated for 2 field seasons, complementing longer term data from a flow monitoring site and water chemistry monitoring site. We applied the Branched-INCA-P model, which allows fully distributed simulations supported by highly distributed monitoring data. Using spatially distributed data helped better understand variable P and sediment dynamics across the catchment and identify key model uncertainties and uncertainties related to catchment P management. Measured and modelled total P concentrations often exceeded provisional water quality thresholds in many areas of the catchment and highlight the value of studying water quality across multiple subcatchments rather than at a single site. Total P export coefficients differed widely among subcatchments, ranging from 2.1-21.4 kg km −2 y −1 over a single year. Export coefficients were most strongly (negatively) related to the proportion of wetland cover in subcatchments. The INCA-P model captured spatial variation in P concentrations relatively well, but short-term temporal variability in the observed data was not well simulated across sites, in part due to unmodelled hydrological phenomena including beaver activity and unknown drivers of P peaks that were not associated with hydrological events.

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Section: Modellingmentioning

confidence: 99%

“…These data were used to estimate equilibrium phosphorus concentrations using published equations (Pothig et al 2010). …”

Section: Observed Datamentioning

confidence: 99%

Phosphorus dynamics across intensively monitored subcatchments in the Beaver River

Baulch

Futter²,

Jin

et al. 2013

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“…Soils from areas which varied highly in land use and soil type were investigated regarding DPS as well as EPC 0 and water-soluble phosphorus (WSP) as indicators for the potential of phosphorus loss. DPS, which reflects the actual state of phosphorus fertilization of soil, can be calculated from the easily accessible parameter WSP (Pothig et al, 2010). In the sediments along the littoral zone of Lake Chaohu, the DPS values can be defined as Olsen-P/Q max , AAP/Q max and IP/Q max , and there existed significantly positive relationships between these DPS and EPC 0 values.…”

Section: > Sediments Epc 0 In Relation To Degree Of Phosphorus Saturamentioning

confidence: 99%

“…To maintain the world's vital freshwater ecosystems, the reduction of eutrophication is crucial (Pothig et al, 2010). The equilibrium phosphorus concentration (EPC 0 ) of river bed sediments has been measured for a wide range of agricultural subcatchments and main river sites to examine whether bed sediments are acting as sources or sinks of soluble reactive phosphorus (SRP).…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, phosphorus sorption behaviors were closely related to some environment variable such as the degree of phosphorus saturation (DPS) and organic matter (OM) contents. For example, the investigation of more than 400 soil samples revealed coherent relationships between DPS and EPC 0 (Pothig et al, 2010), while most of the relevant investigations were limited to soils. Besides, there were some controversies over the effects of OM on phosphorus sorption behaviors in soils.…”

Section: Introductionmentioning

confidence: 99%

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Linkage between land use patterns and sediment phosphorus sorption behaviors along shoreline of a Chinese large shallow lake (Lake Chaohu)

Zhou

Chen

et al. 2011

Knowl. Managt. Aquatic Ecosyst.

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Key-words:degree of phosphorus saturation, phosphorus sorption behavior, land use, sediment, soil To test the relationship between phosphorus buffering capacity in sediments of littoral zone and land use, seasonal samples were taken from the soils representing different patterns of land use, together with the littoral zone sediments, along shoreline in Lake Chaohu. There existed significantly positive relationships between equilibrium phosphorus concentration (EPC 0 ) and degree of phosphorus saturation (DPS) defined as ratios of Olsen-P, algae available phosphorus (AAP) and inorganic phosphorus (IP) to maximum sorption capacity (Q max ). So, some easily accessible P parameters especially DPS were indicative of EPC 0 in the sediments. Furthermore, the contents of IP, total phosphorus (TP) and organic matter (OM) in the sediments were significantly related to those in the soils. Therefore, the soils could provide the littoral zone with IP either directly or indirectly through TP input; it also provided the Olsen-P through the OM input, as evidenced by the relationship between Olsen-P and OM. It meant that the enhanced OM would enlarge the DPS. On the other hand, the increase in OM paralleled with the increases in Q max , which lower the DPS simultaneously. Thus, the OM modified sediment phosphorus sorption behaviors in complicated manners. Finally, the soil covered by Fleabane was coupled with the sediment whose EPC 0 values were lower and further decreased with strong diffusion from the soils after heavy rains. Hence, shoreline soil may input TP including IP and OM into the lake and alter the DPS together with EPC 0 thereby regulating the sediment functions to act as sink or source of phosphorus. RÉSUMÉLien entre les modes d'utilisation des terres et le comportement de sorption du phosphore des sédiments le long du littoral d'un lac peu profond en Chine (lac Chaohu) Mots-clés :degré de saturation en phosphore, comportement de sorption du phosphore, utilisation des terres, sédiments, sols Afin de tester la relation entre la capacité tampon phosphore des sédiments de la zone littorale et l'utilisation des terres, des échantillons de sols représentant différents modes d'utilisation des terres ont été prélevés saisonnièrement en même temps que des sédiments en zone littorale, le long des rives du lac Chaohu. Il existe des relations significativement positives entre la concentration de phosphore à l'équilibre (EPC) et le degré de saturation en phosphore (DPS) défini comme les ratios du Olsen-P, du phosphore disponible aux algues (PAA) et du phosphore inorganique (IP) à un maximum de capacité de sorption (Q max ). Ainsi, certains paramètres facilement accessibles du P, en particulier DPS sont indicatifs d'EPC 0 dans les sédiments. Par ailleurs, le contenu en phosphore inorganique (IP), le phosphore total (TP) et la matière organique (OM) dans les sédiments sont Article published by EDP Sciences C. Zhou et al.: Knowl. Managt. Aquatic Ecosyst. (2011) 403, 06 significativement corrélés à ceux des sols. ...

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Modelling of Nutrient Emissions in River Systems – MONERIS – Methods and Background

Venohr¹,

Hirt²,

Hofmann³

et al. 2011

International Review of Hydrobiology

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MONERIS is a semi-empirical, conceptual model, which has gained international acceptance as a robust meso-to macro scale model for nutrient emissions. MONERIS is used to calculate nitrogen (N) and phosphorus (P) emissions into surface waters, in-stream retention, and resulting loads, on a river catchment scale. This paper provides the first (i) comprehensive overview of the model structure (both the original elements and the new additions), (ii) depiction of the algorithms used for all pathways, and for retention in surface waters, and (iii) illustration of the monthly disaggregation of emissions and the implementation of measures. The model can be used for different climatic conditions, long term historical studies, and for future development scenarios. The minimum validated spatial resolution is 50 km 2 , with a temporal resolution of yearly or monthly time steps. The model considers seven emission pathways (atmospheric deposition on surface waters, overland flow, erosion, tile drainage, groundwater, emissions from sealed urban areas, and point sources), and six emission sources (natural background, fertilizer application, nitrogen atmospheric deposition on arable land and other areas, urban sources, and point sources); and these are calculated separately for different land-uses. The pathway and source-related approach is a prerequisite for the implementation of measures to reduce non-point and point-source emissions. Therefore, we have modified MONERIS by the addition of a "management alternative" tool which can identify the potential effectiveness of nutrient reduction measures. MON-ERIS is an appropriate tool for addressing the scientific and political aspects of river basin management in support of a good surface water quality.

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A universal method to assess the potential of phosphorus loss from soil to aquatic ecosystems

Abstract: These results reveal a new approach of risk assessment for P loss from soils to surface and ground waters. The consequent application of this method may globally help to save the vital resources of our terrestrial and aquatic ecosystems.

Cited by 63 publications

References 35 publications

Phosphorus dynamics across intensively monitored subcatchments in the Beaver River

Phosphorus dynamics across intensively monitored subcatchments in the Beaver River

Linkage between land use patterns and sediment phosphorus sorption behaviors along shoreline of a Chinese large shallow lake (Lake Chaohu)

Modelling of Nutrient Emissions in River Systems – MONERIS – Methods and Background

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