Phosphorus dynamics during storm events in a subtropical rural catchment in southern Brazil

Bender, Marcos Antonio; Santos, Danilo Rheinheimer dos; Tiecher, Tales; Minella, Jean Paolo Gomes; Barros, Cláudia Alessandra Peixoto de; Ramon, Rafael

doi:10.1016/j.agee.2018.04.004

Cited by 39 publications

(21 citation statements)

References 37 publications

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“…The high frequency of data collection during flood event is important to understand the solute dynamics and can help to identify factors influencing dynamic processes and transport (Oeurng et al, 2010). Catchment response to rainfall vary in time and space due to several factors such as soil type, catchment size and morphology, climate and hydrology (Bender et al, 2018;Bowes et al, 2015). Storm events contribute for the major part of the annual flux for several chemical elements, such as phosphorus and dissolved organic carbon (Vidon et al, 2010;Wymore et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

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Variabilidade da resposta hidroquímica a eventos de precipitação utilizando monitoramento de alta frequência em bacias hidrográficas subtropicais, sul do Brasil

Piazza¹,

Dupas²,

Gascuel-Odoux³

et al. 2020

REGA

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Section: Introductionmentioning

confidence: 99%

“…Agriculture in these regions is generally located in fragile environment, either due to mountainous relief or shallow soils, with frequent runoff and subsurface flow pathways. Besides that, crop production in these regions usually do not follow agronomic recommendations regarding environmental protection (Bender et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Variabilidade da resposta hidroquímica a eventos de precipitação utilizando monitoramento de alta frequência em bacias hidrográficas subtropicais, sul do Brasil

Piazza¹,

Dupas²,

Gascuel-Odoux³

et al. 2020

REGA

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“…Therefore, the diffuse flow may not reach the rivers and cause problems with river contamination. However, it should be noted that if we consider this concentration of P soluble in watercourses, according to Resolution of CONAMA (2005) for Class I freshwaters, the values are at least four times higher than that allowed by legislation, as found by BENDER et al (2018). The soluble form of the nutrients, P, K, Ca, and Mg is the form in which they will be available in the aqueous environment and may trigger new reactions or processes (TANG et al, 2019).…”

Section: Chemical Characterisation and Concentration Of Nutrients In mentioning

confidence: 98%

Losses of water, soil, and nutrients during high-intensity simulated rainfall in two soil management systems different sources of fertilization

Lemos¹,

Cassol

Barros

2020

Cienc. Rural

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The goal of this study was to quantify the water, soil, and soluble nutrient losses during high-intensity rainfall simulated in two soil preparation systems with four sources of fertilization. Forty-five days after the corn seeding, a 120 mm h-1 intensity rainfall was simulated during 90 min in field plots with conventional tillage (CT) or no-tillage (NT). Each system had four repetitions with the fertilizer treatments, including without fertilization, mineral, urban waste compost (UWC), and pig slurry. P, K, Ca, and K concentrations were measured in soluble form, in addition to electrical conductivity, pH, water, and soil losses. As expected, the greatest soil losses occurred with CT; however, the greatest water losses occurred with NT. Among the fertilizers, UWC was more efficient because it had the highest infiltration rates. The concentrations of P, K, Ca, and Mg did not exhibit any interaction between fertilization and soil tillage treatments. K was the nutrient that presented the greatest losses (kg ha-1) at the end of the simulated rainfall because of the highest concentrations (mg L-1) added to high runoff coefficients of 45% for CT and 77% for NT. Thus, the evaluated system with cover crops and minimum soil tillage was not sufficient to control nutrient transfer in the soluble form during intense rainfall events.

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“…For example, crop fertilization significantly increases nitrogen loads in watersheds and increases the risk of total nitrogen loss [14,15]. In addition, land use/land cover (LULC) changes affect the form and intensity of NPS pollution [16,17]. The high diversity of LULC results in different degrees of soil fertility and underlying surface properties, and these factors would directly affect the amount of NPS pollution and the form of loss [13,18,19].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Different Forest Characteristics on Non-point Source Pollution: A Case Study at Chaohu Basin, China

Cheng

Lin

Wang

et al. 2020

IJERPH

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Forestland is a key land use/land cover (LULC) type that affects nonpoint source (NPS) pollution, and has great impacts on the spatiotemporal features of watershed NPS pollution. In this study, the forestland characteristics of the Chaohu Basin, China, were quantitatively represented using forestland types (FLTs), watershed forest coverage (WFC) and forest distance from the river (DFR). To clarify the impact of forests on NPS pollution, the relationship between forestland characteristics and watershed nutrient outputs (TN and TP) was explored on a monthly scale using SWAT (Soil and Water Assessment Tool) and the period simulation was 2008–2016. The results showed that: (1) the TN and TP showed similar output characteristics and the rainy season was the peak period of nitrogen and phosphorus output. (2) Among the forestland characteristics of forestland types, watershed forest coverage and forest distance from the river, watershed forest coverage and forest distance from the river had greater effects than forestland types on the control of watershed nutrient outputs (TN and TP). (3) In different forestland types, the watershed nutrient outputs intensity remained at the lowest level when the FLTs was mixed forest, with a TN output of 1244.73kg/km2 and TP output of 341.39 kg/km2. (4) The watershed nutrient outputs and watershed forest coverage were negatively correlated, with the highest watershed forest coverage (over 75%) reducing the TN outputs by 56.69% and the TP outputs by 53.46% compared to the lowest watershed forest coverage (below 25%), it showed that in areas with high forest land coverage, the non-point source pollution load in the watershed is smaller than in other areas. (5) forest distance from the river had an uncertain effect on the TN and TP output of the basin, the forestland itself is a source of pollution, but it also has the function of intercepting pollution movement; the forest distance from the river in the range of 500–1000 m had the lowest NPS pollution. Considering the different forest characteristics and topographical factors, an optimal allocation mode of differentiated forest land was proposed, these suggestions will provide a scheme for surface source pollution prevention and control in the basin. This research gap is the basis of real forestland optimization. We may optimize the forestland layout for NPS pollution prevention and control by clarifying the internal mechanism.

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Phosphorus dynamics during storm events in a subtropical rural catchment in southern Brazil

Cited by 39 publications

References 37 publications

Variabilidade da resposta hidroquímica a eventos de precipitação utilizando monitoramento de alta frequência em bacias hidrográficas subtropicais, sul do Brasil

Variabilidade da resposta hidroquímica a eventos de precipitação utilizando monitoramento de alta frequência em bacias hidrográficas subtropicais, sul do Brasil

Losses of water, soil, and nutrients during high-intensity simulated rainfall in two soil management systems different sources of fertilization

The Influence of Different Forest Characteristics on Non-point Source Pollution: A Case Study at Chaohu Basin, China

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