Relationships between stream phosphorus concentrations and drainage basin characteristics in a watershed with poultry farming

Cox, Trevor J.; Engel, Bernard A.; Olsen, Roger; Fisher, J. Berton; Santini, Andrew D.; Bennett, Brian J.

doi:10.1007/s10705-013-9569-6

Cited by 11 publications

(11 citation statements)

References 19 publications

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“…Geometric mean P concentrations varied across the streams draining the LWW, showing that 70% of the variability in P concentrations was explained by HDI (Figure 3B). These relationships between stream TP concentrations and HDI, like TN, have been observed across the region (e.g., see Haggard et al 2003; Cox et al 2013), reflecting potential TP sources such as poultry litter applied to pastures (DeLaune et al 2004; Cox et al 2013). The regression lines provide a realistic water quality target to which P concentrations might be reduced (without conversion to forest) and show sites that deviate greatly from concentrations at a given HDI.…”

Section: Resultsmentioning

confidence: 87%

“…This is why stream nutrient concentrations (from individual samples to annual means) are often positively correlated to the proportion of agricultural lands (sum of % crop, % pasture, and % grassland) and urban development (sum of % developed open‐space, and % low, medium, and high intensity development) in the watershed. This relationship has been documented across the nation (Byron and Goldman 1989; Jordan et al 1997; Jones et al 2001; Howarth et al 2002; Haggard et al 2003; Toland et al 2012; Cox et al 2013; Giovannetti et al 2013).…”

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confidence: 85%

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Water Chemistry During Baseflow Helps Inform Watershed Management: A Case Study of the Lake Wister Watershed, Oklahoma

Austin

Patterson²,

Haggard³

2018

Contemporary Water Research

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Nonpoint source (NPS) pollution from agricultural and urban development is a primary source of nutrients and decreased water quality in aquatic systems. Installation of best management practices (BMPs) within critical source areas of the watershed can be helpful at reducing the transport of nutrients to waterbodies; however, prioritizing these areas may be difficult. The objective of this study was to develop several potential frameworks for prioritizing subwatersheds using baseflow water chemistry data in relation to a simple human development index (HDI; total percent agriculture and urban development). At a monthly interval, samples were collected at 26 sites throughout the Oklahoma portion of the Lake Wister Watershed (LWW) and analyzed for total nitrogen, total phosphorus, total suspended solids, and chlorophyll a. Changepoint analysis for each parameter found significant thresholds for each of the parameters ranging from 20 to 30% HDI. Changepoint analysis summary statistics were used to develop prioritization frameworks for the LWW that could be used to target subwatersheds where BMP installation would have the greatest effect at improving water quality. Additionally, regression models developed from the relationships between water quality parameters and HDI values serve as realistic targets for improving water quality, with the modeled line representing the target concentration for a given HDI value. After BMPs have been implemented, baseflow monitoring should continue at the subwatershed scale to track changes in water quality. Focusing monitoring efforts at the subwatershed scale will provide an earlier indication of the effectiveness of BMPs, as it may take several decades to detect improvements in water quality at the larger watershed scale.

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Section: Resultsmentioning

confidence: 87%

mentioning

confidence: 85%

Water Chemistry During Baseflow Helps Inform Watershed Management: A Case Study of the Lake Wister Watershed, Oklahoma

Austin

Patterson²,

Haggard³

2018

Contemporary Water Research

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show abstract

“…We know that nutrient concentrations in baseflow increase with anthropogenic influence within the catchment (Haggard et al, 2003(Haggard et al, , 2007Brion et al, 2010;Cox et al, 2013;Giovannetti et al, 2013). However, the landscape factors that likely are responsible for increased nutrients during baseflow also influence catchment hydrology.…”

Section: Watershed Management Using Baseflow Nutrient Concentrationsmentioning

confidence: 99%

Can We Manage Nonpoint‐Source Pollution Using Nutrient Concentrations during Seasonal Baseflow?

McCarty

Haggard

2016

Agricultural & Env Letters

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Core Ideas Nutrient concentrations in streams are positively correlated during baseflow and runoff conditions. High nutrient concentrations at baseflow suggest high nutrient loads from nonpoint sources. Manage nonpoint sources by targeting subwatersheds with elevated nutrient concentrations during baseflow. Focusing on baseflow conditions frees up resources to monitor water quality more broadly across watersheds. Nationwide, a substantial amount of resources has been targeted toward improving water quality, particularly focused on nonpoint‐source pollution. This study was conducted to evaluate the relationship between nutrient concentrations observed during baseflow and runoff conditions from 56 sites across five watersheds in Arkansas. Baseflow and stormflow concentrations for each site were summarized using geometric mean and then evaluated for directional association. A significant, positive correlation was found for NO3–N, total N, soluble reactive P, and total P, indicating that sites with high baseflow concentrations also had elevated runoff concentrations. Those landscape factors that influence nutrient concentrations in streams also likely result in increased runoff, suggesting that high baseflow concentrations may reflect elevated loads from the watershed. The results highlight that it may be possible to collect water‐quality data during baseflow to help define where to target nonpoint‐source pollution best management practices within a watershed.

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“…Thus, poultry litter use as plant nutrients becomes an interesting economic alternative for partial replenishment of mineral fertilizers in the nearby croplands (Bolan et al, 2010;Lourenço et al, 2013). On the other hand, the indiscriminate disposal of this residue with no technical support may cause environmental pollution, especially to groundwater and rivers (Cox et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Composition of Poultry Litter in Southern Brazil

Rogeri

Ernani

Mantovani

et al. 2016

Rev. Bras. Ciênc. Solo

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ABSTRACT:Determining the chemical composition of poultry litter is important in order to apply this waste as soil fertilizer without causing negative environmental impacts. The aim of this study was to evaluate the average and variability of some chemical parameters of 165 samples of poultry litter produced from confined animal production facilities located in the states of Santa Catarina and Rio Grande do Sul, Southern of Brazil. Samples of approximately 5.0 L were collected on 20 points from the truck at the time the material was unloaded into the application sites. Subsequently, they were oven-dried at 65 °C and analyzed. Values of pH in water, dry matter, N, P and K were determined in all samples; N soluble in water (soluble-N), ammonium (NH + 4 -N) and nitrate (NO − 3 -N) were quantified in 50 samples; organic carbon (organic-C) and C/N ratio were assessed in 20 samples. There was large variation in the contents of N, P 2 O 5 and K 2 O among samples, with the average accounting for 2.2, 3.0 and 2.9 %, respectively; these nutrients correlated with each other. More than 90 % of the N was in the organic form, into which the fraction soluble in water accounted for 21.8 % of the total. Inorganic N was predominantly in the form of ammonium (NH + 4 -N), and nitrate (NO − 3 -N) was absent. Average dry matter was 64.3 %, with a median of 66.5 %; pH was always alkaline (average of 7.8), with a low variation coefficient (7.4 %), and was negatively correlated with NH + 4 -N. The average of organic C and C/N ratio in dry matter was 28.3 % and 11.2, respectively, which results in the immediate release of N to the soil, with no microorganism immobilization. The chemical composition of poultry litters produced in confined systems in Southern Brazil is widely variable. Thus, to be successfully used as soil fertilizer, it is essential to know their composition, mainly in terms of moisture N, P 2 O 5 and K 2 O contents.

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Relationships between stream phosphorus concentrations and drainage basin characteristics in a watershed with poultry farming

Cited by 11 publications

References 19 publications

Water Chemistry During Baseflow Helps Inform Watershed Management: A Case Study of the Lake Wister Watershed, Oklahoma

Water Chemistry During Baseflow Helps Inform Watershed Management: A Case Study of the Lake Wister Watershed, Oklahoma

Can We Manage Nonpoint‐Source Pollution Using Nutrient Concentrations during Seasonal Baseflow?

Composition of Poultry Litter in Southern Brazil

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