Threshold storm approach for locating phosphorus problem areas: An application in three agricultural watersheds in the Canadian Lake Erie basin

Zhang, B.; Shrestha, Narayan Kumar; Rudra, R. P.; Shukla, Rituraj; Daggupati, Prasad; Goel, Pradeep K.; Dickinson, W. T.; Allataifeh, Nabil

doi:10.1016/j.jglr.2019.12.003

Cited by 8 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Zhang et al [37] proposed a model to evaluate separate Agricultural Non-point Source (AGNPS) models for three diverse small agricultural watersheds in southern Ontario, Canada. The model was calibrated for runoff volume, sediment yield, and total P and executed for representative storms with increasing return periods (2-year through 100-year).…”

Section: Global Challenges Versus Local Solutions: Case Studiesmentioning

confidence: 99%

Second-Generation Phosphorus: Recovery from Wastes towards the Sustainability of Production Chains

et al. 2021

View full text Add to dashboard Cite

Phosphorus (P) is essential for life and has a fundamental role in industry and the world food production system. The present work describes different technologies adopted for what is called the second-generation P recovery framework, that encompass the P obtained from residues and wastes. The second-generation P has a high potential to substitute the first-generation P comprising that originally mined from rock phosphates for agricultural production. Several physical, chemical, and biological processes are available for use in second-generation P recovery. They include both concentrating and recovery technologies: (1) chemical extraction using magnesium and calcium precipitating compounds yielding struvite, newberyite and calcium phosphates; (2) thermal treatments like combustion, hydrothermal carbonization, and pyrolysis; (3) nanofiltration and ion exchange methods; (4) electrochemical processes; and (5) biological processes such as composting, algae uptake, and phosphate accumulating microorganisms (PAOs). However, the best technology to use depends on the characteristic of the waste, the purpose of the process, the cost, and the availability of land. The exhaustion of deposits (economic problem) and the accumulation of P (environmental problem) are the main drivers to incentivize the P’s recovery from various wastes. Besides promoting the resource’s safety, the recovery of P introduces the residues as raw materials, closing the productive systems loop and reducing their environmental damage.

show abstract

Section: Global Challenges Versus Local Solutions: Case Studiesmentioning

confidence: 99%

Second-Generation Phosphorus: Recovery from Wastes towards the Sustainability of Production Chains

et al. 2021

View full text Add to dashboard Cite

show abstract

“…While the implementation of appropriate BMPs can reduce P tot losses [17], the optimal manner to evaluate the effectiveness and viability of BMPs within a given watershed remain poorly documented [18]. Moreover, the application of non-integrated practices within a watershed can generate the majority of the P load the watershed contributes to downstream bodies of water [19,20]. Accordingly, collaborative efforts between Canada and the United States have targeted the reduction of P loads reaching Lake Erie.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of BMPs in Flatland Watershed with Pumped Outlet

Shukla,

Rudra,

Daggupati

et al. 2024

Hydrology

View full text Add to dashboard Cite

The effectiveness of existing and potential best management practices (BMPs) to cropped lands in the Jeannette Creek watershed (Thames River basin, Ontario, Canada) in reducing P loads at its pumped outlets was assessed using the Soil and Water Assessment Tool (SWAT). Existing BMPs consisted of banded, incorporated, and variable phosphorus (P)-rate application, conservation tillage, cover crops, and vegetative buffer strips. Potential BMPs consisted of banded P application, no-till, and a cover crop following winter wheat. Two separately delineated sub-watersheds, J1 and J2, characterized by a flat topography and distinct pumped outlets, were selected for analysis. Despite challenges in delineation, the SWAT model was successfully set up to assess the impact of BMPs in reducing P loads in these sub-watersheds. Each BMP was systematically removed, and the resulting simulated P loads were compared with the baseline scenario. Compared to cover crops or vegetative buffer strips, the implementation of conservation tillage and no-till, along with altering the mode of P application, offered superior effectiveness in reducing the P load. On average, the annual reduction in total P (Ptot) loads under existing BMPs was 9.2% in J1 and 11.3% in J2, whereas, under potential BMPs, this reduction exceeded 60% in both watersheds.

show abstract

“…It has been shown that the majority of NPS pollution would be exported in the late winter and early spring months [31,171,203] and, therefore, constitute hot-moments of NPS pollution export. Sampling campaigns should be effective enough to capture the variability in such important time/seasons.…”

mentioning

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

Threshold storm approach for locating phosphorus problem areas: An application in three agricultural watersheds in the Canadian Lake Erie basin

Cited by 8 publications

References 37 publications

Second-Generation Phosphorus: Recovery from Wastes towards the Sustainability of Production Chains

Second-Generation Phosphorus: Recovery from Wastes towards the Sustainability of Production Chains

Evaluation of BMPs in Flatland Watershed with Pumped Outlet

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

Contact Info

Product

Resources

About