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An Evaluation Of Soil Phosphorus Storage Capacity Spsc At Proposed Wetland Restoration Locations In The Western Lake Erie Basin
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Book Synopsis An Evaluation of Soil Phosphorus Storage Capacity (SPSC) at Proposed Wetland Restoration Locations in the Western Lake Erie Basin by : Jacob F. Berkowitz
Download or read book An Evaluation of Soil Phosphorus Storage Capacity (SPSC) at Proposed Wetland Restoration Locations in the Western Lake Erie Basin written by Jacob F. Berkowitz and published by . This book was released on 2021 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating Soil Phosphorus Storage Capacity in Constructed Wetlands by : Christine M. VanZomeren
Download or read book Evaluating Soil Phosphorus Storage Capacity in Constructed Wetlands written by Christine M. VanZomeren and published by . This book was released on 2020 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Dynamics in Restored Riparian Wetlands on Former Agricultural Land in Vermont by : Adrian Robert Hendrick Wiegman
Download or read book Phosphorus Dynamics in Restored Riparian Wetlands on Former Agricultural Land in Vermont written by Adrian Robert Hendrick Wiegman and published by . This book was released on 2022 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: Wetland restoration has numerous potential ecological and societal benefits, one of which is the retention of phosphorus (P) and consequent protection of downstream water bodies from eutrophication. Past studies focused on influents to and effluents from a variety of wetland types have documented net P retention. However, some wetland systems are less effective at P capture and wetland P retention capacity can change over time. Certain wetland types - especially riparian wetlands restored on former agricultural land - remain understudied. In Vermont, most of the over 4000 potential wetland restoration sites in the Lake Champlain Basin are located on current or former agricultural fields, and little information is available to inform estimates of net P retention (i.e., P balances) for such sites. In this dissertation, I examined various factors affecting P balances in riparian wetlands restored on historically farmed soils of Vermont. P balance in a riparian wetland is largely a function of particulate P capture (e.g., deposition of particle-attached P during floods) and soluble reactive P (SRP) loss (e.g., release of SRP from soils). In Chapter 1, I determined the threshold in P saturation ratio (PSR) for riparian soils in Vermont, enabling calculation of a soil P storage capacity (SPSC) metric. I then quantified soil SRP release using intact soil core incubations with simulated floods for sites ranging from active farms to mature wetlands and confirmed that PSR, SPSC, and other soil parameters were strong predictors of SRP loss during inundation. In Chapter 2, I monitored P dynamics in soil, water, and vegetation at three restored riparian wetlands on former agricultural land in the Lake Champlain Basin, focusing on factors that affect P deposition and SRP release. At wetland sampling plots, observed inorganic sediment gain and decreased water column total suspended solids concentrations relative to the river/inflow indicated that wetlands were effectively trapping particles. Accretion of inorganic P (i.e., best estimate for mineral P deposited during floods) ranged from 0.1 to 1 g P m-2 yr-1 depending on site and elevation. Elevated SRP concentrations in wetland water columns relative to the river sources indicated internal SRP release from soils, and high frequency data indicated that factors such as temperature, dissolved oxygen, and primary production likely influence SRP dynamics. In Chapter 3, I developed a wetland P dynamics model that can generate estimates of net P retention from a simple set of soil and hydrologic inputs, considering both P deposition and SRP release. For proof of concept, I simulated the wetlands monitored in Chapter 2 using two years of monitoring data and a set of model scenarios. I found that net total P balance was typically positive (-0.04 to 0.24 g P m-2 yr-1), with average P retention efficiency of ~40%, though there was substantial variability depending on site and scenario. P retention efficiency was especially sensitive to changes in influent P and total suspended solids concentrations, with the greatest net P retention predicted for systems receiving influent floodwater with high P concentrations. Reduction of influent SRP concentrations promoted SRP release from soils, suggesting that legacy soil P in the wetlands might cause a time lag between the adoption of upstream best management practices and reduction in downstream SRP concentrations. In the future, the model developed in Chapter 3 can be applied more broadly to investigate the potential P retention benefits of wetland restoration at candidate sites across Vermont. Together, the information put forth by this dissertation provides a suite of data and tools that researchers and managers can use to enhance the P retention benefits of riparian wetland restoration.
Book Synopsis Levels of Plant Available Phosphorus in Agricultural Soils in the Lake Erie Drainage Basin by : Terry J. Logan
Download or read book Levels of Plant Available Phosphorus in Agricultural Soils in the Lake Erie Drainage Basin written by Terry J. Logan and published by . This book was released on 1977 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Storage Dynamics in Wetland Vegetation and Forage Grass Species by : Jeffrey D. Smith
Download or read book Phosphorus Storage Dynamics in Wetland Vegetation and Forage Grass Species written by Jeffrey D. Smith and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Nutrient export from agricultural activities in the Lake Okeechobee watershed has contributed to eutrophication of the Lake and regulatory implementation of a phosphorus (P) Total Maximum Daily Load (TMDL) rule. Historically, anthropogenic manipulation of hydrology lowered water tables, creating improved conditions for upland forage grass production. This action also increased runoff rates and P loading to the Lake. Hydrologic restoration of historically isolated wetlands within the watershed is a proposed best management practice (BMP) to increase P retention capacities of these wetlands. However, longer hydroperiods could potentially decrease pasture productivity, and as a consequence, adversely affect the economic viability of the cattle industry in the region. Previous studies have shown that soils under longer hydroperiods in the Okeechobee watershed have greater P storage potential than surrounding upland soils. This research primarily focuses on the vegetative component of P storage in pasture wetlands. The objectives were to evaluate biomass production and P storage dynamics in vegetation under various hydroperiods and to determine the efficacy of using an alternative forage grass species to maintain pasture productivity after wetland restoration. Four isolated wetlands in Okeechobee County, Florida were sampled in November, 2004, March, 2005 and July 2005. In this study, total P storage in wetlands (with a 50 m upland buffer) included soil (10cm depth), below ground biomass (BGB), above ground biomass (AGB) and litter components.
Book Synopsis Predicting Soil Phosphorus Storage in Historically Isolated Wetlands Within the Lake Okeechobee Priority Basins by : Kathleen A. McKee
Download or read book Predicting Soil Phosphorus Storage in Historically Isolated Wetlands Within the Lake Okeechobee Priority Basins written by Kathleen A. McKee and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These findings support the idea of hydrologic restoration as a useful management practice to reduce P loads to surface waters. The landscape-scale predictive model will help land managers target high P areas and estimate the effectiveness of future hydrological restoration efforts.
Book Synopsis Evaluating the Impacts of Climate and Stacked Conservation Practices on Nutrient Loss from Legacy Phosphorus Agricultural Fields by : Rachelle Leah Crow
Download or read book Evaluating the Impacts of Climate and Stacked Conservation Practices on Nutrient Loss from Legacy Phosphorus Agricultural Fields written by Rachelle Leah Crow and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Agricultural nutrient loss in the Western Lake Erie Basin (WLEB) leads to elevated nutrient levels in Lake Erie, resulting in harmful algal blooms and anoxic conditions, decreased fish populations, and reduced recreation and tourism revenues. To combat this issue, the Ohio Phosphorus Task Force set a goal to decrease the phosphorus (P) load to the WLEB by 40% from 2008 spring loads. To meet this goal, efforts are underway to minimize the amount of P transported from agricultural fields to surface water using best management practices (BMPs). While many BMPs aim to decrease P loss by optimizing agricultural nutrient usage, some fields continue to have elevated soil test phosphorus (STP) levels even when nutrients have not been applied for decades. These fields, referred to as legacy P fields, contain more P within the soil profile than agronomically necessary and have substantial nutrient runoff potential. Because these sites disproportionately contribute to nutrient runoff, it is important to determine what variables impact and how best to manage nutrient loss from legacy P fields. Rainfall depth and intensity have been identified as driving factors causing P runoff from fields within agronomic STP levels. Better knowledge of the impact of precipitation and temperature on runoff from legacy P fields will improve management to minimize nutrient loss from these unique settings. This is especially valuable information as production and water quality management adaptations are made in reaction to climate change. To determine how weather variability impacts P runoff from legacy P fields, water quality and water quantity data was collected at 11 fields with Mehlich-3 P STP > 100 mg/kg in northwest Ohio for a total of 18.5 site-years, during which time 477 storm events each with > 6.35 mm (0.25 in) of precipitation were monitored. This study found that average nutrient concentrations within tile discharge from legacy P fields were 2.4 times (total P; TP) and 4-5 times (dissolved reactive P; DRP) larger than the equivalent on fields with agronomically appropriate STP (i.e., agronomic fields). Additionally, legacy P fields behaved similarly to agronomic fields during precipitation events: rainfall amount was the primary climatic variable affecting TP and DRP loads while tile discharge and nitrate loads were both largely affected by rainfall amount and event duration. By addressing fundamental questions about interactions between elevated STP fields, climate, and nutrient transformation and transport, this study provides greater insight to the significance of legacy P fields on water quality issues and therefore informs decisions on BMP selection and design. Stacked BMPs on fields with high nutrient loss potential are hypothesized to improve quality of runoff more than non-targeted or single practices. To measure the effectiveness of stacked conservation practices on a legacy P field, this study analyzed nutrient loss from a western Ohio field for nearly two years. The targeted subsurface tile drained 4.5 ha (11.1 acres) of the field to the first BMP, a ditch-style P removal structure (PRS) filled with electric arc furnace steel slag. The effluent from the PRS then discharged into a second BMP: a constructed wetland. Discharge moving through the stacked practices was monitored with bubbler flow meters and area velocity sensors and water samples were collected using automated water samplers at the inflows and outflows of each BMP. Between the inlet and outlet of the PRS, there was a 27% reduction in TP concentration and an 18% increase in DRP concentration. The wetland produced statistically significant and consistent reductions of TP loading and DRP loading by 30% and 18%, respectively. Although the PRS did not perform as designed, the stacked PRS and wetland in series had overall load reductions of TP (36%) and DRP (18%). The analysis of these stacked practices demonstrates that although one of the two BMPs performed poorly, there is a benefit to redundant designs, which provides insight on how to best implement BMPs on agricultural lands.
Book Synopsis Quantitative Approach for Assessment of Phosphorus Loss Risk from Alaquod and Paleudult Soil Profiles by : Debolina Chakraborty
Download or read book Quantitative Approach for Assessment of Phosphorus Loss Risk from Alaquod and Paleudult Soil Profiles written by Debolina Chakraborty and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Phosphorus (P) transported from agricultural fields can be a major contributor to eutrophication of aquatic systems. Sandy soils have higher risk of P loss because of limited P retention capacity. Vertical movement of P through the soil profile results in its contact with Bh horizons of Alaquods and Bt horizons of Paleudults which may act as P sinks. The purpose of this study was to evaluate a new tool, the ''safe'' soil P storage capacity (SPSC), based on a threshold P saturation ratio (PSR) value, to quantitatively assess P release potential from fertilizer-impacted Alaquod- and Paleudult- soil profiles which are of extensive occurrence in the SE United States coastal plain. Soil samples from Alaquod and Paleudult sites located within Florida were sampled by horizon. The SPSC calculated from P, Fe and Al using oxalate extractant was related to water-soluble P and equilibrium P concentrations (EPC0) obtained from traditional Langmuir isotherms. Plant P availability was determined using iron-oxide impregnated filter paper (FeO-P).
Book Synopsis Levels of Plant Available Phosphorus in Agricultural Soils in the Lake Erie Drainage Basin by :
Download or read book Levels of Plant Available Phosphorus in Agricultural Soils in the Lake Erie Drainage Basin written by and published by . This book was released on 1977 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Phosphorus has been identified as the nutrient element most limiting to the growth of algae in Lake Erie. In addition, nutrient loadings by tributaries are a major source of phosphorus to the lake; of this load, the diffuse load, and especially the agricultural diffuse load is a major component of the total P input to Lake Erie. The particulate P load carried by a stream has several sources: native soil P, P from fertilizer, manure, and waste, P from crop residues and detritus. The bulk of sediment-P, however, is native soil P except where additions of manure have been heavy over many years. In light of these issues, a study was initiated to investigate levels of available-P in agricultural soils in the Lake Erie drainage basin. This report is concerned with two major objectives: (1) To survey actual field levels of available P in a county in Ohio and compare these with published soil test summary data for the same area; and (2) to determine if similar data were available in other Lake Erie Basin states and to determine if soil test methods and recommendations varied significantly from state to state. (Author).
Book Synopsis Historical Contributions of Phosphorus from Natural and Agricultural Sources and Implications for Stream Water Quality, Cheney Reservoir Watershed, South-central Kansas by : Larry M. Pope
Download or read book Historical Contributions of Phosphorus from Natural and Agricultural Sources and Implications for Stream Water Quality, Cheney Reservoir Watershed, South-central Kansas written by Larry M. Pope and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis White Phosphorus Wetland Storage Installation Assessment Report by : John W. Simmers
Download or read book White Phosphorus Wetland Storage Installation Assessment Report written by John W. Simmers and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis White Phosphorus Wetland Storage Installation Assessment Report by : John W. Simmers
Download or read book White Phosphorus Wetland Storage Installation Assessment Report written by John W. Simmers and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis White Phosphorus Wetland Storage Installation Assessment Report by : John W. Simmers
Download or read book White Phosphorus Wetland Storage Installation Assessment Report written by John W. Simmers and published by . This book was released on 1993 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Management in the Lake Erie Basin by : International Joint Commission. Lake Erie Regulation Study
Download or read book Phosphorus Management in the Lake Erie Basin written by International Joint Commission. Lake Erie Regulation Study and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Phosphorus Analysis of Major Soil Series Samples from the Lake Erie Drainage Basin by : Terry J. Logan
Download or read book Phosphorus Analysis of Major Soil Series Samples from the Lake Erie Drainage Basin written by Terry J. Logan and published by . This book was released on 1987 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Soil Factors Controlling Phosphorus Concentration in Runoff from Agricultural Soils in the Lake Champlain Basin by : Frederick R. Magdoff
Download or read book Evaluation of Soil Factors Controlling Phosphorus Concentration in Runoff from Agricultural Soils in the Lake Champlain Basin written by Frederick R. Magdoff and published by . This book was released on 1997 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Biological Availability of Total Phosphorus by : Terry J. Logan
Download or read book Biological Availability of Total Phosphorus written by Terry J. Logan and published by . This book was released on 1979 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper discusses the bioavailability of Lake Erie tributary sediment phosphate as determined by chemical extraction and algal uptake. This report includes the following: (1) Review of the literature on procedures to estimate biologically available sediment phosphate (BSP) including sequential chemical extraction, resin extraction, P desorption and various algal bioassay techniques; (2) Sequential chemical extraction of P from suspended sediments in Lake Erie drainage Basin tributaries; (3) Algal uptake of sediment P from several suspended sediments from Lake Erie Basin tributaries; (4) Conclusions from the project studies; and (5) Extrapolation and implications for the Lake Erie Basin. (Author).
