Author: Kara Lynn Greenley MarrPublisher:
ISBN:
Category : Ecosystem management
Languages : en
Pages : 240
Book Description
Seasonal and Spatial Phosphorus Trends in the Minnesota River Basin
Author: Kara Lynn Greenley MarrPublisher:
ISBN:
Category : Ecosystem management
Languages : en
Pages : 240
Book Description
Phosphorus in the Minnesota River
Author: Publisher:
ISBN:
Category : Minnesota River (S.D. and Minn.)
Languages : en
Pages : 12
Book Description
Phosphorus Retention by Soils and Suspended Sediments in the Minnesota River Basin
Author: Feng FangAnalysis of Phosphorus Trends and Evaluation of Sampling Designs in the Quinebaug River Basin, Connecticut
Author: Elaine C. Todd TrenchPublisher: DIANE Publishing
ISBN:
Category : Government publications
Languages : en
Pages : 28
Book Description
Phosphorus Trends in the Upper Mississippi Basin
Author: Sharon Elizabeth KroeningPublisher:
ISBN:
Category : Water
Languages : en
Pages : 440
Book Description
A Spatial Analysis of Phosphorus in the Mississippi River Basin
Author: Linda M. JacobsonPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Phosphorus (P) in rivers and streams in the Mississippi River Basin (MRB) is a contributing nutrient to hypoxia in the Gulf of Mexico and impacts local water quality. Although nitrogen has been extensively studied and attributed to be the main nutrient causing the Gulf hypoxic zone, P has increasingly been recognized as having more of an effect than was previously thought. The primary inputs of P to rivers and streams are through surface runoff or tile drainage from agricultural fields and from point sources, primarily sewage effluent. The objective of this study was to analyze the spatial pattern of P inputs and outputs in the MRB as they relate to riverine P yields to the Gulf of Mexico and to determine the counties in the MRB that have the highest yields of P and the most critical factors causing this P loss. A database of factors contributing P to the environment was constructed for each county in the MRB from 1997 through 2006 including data on fertilizer application, major crop acreage and harvest, animal numbers for manure inputs and human population. Landscape and climate characteristics of tile drainage, soil characteristics, slope and precipitation were also included. Riverine yields of total P (TP), dissolved reactive P (DRP) and particulate P (PP) for 113 watersheds within the MRB were related to these factors to create multiple regression and spatial error regression models to predict P yields throughout the basin. The fraction of the land planted in crops, sewage effluent P inputs and precipitation were found to best predict TP yields with a spatial error model (R2=0.47). Dissolved reactive P yields were predicted by fertilizer P inputs, sewage effluent P inputs and precipitation in a multiple regression model (R2=0.46), whereas PP yields were explained by crop fraction, sewage effluent P inputs and soil bulk density in a spatial error regression model (R2=0.499). Inputs of P from animal manure were not found to be significant in any model predicting P yields, which contrasts with the results of the USGS SPARROW model. Overall, the Cornbelt region of the upper Midwest, where there is a large amount of cropland and fertilizer application, had the counties with the greatest P yields. This analysis of P in the MRB helps to point out specific areas where P reductions are needed to limit the occurrence of Gulf hypoxia and improve local water quality.
Differences Between Farmer and Agency Attitudes Regarding Policies to Reduce Phosphorous Pollution in the MInnesota River Basin
Author: Laura Mary Joy McCannPublisher:
ISBN:
Category : Agricultural pollution
Languages : en
Pages : 36
Book Description
Evaluating Transaction Costs of Alternative Policies to Reduce Agricultural Phosphorus Pollution in the Minnesota River
Author: Laura Mary Joy McCannPublisher:
ISBN:
Category :
Languages : en
Pages : 428
Book Description
Dried Milk. Determination of Moisture Content (Reference Method)
Author: British Standards Institute StaffPublisher:
ISBN: 9780580439339
Category :
Languages : en
Pages : 32
Book Description
Water, Quality, Water testing, Water resources, Seawater, Effluents (sewage), Industrial water pollutants, Chemical analysis and testing, Determination of content, Phosphorus, Phosphates, Orthophosphates, Polyphosphates, Spectrophotometry, Solvent extraction methods
Diffuse Pollution '98
Author: Vladimir NovotnyPublisher: IWA Publishing (International Water Assoc)
ISBN:
Category : Medical
Languages : en
Pages : 414
Book Description
Diffuse Pollution of surface, coastal and ground waters is a major environmental and economic problem in the world today. Unlike point source pollution, which has to some extent been controlled by developments in technology and regulation, diffuse pollution is difficult to control, requiring the application of technological and socio-economical approaches and of education. The 46 papers in these proceedings have been selected from those presented at the 3rd International Conference on Diffuse Pollution, which addressed urban and rural diffuse pollution problems and solutions as experienced in several countries. The papers are divided into five themes: Identification of sources and loads Best Management Practices Receiving water impacts Modelling diffuse pollution Watershed management. The proceedings conclude with two papers, prepared by prominent specialists, that summarise the key findings at the conference. These proceedings will prove an essential resource for all concerned, whether as researchers, regulators or practioners, with diffuse pollution and its control.