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  • 1
    Online Resource
    Online Resource
    Baton Rouge :Taylor & Francis Group,
    Keywords: Artificial intelligence -- Biological applications. ; Biology -- Data processing. ; Environmental engineering -- Data processing. ; Neural networks (Computer science) -- Scientific applications. ; Electronic books.
    Description / Table of Contents: ForewordPrefaceAcknowledgmentsAuthor BiographyGuest ContributorsGlossary of AcronymsIntroductionArtificial Intelligence: Competing Approaches or Hybrid Intelligent Systems?Neural Networks: An Introduction and Brief HistoryNeural Network Application Areas Concluding Remarks References Network ArchitecturesNeural Network Connectivity and Layer Arrangement Feedforward Neural Networks Recurrent Neural NetworksConcluding Remarks References Model Design and Selection ConsiderationsIn Search of the Appropriate ModelData AcquisitionData Preprocessing and Transformation ProcessesFeature Selection Data Subset SelectionNeural Network Training Model SelectionModel Validation and Sensitivity Analysis Concluding Remarks References Intelligent Neural Network Systems and Evolutionary LearningHybrid Neural SystemsAn Introduction to Genetic AlgorithmsAn Introduction to Fuzzy Concepts and FuzzyInference SystemsThe Neural-Fuzzy Approach Hybrid Neural Network-Genetic Algorithm Approach Concluding RemarksReferences Applications in Biological and Biomedical AnalysisIntroductionApplicationsConcluding Remarks References Applications in Environmental AnalysisIntroduction Applications Concluding Remarks References Appendix I: Review of Basic Matrix Notation and OperationsAppendix II: Cytochrome P450 (CYP450) Isoform Data Set Used in Michielan et al (2009)Appendix III: A 143-Member VOC Data Set and Corresponding Observed and Predicted Values of Air-to-Blood Partition CoefficientsIndex.
    Type of Medium: Online Resource
    Pages: 1 online resource (206 pages)
    Edition: 1st ed.
    ISBN: 9781439812594
    Series Statement: Analytical Chemistry Series
    DDC: 570.285/63
    Language: English
    Note: Front Cover -- Contents -- Foreword -- Preface -- Acknowledgments -- The Author -- Guest Contributors -- Glossary of Acronyms -- Chapter 1: Introduction -- Chapter 2: Network Architectures -- Chapter 3: Model Design and Selection Considerations -- Chapter 4: Intelligent Neural Network Systems and Evolutionary Learning -- Chapter 5: Applications in Biological and Biomedical Analysis -- Chapter 6: Applications in Environmental Analysis -- Appendix I: Review of Basic Matrix Notation and Operations -- Appendix II: Cytochrome P450 (CYP450) Isoform Data Set Used in Michielan et al. (2009) -- Appendix III: A 143-Member VOC Data Set and Corresponding Observed and Predicted Values of Air-to-Blood Partition Coefficients -- Back Cover.
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  • 2
    Online Resource
    Online Resource
    St Albans :ILM Publications,
    Keywords: Pollution -- Mathematical models. ; Pollutants -- Mathematical models. ; Environmental monitoring. ; Electronic books.
    Description / Table of Contents: Environmental modelling has enjoyed a long tradition, but there is a defined need to continually address both the power and the limitations of such models, as well as their quantitative assessment. This book showcases modern environmental modelling methods, the basic theory behind them and their incorporation into complex environmental investigations. It highlights advanced computing technologies and how they have led to unprecedented and adaptive modelling, simulation and decision-support tools to study complex environmental systems, and how they can be applied to current environmental concerns. This volume is essential reading for researchers in academia, industry and government-related bodies who have a vested interest in all aspects of environmental modelling.Features include: A range of modern environmental modelling techniques are described by experts from around the world, including the USA, Canada, Australia, Europe and Thailand; many examples from air, water, soil/sediment and biological matrices are covered in detail throughout the book; key chapters are included on modelling uncertainty and sensitivity analysis; and, a selection of figures are provided in full colour to enable greater comprehension of the topics discussed.
    Type of Medium: Online Resource
    Pages: 1 online resource (370 pages)
    ISBN: 9781906799236
    Series Statement: Modelling of Pollutants in Complex Environmental Systems ; v.1
    DDC: 363.738015118
    Language: English
    Note: Intro -- mkf7 -- Figure 1 -- Figure 2 -- Figure 3 -- Figure 4 -- Figure 5 -- Figure 6 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53 -- mkr54 -- mkr55 -- mkr56 -- mkr57 -- mkr58 -- mkr59 -- mkr60 -- mkr61 -- mkr62 -- mkr63 -- mkr64 -- mkr65 -- mkr66 -- mkr67 -- mkr68 -- mkr69 -- mkr70 -- Outline placeholder -- Equation 1 -- Equation 2 -- Equation 3 -- Equation 4 -- Equation 5 -- Figure 1 -- Equation 6 -- Figure 2 -- Equation 7 -- Equation 8 -- Equation 9 -- Figure 3 -- Equation 10 -- Equation 11 -- Equation 12 -- Equation 13 -- Equation 14 -- Figure 4 -- Figure 5 -- Equation 15 -- Equation 16 -- Figure 6 -- Figure 7 -- Equation 17 -- Equation 18 -- Figure 8 -- Equation 19 -- Equation 20 -- Equation 21 -- Equation 22 -- Equation 23 -- Figure 9 -- Equation 24 -- Equation 25 -- Equation 26 -- Equation 27 -- Equation 28 -- Equation 29 -- Equation 30 -- Equation 31 -- Equation 32 -- Equation 33 -- Equation 34 -- Equation 35 -- Equation 36 -- Equation 37 -- Equation 38 -- Equation 39 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52. , Outline placeholder -- Equation 1 -- Equation 2 -- Table 1 -- Table 2 -- Table 3 -- Table 4 -- Table 5 -- Figure 2 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- Outline placeholder -- Figure 1 -- Figure 2 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkf14 -- mkf15 -- Figure 1 -- Equation 1 -- Equation 2 -- Equation 3 -- Equation 4 -- Equation 5 -- Equation 6 -- Equation 7 -- Equation 8 -- Equation 9 -- Equation 10 -- Equation 11 -- Table 1 -- Equation 12 -- Equation 13 -- Equation 14 -- Equation 15 -- Equation 16 -- Equation 17 -- Equation 18 -- Equation 19 -- Equation 20 -- Equation 21 -- Equation 22 -- Equation 23 -- Equation 24 -- Equation 25 -- Equation 26 -- Equation 27 -- Equation 28 -- Equation 29 -- Equation 30 -- Equation 31 -- Figure 2 -- Equation 32 -- Figure 3 -- Equation 33 -- Figure 4 -- Table 2 -- Figure 5 -- Equation 34 -- Equation 35 -- Equation 36 -- Equation 37 -- Equation 38 -- Equation 39 -- Equation 40 -- Equation 41 -- Equation 42 -- Equation 43 -- Equation 44 -- Equation 45 -- Figure 6 -- Figure 7 -- Figure 8 -- Figure 9 -- Figure 10 -- Figure 11 -- Figure 12 -- Figure 13 -- Figure 16 -- Figure 17 -- Figure 18 -- Figure 19 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30. , mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53 -- mkr54 -- mkr55 -- mkr56 -- mkr57 -- mkr58 -- mkr59 -- mkr60 -- mkr61 -- mkr62 -- mkr63 -- mkr64 -- mkr65 -- mkr66 -- mkr67 -- mkr68 -- mkr69 -- mkr70 -- mkr71 -- mkr72 -- mkr73 -- mkr74 -- mkr75 -- mkr76 -- mkr77 -- mkr78 -- mkr79 -- mkr80 -- mkr81 -- mkr82 -- mkr83 -- mkr84 -- mkr85 -- mkr86 -- mkr87 -- mkr88 -- mkr89 -- mkr90 -- mkr91 -- mkr92 -- mkr93 -- mkr94 -- mkr95 -- mkr96 -- mkr97 -- mkr98 -- mkr99 -- mkr100 -- mkr101 -- mkr102 -- mkr103 -- mkr104 -- mkr105 -- mkr106 -- mkr107 -- mkr108 -- mkr109 -- mkr110 -- mkr111 -- mkr112 -- mkr113 -- mkr114 -- mkr115 -- mkr116 -- mkr117 -- mkr118 -- mkr119 -- mkr120 -- mkr121 -- mkr122 -- mkr123 -- mkr124 -- mkr125 -- mkr126 -- mkr127 -- mkr128 -- mkr129 -- mkr130 -- mkr131 -- mkr132 -- mkr133 -- mkr134 -- mkf11 -- Equation 1 -- Equation 2 -- Equation 3 -- Figure 1 -- Figure 2 -- Figure 3 -- Equation 4 -- Table 1 -- Equation 5 -- Figure 4 -- Figure 5 -- Figure 6 -- Table 2 -- Figure 7 -- Equation 6 -- Equation 7 -- Equation 8 -- Equation 9 -- Equation 10 -- Equation 11 -- Equation 12 -- Equation 13 -- Table 3 -- Figure 8 -- Table 4 -- Figure 9 -- Equation 14 -- Equation 15 -- Equation 16 -- Equation 17 -- Figure 10 -- Table 5 -- Equation 18 -- Equation 19 -- Equation 20 -- Equation 21 -- Equation 22 -- Equation 23 -- Equation 24 -- Equation 25 -- Equation 26 -- Figure 12 -- Figure 13 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36. , mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53 -- mkf17 -- mkf23 -- mkf24 -- mkf25 -- mkf7 -- mkf8 -- Equation 2 -- Equation 1 -- Figure 1 -- Figure 2 -- Figure 3 -- Equation 4 -- Equation 3 -- Equation 5 -- Equation 6 -- Figure 4 -- Equation 5 -- Figure 5 -- Figure 6 -- Table 1 -- Table 2 -- Table 3 -- Figure 9 -- Figure 10 -- Figure 11 -- Figure 12 -- Figure 14 -- Table 4 -- Figure 15 -- Table 5 -- Table 6 -- Figure 16 -- Table 7 -- Figure 18 -- Figure 19 -- Figure 20 -- Figure 21 -- Table 8 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53 -- mkr54 -- mkr55 -- mkr56 -- mkr57 -- mkr58 -- mkr59 -- mkr60 -- mkr61 -- mkr62 -- mkr63 -- mkr64 -- mkr65 -- mkr66 -- mkf2 -- Equation 1 -- Equation 2 -- Equation 3 -- Equation 4 -- Equation 5 -- Equation 6 -- Table 1 -- Table 2 -- Figure 1 -- Table 3 -- Figure 3 -- Table 4 -- Figure 4 -- Equation 7 -- Figure 5 -- Table 5 -- Figure 6 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53. , mkr54 -- mkr55 -- mkr56 -- mkr57 -- mkr58 -- mkr59 -- mkr60 -- mkr61 -- mkr62 -- Outline placeholder -- Equation 1 -- Equation 2 -- Equation 3 -- Equation 4 -- Equation 5 -- Equation 6 -- Equation 7 -- Equation 8 -- Equation 9 -- Equation 10 -- Equation 11 -- Equation 12 -- Equation 13 -- Equation 14 -- Equation 15 -- Equation 16 -- Equation 17 -- Equation 18 -- Equation 19 -- Equation 20 -- Equation 21 -- Equation 22 -- Equation 23 -- Equation 24 -- Equation 25 -- Equation 26 -- Equation 27 -- Equation 28 -- Equation 29 -- Equation 30 -- Equation 31 -- Equation 32 -- Equation 33 -- Equation 34 -- Equation 35 -- Equation 36 -- Equation 37 -- Equation 38 -- Equation 39 -- Equation 40 -- Equation 41 -- Equation 42 -- Equation 43 -- Equation 44 -- Equation 45 -- Equation 46 -- Equation 47 -- Equation 48 -- Equation 49 -- Figure 1 -- Equation 50 -- Equation 51 -- Equation 52 -- Equation 53 -- Equation 54 -- Equation 55 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- mkr23 -- mkr24 -- mkr25 -- mkr26 -- mkr27 -- mkr28 -- mkr29 -- mkr30 -- mkr31 -- mkr32 -- mkr33 -- mkr34 -- mkr35 -- mkr36 -- mkr37 -- mkr38 -- mkr39 -- mkr40 -- mkr41 -- mkr42 -- mkr43 -- mkr44 -- mkr45 -- mkr46 -- mkr47 -- mkr48 -- mkr49 -- mkr50 -- mkr51 -- mkr52 -- mkr53 -- mkr54 -- mkr55 -- mkr56 -- mkf9 -- Figure 2 -- Figure 3 -- Figure 4 -- Figure 5 -- Figure 6 -- Figure 7 -- Figure 8 -- Figure 10 -- Figure 11 -- mkr1 -- mkr2 -- mkr3 -- mkr4 -- mkr5 -- mkr6 -- mkr7 -- mkr8 -- mkr9 -- mkr10 -- mkr11 -- mkr12 -- mkr13 -- mkr14 -- mkr15 -- mkr16 -- mkr17 -- mkr18 -- mkr19 -- mkr20 -- mkr21 -- mkr22 -- Outline placeholder -- Equation 1 -- Equation 2 -- Equation 3 -- Equation 4 -- Equation 5 -- Equation 6 -- Equation 7 -- Equation 8 -- Equation 9. , Equation 10.
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  • 3
    Online Resource
    Online Resource
    Milton :Taylor & Francis Group,
    Keywords: Chemometrics. ; Electronic books.
    Description / Table of Contents: A delineation of modern environmental analysis and methods of effectively solving limitations through multivariate approaches, this book begins with an overview of chemometrics in relation to quantitative environmental analysis and a review of descriptive statistical concepts. The author's presentation of the basic principles of these methods together with real applications in the field of environmental chemistry simplifies comprehension of complex environmental problems and chemically-related concepts. The coverage of environmental analysis, backed by studies from experts in the field, elucidates the rapidly developing world of chemometric methods in environmental analysis.
    Type of Medium: Online Resource
    Pages: 1 online resource (316 pages)
    Edition: 1st ed.
    ISBN: 9781420067972
    DDC: 543.01/5195
    Language: English
    Note: Front cover -- Contents -- Preface -- Acknowledgments -- Author -- Chapter 1. Introduction -- Chapter 2. Review of Statistics and Analytical Figures of Merit -- Chapter 3. Quality Assurance in Environmental Analysis -- Chapter 4. Experimental Design and Optimization Techniques -- Chapter 5. Time Series Analysis -- Chapter 6. Multivariate Data Analysis -- Appendix I: Common Excel Shortcuts and Key Combinations -- Appendix II: Symbols Used in Escuder-Gilabert et al. (2007) -- Appendix III: Review of Basic Matrix Algebra Notation and Operations -- Appendix IV: Environmental Chain of Custody -- Index -- Back cover.
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  • 4
    Online Resource
    Online Resource
    St Albans :ILM Publications,
    Keywords: Pollution -- Mathematical models. ; Pollutants -- Mathematical models. ; Environmental monitoring. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (504 pages)
    DDC: 363.738015118
    Language: English
    Note: Intro -- TABLE OF CONTENTS -- CHAPTER 1 -- CHAPTER 2 -- CHAPTER 3 -- CHAPTER 4 -- CHAPTER 5 -- CHAPTER 6 -- CHAPTER 7 -- CHAPTER 8 -- CHAPTER 9 -- CHAPTER 10 -- CHAPTER 11 -- CHAPTER 12 -- CHAPTER 13 -- CHAPTER 14 -- CHAPTER 15 -- CHAPTER 16 -- EPILOGUE -- INDEX.
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  • 5
    Publication Date: 2017-05-30
    Description: The design and deployment of an in situ flow injection (FI) monitor for high temporal resolution monitoring of phosphate in the River Frome, Dorset, UK, is described. The monitor incorporates solenoid, self-priming micropumps for propulsion, solenoid-operated switching valves for controlling the fluidics and a miniature CCD spectrometer for full spectrum (200-1000 nm) acquisition and operates in a graphical programming environment. A tangential filtration unit is attached to the sample inlet line to remove suspended particulate matter and prevent blockage of the micropumps and valves. Detection (at 7 10 nm) is based on molybdenum blue chemistry with tin(II) chloride reduction. The detection limit is 0.67 muM PO4 and the linear range can be adjusted by using different wavelengths for detection. Pump noise is eliminated by subtraction of the signal at a non-absorbing wavelength (447 nm). Data from an intensive (sample every 30 min) field trial on the River Frome performed in October 2000 are presented, and the implications of the data for refining an export coefficient model for phosphorus from the catchment are discussed.
    Type: Article , PeerReviewed
    Format: text
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  • 6
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    American Society of Agronomy
    In:  Journal of Environment Quality, 30 (5). pp. 1738-1746.
    Publication Date: 2020-07-24
    Description: This paper describes the results of an export coefficient modeling approach to predict total phosphorus (TP) loading in the Frome catchment, Dorset, UK from point and diffuse sources on a seasonal (monthly) basis in 1998 and on an annual basis for 1990–1998. The model predicted an annual TP load of 25605 kg yr−1, compared with an observed (measured) value of 23400 kg yr−1 Monthly loads calculated using the export coefficient model agreed well with monthly observed values except in months of variable discharge, when observed values were low, probably due to infrequent, and therefore unrepresentative, sampling. Comparison between filterable reactive phosphorus (FRP) and TP concentrations observed in the period 1990–1997 showed that trends in FRP could be estimated from trends in TP. A sensitivity analysis (varying individual export coefficients by ±10%) showed that sewage treatment works (STWs) (3.5%), tilled land (2.7%), meadow–verge–seminatural (1.0%), and mown and grazed turf (0.6%) had the most significant effect (percent difference from base contribution) on model prediction. The model was also used to estimate the effect of phosphorus stripping at STWs in order to comply with a pending change in the European Union wastewater directive. Theoretical reduction of TP from the largest STW in the catchment gave a predicted reduction in TP loading of 2174 kg yr−1 This illustrates the value of this seasonal export coefficient model as a practical management tool.
    Type: Article , PeerReviewed
    Format: text
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  • 7
    Publication Date: 2017-05-30
    Description: The aim of this paper was to examine historical physico-chemical water quality parameters (1990–1997) in the River Frome, East Stoke (NGR SY867868), in order to show both annual and seasonal (monthly) trends. EpCO2 (defined as the partial pressure of CO2 in natural water divided by the equilibrium partial pressure of CO2) levels ranged from mean values of 6.32±0.41 in spring/summer to 7.86±1.17 in autumn/winter. A decreasing trend in mean annual EpCO2 was also observed, with a high of 9.61 in 1990 and a low of 5.22 in 1996. The variations were attributed to changes in pH, which showed an inverse relationship with river discharge (r2=0.47). Both pH and EpCO2 levels were strongly linked to biological activity with increases caused by primary productivity. Filterable reactive phosphorus (FRP) and total phosphorus (TP) concentrations correlated with river discharge. The results showed that the majority of the phosphorus load was transported during storm events, which agrees with results from an export coefficient model predicting phosphorus loading in the Frome catchment. Recent River Frome monitoring campaigns using an in situ flow-injection (FI)-based monitor were in agreement with phosphorus concentration and related physico-chemical trends observed during historical sampling and laboratory analysis.
    Type: Article , PeerReviewed
    Format: text
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