Modeling phosphorus in the environment - Chapter 1 pptx

... working on a modeling approach to BMP evaluation (see Chapter 15 on BMPs in this book; Gitau et al. 20 01) . An initial step in modeling BMP-induced reduction in P loss is the characterization of the ... Fluvial Processes and Impact of P in Surface Waters 12 1. 7 .1 Fluvial Processes 12 1. 7.2 Surface Water Impacts 14 1. 8 Summary 14 References 15 1. 1 INTRODUCT...

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... 0 .15 23 65 23 16 4 November 12 2.4 27.4 49.5 0.07 0.09 67 19 6 11 5 254 December 12 7.5 70.6 71. 2 0 .13 0 .18 59 13 1 211 2 61 1997 January 18 2 .1 129.5 10 1.4 0.70 0.23 14 5 12 6 437 269 February (11 0) b 81. 8 ... 64 17 9 2 31 229 March (17 0.7) b 0.0 0.0 0.0 0.00 0.00 0 0 0 0 April 86.5 30.9 26.3 0 .15 0.04 11 5 12 3 262 16 9 May 15 2.4 82.7 70.8 1. 10 0.57 12 3 1...

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... PA CONTENTS 13 .1 History of Development 3 01 13 .1. 1 Background 3 01 13 .1. 2 Development 304 13 .2 Index Framework 306 13 .2 .1 Parameters 306 13 .2.2 Calculating a Phosphorus Index Value 322 13 .3 Inclusion ... Mehlich -1 P Mississippi extract Mehlich-3 P Olsen-P (High pH) Bray P -1 (Low pH) Mehlich-3 P Olsen-P (High pH) Bray P -1 (Low pH) Mehlich-3 P FIV based on Mehlich-3...

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... In- Stream Processes 410 17 .7 Phosphorus Indices 411 17 .8 Calibration and Uncertainty 411 17 .9 Data to Support Phosphorus Modeling 412 17 .10 Summary 413 References 413 17 .1 INTRODUCTION Much progress ... Modeling of Phosphorus 413 17 .10 SUMMARY Much progress has been made in the modeling of P in the environment over the past 30 years. To continue this pr...

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... LLC Modeling Runoff and Erosion in Phosphorus Models 59 determine in ltration using the Green-Ampt or other in ltration equation and then to subtract in ltration from rainfall to determine the ... Maidment. 19 95. Continuous-time water and sediment- routing model for large basins. J. Hydraul. Eng. 12 1 :17 1 18 3. Bagnold, R.A. 19 77. Bedload transport in natural rivers. Wat...

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... kg -1 ) 0.0 0.5 1. 0 1. 5 2.0 400 300 200 10 0 0 Data Langmuir Isotherm GLEAMS - 15 d GLEAMS - 50 d GLEAMS - equilibrium © 2007 by Taylor & Francis Group, LLC 86 Modeling Phosphorus in the Environment Several ... on the size and spacing of the drains (van der Ploeg et al. 19 99). Models described in the following chapters simulate tile drain flow in...

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... sediment interactions in the Eucha-Spavinaw Basin, USA. J. Soil Water Conserv. 61: 105 11 5. © 2007 by Taylor & Francis Group, LLC 10 5 5 Phosphorus Transport in Streams: Processes and Modeling ... Concentrations 11 7 5.6 Impact of Stream Processes on Eutrophication 12 0 5.7 Modeling Phosphorus Transport in Stream Channels 12 2 5.8 Conclusions 12 4 References 12 5 5...

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... 19 95 to 19 96 data. 13 57 911 13 15 17 19 21 23 Timestep MRP (mg l -1 )Discharge (mm wk -1 ) 13 57 911 1 315 1 719 212 3 Timestep 1 23456789 11 10 12 13 Timestep 12 345678 910 11 1 312 Timestep Obs Min obs 1 Max ... l -1 ) 18 00 16 00 14 00 12 00 10 00 800 600 400 200 0 14 0 12 0 10 0 80 60 40 20 0 Discharge (mm wk -1 ) 250 200 15 0 10 0 50 0 © 20...

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... NO 3 is the amount of nitrate in the soil layer (kg N ha 1 ). The C:P ratio is calculated as (7 .14 ) 7.2.3 INORGANIC PHOSPHORUS SORPTION The inorganic P pool, originating either from mineralization ... Station, TX CONTENTS 7 .1 SWAT Model Background 16 4 7.2 Phosphorus Modeling in SWAT: Soil Phosphorus Interactions 16 7 7.2 .1 Initialization of Soil Phosphorus Le...

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... 0.79. Observed Simulated Date 19 83 Stream Discharge (cms) 19 84 19 85 19 86 19 87 19 88 19 89 19 90 19 91 1000 10 0 10 1 © 2007 by Taylor & Francis Group, LLC 212 Modeling Phosphorus in the Environment modeling water ... 19 91. Simulated Observed Date 19 83 Total Phosphorus (P mg/L) 19 84 19 85 19 86 19 87 19 88 19 89 19 90 19 91 2 1. 6 1. 2 0.8...

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