Modeling phosphorus in the environment - Chapter 2 ppsx

... Group, LLC 22 Modeling Phosphorus in the Environment 2. 1 INTRODUCTION Runoff and erosion are the overland processes that transport phosphorus. The processes and equations describing the processes ... depend on the units of flow and storage. Substituting Equation 2. 29 for S in Equation 2. 26 and collecting like terms yields O 2 = c 0 I 2 + c 1 I 1 + c 2 O 1 (...

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... net gain of sediments. sed_loss Value -8 35 - -7 50 -7 50 - -6 00 -6 00 - -4 50 -4 50 - -3 00 -3 00 - -1 50 -1 50 - 0 0 -1 50 150 - 300 300 - 450 © 20 07 by Taylor & Francis Group, LLC 24 1 10 ANSWERS -2 0 00: ... Italy Theo A. Dillaha Virginia Polytechnic Institute and State University, Blacksburg, VA CONTENTS 10.1 Introduction...

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... of receiving water bodies (Beaulac and Reckhow 19 82; Hanrahan et al. 20 01; © 20 07 by Taylor & Francis Group, LLC 12 Modeling Phosphorus in the Environment the principles of mapping could be invoked ... 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...

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... LLC 96 Modeling Phosphorus in the Environment to simulate P loading to streams from base flow or tile flow (Neitsch et al. 20 02a); however, this may lack continuity with modeling routines depicting ... on the size and spacing of the drains (van der Ploeg et al. 1999). Models described in the following chapters simulate tile drain flow in a variety of ways, including the...

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... Haggard 20 01; Novak et al. 20 03). Phosphorus 124 Modeling Phosphorus in the Environment The concept of sediment EPC 0 might provide a useful mechanism to simulate in- stream processes in these ... transported in dissolved form (Baldwin et al. 20 02) . In a much larger catchment, McDowell et al. (20 02) examined the processes controlling sediment P release to the...

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... (,, ,)) ( ) exp / εθ πσ σ ε =−  − = ∑ 2 1 2 22 2 2 1 t t        LMIXt T (| (,, ,)) ( ) ( ) exp // εθ πσ α σ =− ×− − 21 1 2 22 2 12 22 2 1 2 1 2 2 1()() [ ( )]−−+−−−      − = ∑ αεµ ... applications, including flood forecasting involving data assimilation (e.g., Krzysztofowicz 20 02; Young 20 01, 20 02 and references therein), groundwater modeling, including...

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... Group, LLC 1 82 Modeling Phosphorus in the Environment response variables are chosen (Cotter et al. 20 03; Kirsch et al. 20 02; Santhi et al. 20 01a; White and Chaubey 20 05). The increase in the number ... 164 7 .2 Phosphorus Modeling in SWAT: Soil Phosphorus Interactions 167 7 .2. 1 Initialization of Soil Phosphorus Levels 168 7 .2. 2 Mineralization, Decompos...

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... nonpoint 15 ,20 2 2. 75 41, 828 51 Point NA NA 2, 5 32 3 © 20 07 by Taylor & Francis Group, LLC 20 2 Modeling Phosphorus in the Environment • JRER: splash detachment exponent; default = 2. 0; HSPFParm ... 1991 1000 800 600 400 20 0 0 © 20 07 by Taylor & Francis Group, LLC 20 4 Modeling Phosphorus in the Environment nine sub-basins. The area of watershe...

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... (g/ha) Oct-96 Mar-97 Sep-97 Mar-98 Sep-98 Mar-99 Sep-99 Mar-00 Sep-00 Time (months) 120 0 1000 800 600 400 20 0 0 Observed Predicted Total P loss (g/ha) Oct-96 Mar-97 Sep-97 Mar-98 Sep-98 Mar-99 Sep-99 ... 63.8 4.8 25 .6 0. 02 0.15 23 65 23 164 November 122 .4 27 .4 49.5 0.07 0.09 67 196 115 25 4 December 127 .5 70.6 71 .2 0.13 0.18 59 131 21 1 26 1 1997 January 1 82. 1 129 .5 101....

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... Predicting Phosphorus in Runoff 28 4 12. 5 Predicting Phosphorus Leaching 28 5 12. 6 Simulating Management and BMPs 28 5 12. 7 Simulating In- Stream Processes 28 6 12. 8 Example Simulations 28 7 12. 8.1 Use of GWLF ... of Environmental Protection, Kingston, NY CONTENTS 12. 1 History of Model Development 27 7 12. 2 Spatial and Temporal Resolution 27 9 12. 3 Predicting I...

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