Modeling phosphorus in the environment - Chapter 12 pps

... and then declines linearly to S avg and S min as P 5-day increases, as given in Figure 12. 1. The relationship of S to P 5-day is different for the dormant vs. the growing season. Breakpoint ... Development 277 12. 2 Spatial and Temporal Resolution 279 12. 3 Predicting In ltration and Runoff 279 12. 4 Predicting Phosphorus in Runoff 284 12. 5 Predicting Phosphorus Leac...

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... LLC 44 Modeling Phosphorus in the Environment field (drainage) boundary to the outlet of the field. This length and difference in elevation from the most remote point to the outlet are the same ... rain falling during the time of concentration, R tc , was proportional to the amount of rain falling during the 24-h period, or where α tc is the fraction of daily rai...

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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 © 2007 by Taylor & Francis Group, LLC 241 10 ANSWERS-2000: ... represents the storage volume at the end of the time increment. The value of Po j+1 is then replaced into Equation...

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... 390 Modeling Phosphorus in the Environment financial investment. Another potential disadvantage of automated samplers is their utilization of a single intake point, which is discussed in detail in ... sampling settings (storm sampling thresh- old, sampling interval, discrete/composite sampling) directly affects the uncertainty of storm water quality data. These settings determi...

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... working on a modeling approach to BMP evaluation (see Chapter 15 on BMPs in this book; Gitau et al. 2001). An initial step in modeling BMP-induced reduction in P loss is the characterization of the ... of receiving water bodies (Beaulac and Reckhow 1982; Hanrahan et al. 2001; © 2007 by Taylor & Francis Group, LLC 12 Modeling Phosphorus in the Environment the...

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... 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 Richards equation linked with ... routines depicting P leaching in the soil profile. Recent interest in determining P leaching losses may lead to alternative methods for modeling P leaching. Simplified forms...

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... on Eutrophication 120 5.7 Modeling Phosphorus Transport in Stream Channels 122 5.8 Conclusions 124 References 125 5.1 INTRODUCTION Modeling of phosphorus (P) transport from the landscape to aquatic ... Novak et al. 2003). Phosphorus 124 Modeling Phosphorus in the Environment The concept of sediment EPC 0 might provide a useful mechanism to simulate in- str...

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... rejecting a model because of errors in the data. Thus, in the case of the grazing inputs and the imbalance in the hydrological fluxes, it is argued that the rejection criteria should be relaxed as the model ... assess- ing the inputs at the measurement scale, together with interpolation errors in space and time to provide the values required at the lumped or distr...

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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 ... Taylor & Francis Group, LLC 172 Modeling Phosphorus in the Environment the solution (labile) and active mineral pools is estimated using the following equi- libri...

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... was delineated into FIGURE 8.4 Upper Etowah River basin with the solid dot indicating the watershed outlet at Canton, Georgia. The gray lines indicate the stream network, and the dark lines indicate ... LLC 212 Modeling Phosphorus in the Environment modeling water movement in HSPF. Donigian and Love (2003) and U.S. Environ- mental Protection Agency (2006) are helpful...

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