Modeling phosphorus in the environment - Chapter 9 pptx
Modeling phosphorus in the environment - Chapter 9 pptx
... (g/ha)
Oct -9 6 Mar -9 7 Sep -9 7 Mar -9 8 Sep -9 8 Mar -9 9 Sep -9 9 Mar-00 Sep-00
Time (months)
1200
1000
800
600
400
200
0
Observed
Predicted
Total P loss (g/ha)
Oct -9 6 Mar -9 7 Sep -9 7 Mar -9 8 Sep -9 8 Mar -9 9 Sep -9 9 ... system.
The AnnAGNPS model has evolved from the original single-event Agricultural
Nonpoint Source (AGNPS) model developed in the early 198 0s by the USD...
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. 2001). An initial step in modeling
BMP-induced reduction in P loss is the characterization of the ... waters. EPA-840-B9 3-1 00c, U.S. Govern-
ment Printing Office, Washington, D.C.
U.S. Environmental Protection Agency. 2000. The Total Maximum Daily Load (TMDL)
program. EPA 8...
Modeling phosphorus in the environment - Chapter 13 pptx
... LLC
328 Modeling Phosphorus in the Environment
in use and accepted demonstrates the robustness and flexibility of the P Indexing
framework originally proposed by Lemunyon and Gilbert ( 199 3).
Future ... Francis Group, LLC
332 Modeling Phosphorus in the Environment
Sims, J.T. 199 6. The phosphorus index: a phosphorus management strategy for Delaware’s
agricultu...
Modeling phosphorus in the environment - Chapter 17 (end) pptx
... 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 progress, the following improvements to modeling ... Leaching of Phosphorus 408
17.5 Best Management Practices 4 09
17.6 In- Stream Processes 410
17.7 Phosphorus Indices 411
17.8 Calibration and Uncertainty 411
17 .9...
Modeling phosphorus in the environment - Chapter 2 ppsx
... and storm sewers
c
98 98 98 98
Gravel 76 85 899 1
Dirt 72 82 87 89
Commercial and business areas (85% impervious) 89 92 94 95
Industrial districts (72% impervious) 81 88 91 93
Open spaces, lawns, ... 59
determine in ltration using the Green-Ampt or other in ltration equation and then
to subtract in ltration from rainfall to determine the amount of runoff. The runoff
hyd...
Modeling phosphorus in the environment - Chapter 4 potx
... on the size and spacing of
the drains (van der Ploeg et al. 199 9). Models described in the following chapters
simulate tile drain flow in a variety of ways, including the Richards equation linked
with ... is the effective depth to the impermeable layer (cm), m is the water table height
above the drain at the midpoint between drains (cm), and L is the drain spacing (cm)...
Modeling phosphorus in the environment - Chapter 5 potx
... eutrophication. Phosphorus has been identified as the rate-limiting nutri-
ent in the accelerated eutrophication of lakes and reservoirs across the U.S. (Correll
199 9; Smith et al. 199 9).
FIGURE ... Butturini and Sabater 199 8;
199 6; Mulholland et al. 199 0; Niyogi et al. 2004; Valett et al. 2002). Phosphorus uptake
length generally constitutes greater than 90 % of the spi...
Modeling phosphorus in the environment - Chapter 6 pot
... Kamer. 199 1. Prediction uncertainty in an
ecological model of the Oosterschelde estuary. J. Forecasting 10: 191 –2 09.
Klir, G.J. 199 4. The many faces of uncertainty. Pp. 3– 19 in Uncertainty Modelling ... for the periods from 199 4 to 199 5
and 199 5 to 199 6, using the stringent concentration fuzzy acceptance criteria
(Figure 6.2), there were no behavioral simulations. For d...
Modeling phosphorus in the environment - Chapter 7 docx
...
7.4 IN- STREAM PHOSPHORUS CYCLE
SWAT model users have an option to include or exclude in- stream processes in
SWAT simulations. When the in- stream component is included, the model routes
the state ... Taylor & Francis Group, LLC
172 Modeling Phosphorus in the Environment
the solution (labile) and active mineral pools is estimated using the following equi-
libr...
Modeling phosphorus in the environment - Chapter 8 pdf
... Canton, Georgia, for 198 3 through 199 1.
Nash-Sutcliffe coefficient of efficiency is 0. 79.
Observed
Simulated
Date
198 3
Stream Discharge (cms)
198 4 198 5 198 6 198 7 198 8 198 9 199 0 199 1
1000
100
10
1
© ... Canton, Georgia, for 198 3 through 199 1.
Simulated TSS
Observed TSS
Observed Turbidity
Date
198 3
Total Suspended Solids (mg/L), Turbidity (NTU)
198 4 198 5 198 6 198 7 198 8 19...