Modeling phosphorus in the environment - Chapter 8 pdf

... 0.79. Observed Simulated Date 1 983 Stream Discharge (cms) 1 984 1 985 1 986 1 987 1 988 1 989 1990 1991 1000 100 10 1 © 2007 by Taylor & Francis Group, LLC 212 Modeling Phosphorus in the Environment modeling water movement in ... was delineated into FIGURE 8. 4 Upper Etowah River basin with the solid dot indicating the watershed outlet at Canton, Georgia. The gray l...

Ngày tải lên: 12/08/2014, 00:22

... 0. 18 4657 .89 0.07 4726 .85 0.10 4764 .86 0.36 487 9 .86 0.93 4965.07 0. 28 5017.16 0. 18 5145.31 1.00 Krypton-ion laser lines: Wavelength (Å) Relative Intensity 52 08. 31 0.14 53 08. 65 0.40 5 681 .88 0.20 6470 .88 ... Spectroscopy 181 an ac ring electrode. The dc field balances the particle against the gravitational force and the ac field maintains the particle at the c...

Ngày tải lên: 18/06/2014, 19:20

... coastal waters. EPA -8 4 0-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 84 1-F-0 0-0 09, Office ... of receiving water bodies (Beaulac and Reckhow 1 982 ; Hanrahan et al. 2001; © 2007 by Taylor & Francis Group, LLC 12 Modeling Phosphorus in the Environment the p...

Ngày tải lên: 12/08/2014, 00:21

... 74 82 85 Good 61 73 81 84 Contoured and terraced Poor 61 72 79 82 Good 59 70 78 81 (continued) © 2007 by Taylor & Francis Group, LLC 38 Modeling Phosphorus in the Environment the cross-sectional ... curbs and storm sewers c 98 98 98 98 Gravel 76 85 8991 Dirt 72 82 87 89 Commercial and business areas (85 % impervious) 89 92 94 95 Industrial districts (72%...

Ngày tải lên: 12/08/2014, 00:21

... 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...

Ngày tải lên: 12/08/2014, 00:22

... 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- stream processes in these watershed models. ... trends in the St. Albans Bay, Vermont, watershed following RCWP land treatment. Pp. 47– 58 in The National Rural Clean Water Program sym- posium, U.S. Environmental Pr...

Ngày tải lên: 12/08/2014, 00:22

... 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...

Ngày tải lên: 12/08/2014, 00:22

... Stefan (19 98) 0. 78 0.59 0.54 0.57, 0. 68 Di Luzio et al. (2002) 0 .82 0. 78 0. 58, 0.70 0.60 Tripathi et al. (2003) 0. 98 (0.97) 0.79 (0 .89 ) Srinivasan et al. (19 98) a 0.77, 0 .84 (0 .87 , 0 .84 ) Srinivasan ... Group, LLC 1 78 Modeling Phosphorus in the Environment Green-Ampt in ltration equation, an improved weather generator, the ability to read in daily solar...

Ngày tải lên: 12/08/2014, 00:22

... (g/ha) Oct-96 Mar-97 Sep-97 Mar- 98 Sep- 98 Mar-99 Sep-99 Mar-00 Sep-00 Time (months) 1200 1000 80 0 600 400 200 0 Observed Predicted Total P loss (g/ha) Oct-96 Mar-97 Sep-97 Mar- 98 Sep- 98 Mar-99 Sep-99 ... change in the input leads to a 1% relative change in the output. A negative value indicates that input and output are inversely related. The greater the absolute value o...

Ngày tải lên: 12/08/2014, 00:22

... 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: ... for the May 26, 1 989 , rainfall event for the Nomini Creek watershed. The dashed line represents the PO 4 -P losses...

Ngày tải lên: 12/08/2014, 00:22