Dataset of electrical conductivity coefficients for the GWB programs Dataset format: apr14 method: USGS * Data file of coefficients for calculating the electrical conductivity * of electrolyte solutions, for use by the GWB programs. * * The calculation follows the procedure outlined in the paper: * R. Blaine McCleskey, D. Kirk Nordstrom, Joseph N. Ryan, James W. Ball (2012). * A new method of calculating electrical conductivity with applications to * natural waters. Geochimica et Cosmochimica Acta 77, 369–382. * * The method is summarized in Chapter 3 of the Geochemical and Biogeochemical * Reaction Modeling text, 3rd ed., published by Cambridge University Press * (ISBN 978-1108790864). * * Note that the GWB programs do not assume complete ionization; they use free * species concentrations rather than total concentrations in performing the * calculations. * * EC_Tmin, EC_Tmax, EC_Imax are the minimum and maximum temperatures and * the maximum ionic strength over which the GWB programs will calculate a * value for electrical conductivity. EC_Tmin 0.0 EC_Tmax 95.0 EC_Imax 1.0 * Data specific to the contribution to conductivity of various species follows. * Only the species listed contribute to conductivity, and the spelling of the species * name must match that of the species in the thermodynamic dataset in use. The * contribution of minor species and neutrally charged species to conductivity is * negligible and those species need not be listed here. * * The coefficients listed for each species are organized in columns. * Columns 2-4: coefficients of the quadratic function used to calculate the * ionic conductance in terms of the temperature (in C) * Columns 5-7: coefficients of the quadratic function used to calculate the * parameter A in function of the temperature (in C) * Column 8: value of the fitting parameter B * * For more details check the original reference K+ 0.003046 1.261 40.70 0.00535 0.9316 22.59 1.5 Na+ 0.003763 0.8770 26.23 0.00027 1.141 32.07 1.7 H+ -0.01414 5.355 224.2 -0.00918 1.842 39.23 0.3 Li+ 0.002628 0.7079 19.20 0.00412 0.4632 13.71 0.2 Cs+ 0.003453 1.249 43.94 0.00646 0.7023 21.79 1.3 NH4+ 0.003341 1.285 39.04 0.00132 0.6070 11.19 0.3 Ca+2 0.009645 1.984 62.28 0.03174 2.334 132.3 2.8 Ca++ 0.009645 1.984 62.28 0.03174 2.334 132.3 2.8 Mg+2 0.01068 1.695 57.16 0.02453 1.915 80.50 2.1 Mg++ 0.01068 1.695 57.16 0.02453 1.915 80.50 2.1 Ba+2 0.01059 2.090 68.10 0.03127 2.248 93.91 1.9 Ba++ 0.01059 2.090 68.10 0.03127 2.248 93.91 1.9 Sr+2 0.006649 2.069 61.63 0.00702 0.9009 33.41 0.1 Sr++ 0.006649 2.069 61.63 0.00702 0.9009 33.41 0.1 SO4-- 0.01037 2.838 82.37 0.03324 5.889 193.5 2.6 SO4-2 0.01037 2.838 82.37 0.03324 5.889 193.5 2.6 Cl- 0.003817 1.337 40.99 0.00613 0.9469 22.01 1.5 F- 0.002764 1.087 26.66 0.00178 0.6202 19.34 0.5 Br- 0.000709 1.477 40.91 0.00251 0.5398 12.01 0.1 CO3-- -0.000326 2.998 64.03 -0.00181 5.542 120.2 2.3 CO3-2 -0.000326 2.998 64.03 -0.00181 5.542 120.2 2.3 HCO3- 0.000614 0.9048 21.14 -0.00503 0.8957 10.97 0.1 NO3- 0.001925 1.214 39.90 0.00118 0.5045 23.31 0.1 OH- 0.003396 2.925 121.3 0.00933 0.1086 35.90 0.01 Al+++ 0.02376 3.227 90.24 0.06484 5.149 76.79 3.0 Al+3 0.02376 3.227 90.24 0.06484 5.149 76.79 3.0 Cu++ 0.00818 1.939 53.26 0.0292 6.745 151.5 8.0 Cu+2 0.00818 1.939 53.26 0.0292 6.745 151.5 8.0 Fe++ 0.009939 1.878 54.80 0.03997 3.217 164.5 4.0 Fe+2 0.009939 1.878 54.80 0.03997 3.217 164.5 4.0 Fe+++ 0.02077 4.390 82.42 -0.09676 20.76 -22.18 4.0 Fe+3 0.02077 4.390 82.42 -0.09676 20.76 -22.18 4.0 Mn++ 0.01275 2.109 46.19 0.1071 9.023 135.4 7.6 Mn+2 0.01275 2.109 46.19 0.1071 9.023 135.4 7.6 Zn++ 0.01249 1.912 48.20 0.08284 5.188 75.73 7.0 Zn+2 0.01249 1.912 48.20 0.08284 5.188 75.73 7.0 KSO4- -0.002439 4.253 129.7 -0.01576 6.210 146.8 1.3 NaSO4- 0.002309 5.459 219.2 0.01454 5.193 253.6 0.5 Na(SO4)- 0.002309 5.459 219.2 0.01454 5.193 253.6 0.5 HSO4- 0.000927 0.8337 29.56 0.02887 0.8730 36.25 7.0 H(SO4)- 0.000927 0.8337 29.56 0.02887 0.8730 36.25 7.0 NaCO3- 0.00336 3.845 89.51 0.00061 6.387 141.7 2.0 Na(CO3)- 0.00336 3.845 89.51 0.00061 6.387 141.7 2.0