Details

Autor(en) / Beteiligte

• Ostendorf, David W
• Peeling, David C
• Mitchell, Travis J
• Pollock, Samuel J

Titel

Chlorida persistence in a deiced access road drainage system

Ist Teil von

• Journal of environmental quality, 2001-09, Vol.30 (5), p.1756

Ort / Verlag

Madison: American Society of Agronomy

Erscheinungsjahr

2001

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• Three years of field data, classical linear reservoir theory, and a new dissolution model confirm the hypothesis that residual chloride from highway deicing applications dissolves into precipitation throughout the year. The measured input includes 52 storm hyetographs and logs of salt and premix applications on an access road with a closed drainage system subject to runoff, interflow, and baseflow. The output data feature discharge and conductivity in an outlet weir measured continuously from February 1998 to May 2000. Individual storm hydrographs and pollutographs yield calibrated first flush dissolved chloride concentrations and residual solid chloride loads that persist at appreciable levels over the entire period of record. The storm calibrations imply a source strength w of 2.01 x 10(-6) s(-1) that accurately models chloride dissolution kinetics through three salt seasons on the access road. This w rests on physically plausible values for the depression storage depth zeta (3 mm) and porosity n (0.40) that store the residual chloride.