HYDROLOGICAL MODEL OF PEAT-MOUND FORM WITH VERTICALLY VARYING HYDRAULIC CONDUCTIVITY - DISCUSSION

In this comment we argue that the premise on which the peat mound mode l developed by Armstrong (Earth Surface Process and Landforms, 1995, 2 0, 473-477) is based, that hydraulic conductivity shows an exponential decline with depth in bog peats, is unsound. Empirical evidence in th e literature for such an exponential decline is less sound than Armstr ong suggests. In addition, Armstrong's suggestion that the hypothesis of Baird and Gaffney (Earth Surface Processes and Landforms, 1995, 20, 561-566) supports an exponential decline is shown to be erroneous.