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1 van Walsum, P. E. V.; Joosten, J. H. J.. 1994. Quantification of local ecological effects in regional hydrologic modelling of bog reserves and surrounding agricultural lands. Agricultural Water Management, 25(1):45-55.
(Location: IWMI-HQ Call no: PER Record No: H014065)
A bog reserve surrounded by agricultural lands can easily give rise to conflicts, especially if the subsoil has good water-transmitting properties. Hydrologic modelling can be used to quantify the linkage between water management in agricultural lands and bog hydrology. However, most studies stop short of translating hydrologic effects into ecological ones. This is mainly due to the difference in scale between the hydrologic modelling and the fine-scaled landscape patterns in nature reserves. We developed a down- scaling method that attempts to bridge this gap. We assumed that for permanent bog growth to be possible, the long-term average of the downward seepage must not exceed a certain critical value. The area where the critical value is not exceeded was called the "Potential Bog Area". A method was devised for estimating changes in the size of this area. Such changes are also considered to be indicative for areal changes of other rare vegetation types in moist habitats. The method is illustrated using results from a study of the Groote Peel bog reserve in The Netherlands.
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