Booklet 1

Die Modellierung des langfristigen stochastischen Bodenwasserregimes zur Ermittlung hydrologischer Standortbedingungen für Auenwälder entlang der Mittelelbe

by Heike Puhlmann (2004)

Abstract:
The frequent occurrence of floods in recent years resulted in a re-assessment of the role of flood plains and in concrete plans for the retrieval of former retention areas as well as the re-establishment of flood plain forests along the courses of rivers. The presented work develops a tool for characterizing hydrologic stand conditions in flood plains and thus, shows a possibility of how to objectively assess the suitability of given sites for revitalizing riverain forests. Keeping in mind the central role of the soil, which serves as a kind of filter for all the other abiotic stand conditions, the new model concept focuses on the Simulation of the long-term soil-water regime as the major stand factor. Exploiting the results of these simulations, the typical mean annual course of the soil moisture together with the related variances can be derived. Besides, the simulations allow Statements on the occurrence of extreme events in the soil-water regime (water deficits, water Saturation). A first application of the model concept on a flood plain on the Middle Elbe demonstrates the technical realization of the concept and derives, for the considered hardwood stand, the relevant characteristics of the soil-water regime.