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The effective water and conservation management of a wetland requires an understanding of its key hydrological processes. This paper investigates the capability of the physically-based distributed modelling system MIKE SHE to simulate the hydrological behaviour of the North Kent grazing marshes, GB. The ecological importance of these marshes is reflected in their designation as Sites of Special Scientific Interest. The MIKE SHE code is applied to an underdrained catchment located within the marshes, Bells Creek, where the discharge from the drainage system is known from pumping records. The data collection and preparation required for MIKE SHE as well as model calibration and verification are described. The principal parameters used for model calibration are discussed and potential sources of uncertainty in the simulation results are highlighted. Errors in the input data, precipitation and soil and vegetation properties, and in observed outputs (eg discharge) may be the primary sources of uncertainty. However, in spite of these uncertainties and the general lack of field measured data, MIKE SHE is able to predict the shape and magnitude of the hydrograph of 1987/1988 as well as other hydrological parameters relatively well.

Additional information

Authors: AL-KHUDHAIRY, JRC Ispra (IT);SHEPHERD I, JRC Ispra (IT);THOMPSON J, University College London, Wetland Research Unit, London (GB)
Bibliographic Reference: Paper presented: Intecol's V International Wetlands Conference 1996, Perth (AU), September 22-28, 1996
Availability: Available from (1) as Paper EN 40063 ORA
Record Number: 199611388 / Last updated on: 1996-12-04
Original language: en
Available languages: en