Evaluation of ESTMORF : mass balance and additional simulation

The Directoraat-Generaal Rijkswaterstaat is interested in morphological models predicting the consequences of (human) interference (e.g. dredging, land reclamation) in the geometry of estuaries and tidal basins. Rijkswaterstaat/Directie Zeeland commissioned Delft Hydraulics to perform an additional evaluation and a simulation on the software progam ESTMORF, a model build for the long-term morphological development of estuaries. The main objective of the study is to validate Estmorf with respect to the solution of the concentration equation, the subsequent cross-selectional area change and the incorporation of human interference in the system. In order to do so, existing subroutines have been changed to produce the necessary output for the validation and new post-processing software has been developed. The results can be considered as the outcome of an iterative process, consisting of the following steps: a. programming of the output procedures for the validation b. simulation with the Westerschelde model over the period 1968-1993; sediment mass balance check for each branch of the Westerschelde model for the simulation described above c. assessment of the results d. adjustment of the software, if necessary Steps b-d have been repeated until the validation showed good results.