Stosowanie technologii GIS oraz modelowania trójwymiarowego w badaniach geologicznych strefy brzegowej

The study of sedimentological features in the Guadiana River Estuary on the Portugal and Spanish border is an excellent example of making use of the GIS systems and especially 3D models. This Estuary is a part of southernmost area of Portugal and the Guadiana River is one of the most important rivers on the Iberian Peninsula. Due to rapid sedimentation during the most recent postglacial transgression, estuarine sedimentary records offer an excellent opportunities to study the sequence of events which have led to the present morphology of the coast. Based on the sedimentological records, macro and micro paleontological data and C14 dates an information about the deep structure of Guadiana valley infill was gained. Also data about the depth of the sediment layers occurrence was defined. With the use of all gained data two 3D models representing both the actual surface relief and the relief of the delta from about 13000 year ago were created. Prepared models were used to calculate the area and volume for all of the distinguished sediment layers. Data gained in this process allowed for more detailed analysis of the pace of sedimentation and sea level rise as well as other aspects and geological processes which took place in the Estuary of Guadiana River.