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Summary of Proposal HYD2966

TitleDikes under pressure – Technical and ecological Vulnerability and Resilience of dike landscapes - Methodology development using TSX-Archive data
Investigator Marzahn, Philip - LMU Munich, Department of Geography
Team Member
Prof. Ludwig, Ralf - Prof. Dr. Ralf Ludwig, Ludwig-Maximilians Universität München, Department für Geographie
Dr. Martinis, Sandro - Dr. Sandro Martinis, Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Deutsches Fernerkundungsda
Prof. Dr. Strunz, Günter - Prof. Dr. Günter Strunz, DLR, EOC
M. Sc. Tsyganskaya, Viktoriya - M. Sc. Viktoriya Tsyganskaya, Ludwig-Maximilians Universität München, Department für Geographie
Dr. Marzahn, Philip - Dr. Philip Marzahn, Ludwig-Maximilians Universität München, Department für Geographie
M. Sc. Seidel, Moritz - M. Sc. Moritz Seidel, Ludwig-Maximilians Universität München, Department für Geographie
SummaryEarth observation provides an increasingly stronger contribution todisaster prevention and crisis management. This helps both decisionmakers and emergency services in place. By the setup of the sentinelfleet, as well as the extension of national missions, the number ofavailable satellite sensors and the overflight frequency over risk- anddisaster areas is increasing. Thus a higher spatial and temporalcoverage is given for the derivation of crisis information. Itisexpected that in future, user requirements can be better served andthat an improved operational use of satellite systems with optimizedproducts or services will be achieved. For this purpose it is essentialto explore the possibilities of new sensors as well as the synergisticbenefits of different systems in order to fall back in the case ofcrisis situations on a profound basis for decision making. By „Dikesunder pressure“ a profound basis for decision making will be created for the analysis of the data from Sentinel-1/2 and from german nationalmissions (TerraSAR-X, RapidEye), allowing an optimized and synergisticuse of these systems to monitor the technical and ecologicalvulnerability and resilience of dike landscapes. The focus is on theinvestigation of the stability of dikes and the dike surrounding area in presence of natural processes such as floods and tides, as well asanthropogenic changes using Synthetic Aperture Radar(SAR)interferometry. In the process possible vertical and horizontalmovements/changes in the dike body and dike surrounding areas areobserved and therefore an efficient method for the monitoring of dikeswill be developed. In the project methods based on remote sensing forthe detection of possible land use changes as a result offairwaydeepening in important river basins, along with a potentialsubsidence of the dike surrounding areas and a possible salt intrusionin the groundwater body will be developed. During prolonged floodevents, the horizontal pressure of the water causes an increased riskpotential onthe dike body. In this project by the synergistic use of SAR and optical sensors, existing algorithms will be further developed todetect open waterbodies as well as underflooded vegetation/waterbodiesand dike percolations. Their size and volume will be used as anindicator for the condition of a dyke and also for the analysis andvalidation of deformations identified by means of SAR interferometry.

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