| Abstrakt: |
Romanian coastline length of 244 km consists of low-lying shores, beaches (80%) and relatively higher shores, cliffs (20%). Typological point of view, includes both natural shore (beaches and cliffs - approx. 84%) and shoreline "built", approx. 16% (ports, protective hydraulic structures). Studies conducted show that Romanian seaside is in a serious condition in terms of expanding erosion (in approx. 60-70% of the length of shoreline). Thus, in the Danube Delta Biosphere Reserve, shore lost in the last 35 years was more than 2400 ha (approx. 80 ha / year), while accumulations have been only 200 ha (approx. 7 ha / year). The paper presents the opportunity to introduce new methods of mapping, - the use of unmanned aerial vehicles (UAVs or drones). Capture aerial images in coastal area using drones was tested successfully by INCDM period in the last period. Aerial photographs (obtained by drones or aircraft) with specific measurements in situ provides a clear and detailed picture of the coastal system and can be used in coastal erosion monitoring: - The changes, both in longitudinal beach profile (shoreline, eroded surfaces / accretion) and cross section (digital surface models and digital terrain model - DSM and DTM). Digital terrain model allows the calculation of volumes of sediment eroded and / or deposited, the slope, vulnerability index to beach flooding etc. - Evaluation of oceanographic factors (wave's regime, shallow water currents), beach geomorphology, changes in the hydraulic structures. This information underlying modeling and prognosis regarding coastal processes. - identifying vulnerable areas and sectors such risks sectors evolving under natural regime (Danube Delta and lagoon sector) and in those with hydraulic structures and strong anthropic influences. [ABSTRACT FROM AUTHOR] |
