A cartographical perspective to the engineering works at the Sulina mouth

Author Posting. © The Author(s), 2010. This is the author's version of the work. It is posted here by permission of Akadémiai Kiadó for personal use, not for redistribution. The definitive version was published in Acta Geodaetica et Geophysica Hungarica 45 (2010): 71-79, doi:10.1556/AGeod.45.2010.1.11.From 1856 to 1939, the European Commission of the Danube (ECD), was responsible for technical surveys at the mouth of Sulina arm. During this period, ECD prepared general maps of Danube Delta as well as detailed charts for all the Danube mouths: Chilia, Sulina and Sf. Gheorghe (St. George) that were published in various reports or atlases. ECD used a local grid network benchmarked at Sulina, divided in 500 feet units. The reference point was the old lighthouse located on the right bank of Danube. After the Second World War, the Romanian authorities elaborated new cartographical products using the Gauss‐Kruger projection or Stereo‐70 like national grid. Our goal is to generate a cartographical background database necessary for refining the coastal evolution model of the Sulina mouth. To handle the large number of available maps, we chose GeoNetwork like a solution for catalog service, indexing and defining metadata. The service is operating at geo‐spatial.org

Sea level anomalies exacerbate beach erosion

Sea level anomalies are intra-seasonal increases in water level forced by meteorological and oceanographic processes unrelated to storms. The effects of sea level anomalies on beach morphology are unknown but important to constrain because these events have been recognized over large stretches of continental margins. Here, we present beach erosion measurements along Onslow Beach, a barrier island on the U.S. East Coast, in response to a year with frequent sea level anomalies and no major storms. The anomalies enabled extensive erosion, which was similar and in most places greater than the erosion that occurred during a year with a hurricane. These results highlight the importance of sea level anomalies in facilitating coastal erosion and advocate for their inclusion in beach-erosion models and management plans. Sea level anomalies amplify the erosive effects of accelerated sea level rise and changes in storminess associated with global climate change