黑料网

Abstract

The Arian photographic analysis and satellite images allowed us to determine the evolution of some geological phenomena such as the problem of erosion that affects most of the Moroccan beaches which nowadays becomes a global issue not only national. The furniture beach of Tangier Bay is considered one of the most Moroccan beaches threatened by erosion effect in this work it was noticed that the Bay of Tangier had a change in morphology along a period that stretches between 1972 and 1997. The period between 1972-1981 shows generalized erosion with a rate of 4 m/year. The period of 1981-1997 registers a restoring of the average trend with the formation of three sectors; the first one in erosion, the second sector is stable and the third in accretion. Because of its farness from the production zones, the sandy beach evolves in a closed system. On the other hand, the development of the western hillside immobilized the sandy materials that do not contribute anymore to the current solid contribution. Finally, the long shore drift which redistributes the pebbles brought by the oued halou is broken by the construction of a defense system. At present, the erosion that drew sediments of the beach from the most easterly beach to accrete that western portion cannot find more materials because of the erosion and of the quasi total occupation of the beach. The repairing of the beach further to successive storms is more difficult. This reality is already felt in 2006. On the other hand, a portion of the clayey coastal cliff of Tangier bay, the reconstruction of the natural coastal system and the monitoring of the successive developments in the bay show that the anthropization of the coast has unbalanced the system in an irreversible way.

Biography

Sara Meriyeg has completed her Bachelor?s from the University of Science and Technics of B閚i-Mellal in development and environmental management. After she completed her studies and get her degree as an Application Engineer in Environment science from the faculty of science and technics of Tangier in 2014 she had an international Master ?EXPO Master integrated coastal zone management? between three of the main universities in the world: Pavia University in Italy, Tongji University in China and finally Chonnam University in South Korea. She attended many international congress related to the field of oceanography; the last one was in China: Seminar of coastal Geology and Integrated Management organized by GEO-Coasts and Tongji University, Qingdao, China. Now she is a second year PhD student in the faculty of science and technics of B閚i-Mellal, Morocco. Her research focuses on the problem of contamination of soil and ground water by pesticides and nitrates in the region of Tadla.