Rise and Intrusion of Caspian Sea Water into Mazandaran Province Coastal Landsby Mirkhalegh Ahmadi, Coll of Agri Sci, Sari, Iran,
Document Type: Proceeding Paper
Part of: Coastal Zone '91
The Caspian sea water level was -29.13m (MSL) in 1977 and reached -27.68m in 1987. Although the rise and fall in the sea water level has been recognized as a periodic phenomenon (every about 40 years), the recent rise created several environmental problems including destruction of buildings, inundation of lowlands and intrusion of saline sea water into and on the productive agricultural lands. The measured average electrical conductivity of the sea water is about 20 dS/m and its rise and intrusion affected the rivers and existing drainage canals for about 2 Kilometers off-shore. The traditional rice fields are in danger of severe salinization now. Overdraft from water wells, usually less than 100 meters apart, is another increasing problem in the region which is creating a negative hydraulic gradient toward sea and enhancing the hazard of sea water intrusion into coastal lowlands.
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