THE LAKES OF THE ROMANIAN BLACK SEA COAST. MAN-INDUCED CHANGES, WATER REGIME, PRESENT STATE
Unlike other regions in Romania, lakes in Dobrogea are marginally positioned – closely connected to the presence of the Danube and the Black Sea. This characteristic/position is the result of paleogeographical evolution in the Quaternary and the current climatic conditions in Dobrogea. The paleogeog...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Publishing House of the Romanian Academy
2016-07-01
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| Series: | Revue Roumaine de Géographie |
| Subjects: | |
| Online Access: | http://www.rjgeo.ro/atasuri/revue%20roumaine%2060_1/Gastescu%20et%20al.pdf |
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| Summary: | Unlike other regions in Romania, lakes in Dobrogea are marginally positioned – closely connected to the presence of the Danube and the Black Sea. This characteristic/position is the result of paleogeographical evolution in the Quaternary and the current climatic conditions in Dobrogea. The paleogeographical evolution in the Quaternary resulted in the formation of several depressions at the edges of dry land, where fresh and salt/sea water accumulated. The lakes on the Romanian coast line are grouped into two types of genetic depressions, a fact partially reflected in their hydrological and physical-chemical properties – fluvial-marine limans and marine lagoons. Regarding limans, we would mention the largest one – Babadag, grafted into the valley of the two Northern Dobrogea rivers, Taiţa and Teliţa, situated on the western side of the Razim-Sinoie lagoon (the largest lacustrine complex in Romania); Taşaul, initially located at the mouth of the Casimcea River, flows into the Black Sea; Techirghiol, after the conflence of the two tributaries, Urlichioi (Derea) and Biruinţa; Tatlageac, at the end of the Dulceşti (Tatlageac) Valley, and Mangalia, in the Albeşti Valley. The most notable lagoon, by surface-area, is the Razim-Sinoie lake complex; the Siutghiol Lake, the old Comorova Marsh which drained, resulted in three recreational lakes – Neptun, Cozia, and Jupiter, as well as the Herghelia-Mangalia Marsh. In terms of drainage-basin size, underground water-sources, links to coastal marine waters, and the semiarid, temperate-continental climate of Dobrogea, the spectrum of the chemical composition-mineralisation gradient of lake water, in natural conditions, varied and still varies from fresh, brackish, salty and hypersalty water. Man-induced changes of the lacustrine area, of drainage basins and of the links to coastal marine waters have resulted in significant structural modifications of the lacustrine ecosystems,
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| ISSN: | 1220-5311 1220-5311 |