Assessment of reservoir sedimentation effect on coastal erosion in the case of Nestos River, Greece

Manolia Andredaki, Anastasios Georgoulas, Vlassios Hrissanthou, Nikolaos Kotsovinos

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Coastal erosion that is generated by the reduction of the annual sediment yield at river outlets, due to the construction of reservoirs, constitutes one of the main environmental problems in many parts of the world. Nestos is one of the most important boundary rivers, flowing through Bulgaria and Greece, characterized by its great biodiversity. In the Greek part of the river, two reservoirs, the Thisavros Reservoir and the Platanovrysi Reservoir, have already been constructed and started operating in 1997 and 1999, respectively. The present paper constitutes the first attempt where the assessment of reservoir sedimentation effect on the coastal erosion for the case of the Nestos River delta and the adjacent shorelines is addressed in detail, through mathematical modeling, modern remote sensing techniques and field surveying. It is found that the construction and operation of the considered reservoirs have caused a dramatic decrease (about 83%) in the sediments supplied directly to the basin outlet and indirectly to the neighbouring coast and that this fact has almost inversed the erosion/accretion balance in the deltaic as well as the adjacent shorelines. Before the construction of the reservoirs, accretion predominated erosion by 25.36%, while just within five years after the construction of the reservoirs, erosion predominates accretion by 21.26%.
Original languageEnglish
Pages (from-to)34-48
Number of pages15
JournalInternational Journal of Sediment Research
Volume29
Issue number1
DOIs
Publication statusPublished - 1 Mar 2014

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coastal erosion
sedimentation
river
accretion
erosion
shoreline
effect
sediment yield
surveying
biodiversity
remote sensing
coast
basin

Bibliographical note

© 2014. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

Keywords

  • Sediment transport
  • Reservoir sedimentation
  • Coastal erosion
  • Shoreline change monitoring
  • Nestos River

Cite this

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title = "Assessment of reservoir sedimentation effect on coastal erosion in the case of Nestos River, Greece",
abstract = "Coastal erosion that is generated by the reduction of the annual sediment yield at river outlets, due to the construction of reservoirs, constitutes one of the main environmental problems in many parts of the world. Nestos is one of the most important boundary rivers, flowing through Bulgaria and Greece, characterized by its great biodiversity. In the Greek part of the river, two reservoirs, the Thisavros Reservoir and the Platanovrysi Reservoir, have already been constructed and started operating in 1997 and 1999, respectively. The present paper constitutes the first attempt where the assessment of reservoir sedimentation effect on the coastal erosion for the case of the Nestos River delta and the adjacent shorelines is addressed in detail, through mathematical modeling, modern remote sensing techniques and field surveying. It is found that the construction and operation of the considered reservoirs have caused a dramatic decrease (about 83{\%}) in the sediments supplied directly to the basin outlet and indirectly to the neighbouring coast and that this fact has almost inversed the erosion/accretion balance in the deltaic as well as the adjacent shorelines. Before the construction of the reservoirs, accretion predominated erosion by 25.36{\%}, while just within five years after the construction of the reservoirs, erosion predominates accretion by 21.26{\%}.",
keywords = "Sediment transport, Reservoir sedimentation, Coastal erosion, Shoreline change monitoring, Nestos River",
author = "Manolia Andredaki and Anastasios Georgoulas and Vlassios Hrissanthou and Nikolaos Kotsovinos",
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Assessment of reservoir sedimentation effect on coastal erosion in the case of Nestos River, Greece. / Andredaki, Manolia; Georgoulas, Anastasios; Hrissanthou, Vlassios; Kotsovinos, Nikolaos.

In: International Journal of Sediment Research, Vol. 29, No. 1, 01.03.2014, p. 34-48.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Georgoulas, Anastasios

AU - Hrissanthou, Vlassios

AU - Kotsovinos, Nikolaos

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PY - 2014/3/1

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N2 - Coastal erosion that is generated by the reduction of the annual sediment yield at river outlets, due to the construction of reservoirs, constitutes one of the main environmental problems in many parts of the world. Nestos is one of the most important boundary rivers, flowing through Bulgaria and Greece, characterized by its great biodiversity. In the Greek part of the river, two reservoirs, the Thisavros Reservoir and the Platanovrysi Reservoir, have already been constructed and started operating in 1997 and 1999, respectively. The present paper constitutes the first attempt where the assessment of reservoir sedimentation effect on the coastal erosion for the case of the Nestos River delta and the adjacent shorelines is addressed in detail, through mathematical modeling, modern remote sensing techniques and field surveying. It is found that the construction and operation of the considered reservoirs have caused a dramatic decrease (about 83%) in the sediments supplied directly to the basin outlet and indirectly to the neighbouring coast and that this fact has almost inversed the erosion/accretion balance in the deltaic as well as the adjacent shorelines. Before the construction of the reservoirs, accretion predominated erosion by 25.36%, while just within five years after the construction of the reservoirs, erosion predominates accretion by 21.26%.

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