Archive for the ‘Hydrology’ category

Late autumn–winter precipitation in northeast Turkey

January 27, 2012

Jex et al. published a short paper in Quaternary Research about speleothem-derived reconstruction of late autumn–winter precipitation in Gümüşhane, northeast Turkey. The observation goes back to ~ AD 1500 leading to the first long winter precipitation reconstruction for this region. Please refer to http://dx.doi.org/10.1016/j.yqres.2011.01.005 for more information.

Source: Ansto

Holocene climate change in central Turkey

December 25, 2011

Last 6000 years climate record from Tecer Lake in central Turkey were published in Holoceneby Kuzucuoğlu et al. According to the mineralogy and grain-size distribution of lake sediments, during the mid-Holocene transition, intense droughts occured at the end of the sixth, fifth and fourth millennia BP. The characteristics of some climatic phases at Tecer seem specific to the location of the sequence which, when compared with other sites in the eastern Mediterranean, may record variations in the extent of different climatic systems. Please refer to doi: 10.1177/0959683610384163

A new tree-ring data from western Anatolia

February 8, 2011

Kose et al. 2011 have published a new data set on May-June precipitation of the Late Holocene obtained from 17 black pine tree-rings. Their study was published in the Journal of Quaternary Research. May–June precipitation reconstructions contain mostly one-year and, less commonly, two-year drought events. The longest consecutive dry period was in between 1925–1928 AD. The driest year was 1887. The wettest years for the entire western Anatolia were determined to be AD 1835, 1876, 1881 and 1901. They claimed that the study provides a better understanding of agricultural drought and management of regional water resources. For more information, please refer to doi:10.1016/j.yqres.2010.12.005

 

Earthquakes cycles recorded in calcite veins

February 8, 2011

Uysal et al. 2011 have published a new study about long term seismic cycles recorded in southwest Anatolian calcite veins. The study appeared in the Journal of Earth and Planetary Science Letters. They conducted high-resolution micro-sampling, high-precision U-series dating and micro- chemical analysis on an extensional vein system in a tectonically active area. U/Th ages of the vein system is in between 23.9±0.2 ka and 11.8±0.2ka. Their study offers an innovative means of constraining the absolute timing of late Quaternary seismic and inter-seismic events in Anatolia, Turkey. For more information, please refer to doi:10.1016/j.epsl.2010.12.039

From Uysal et al. (2011) © 2010 Elsevier

Hydropower energy potential on Coruh River, Turkey

November 7, 2010

Muratli Dam on Coruh River (Source: Akpinar et al.)

A new review paper on hydropower energy potential of Turkey has been published by Akpinar et al. in Renewable and Sustainable Energy Reviews. Akpinar et al. investigated the hydropower plants in the Çoruh river basin, in the NorthEastern Turkey. There are total installed 37 dams and run of river (without storage) hydropower plants developed at various project stages, which corresponds 6.3% of total electricity energy production of Turkey. Please find more information on doi:10.1016/j.rser.2010.10.001.

Water quality in the Kucukcekmece Lake, Istanbul

September 27, 2010

A recent paper published by Taner et al., in the Journal of Ecological Indicators have discussed about the the Lagoon Water Quality Index (L-WQI) of Kucukcekmece Lake, a highly polluted watershed located in western metropolitan Istanbul by focusing on primary problems of the system such as increasing stress on aquatic biota, eutrophication and organic pollution. They used environmental indicators like dissolved oxygen saturation, total nitrogen to total phosphorus ratio, nitrate, orthophosphate, chlorophyll-a, chemical oxygen demand, pH, turbidity and electrical conductivity. The results from Küçükçekmece Lagoon were correlated with the observed water quality trends and reflect the impact of pollution in its tributaries. For more details please refer to doi:10.1016/j.ecolind.2010.08.003

Climate change during and after the LGM in Central Turkey

August 22, 2010

Dogan from Ankara University published a new paper in the Journal of Quaternary International about the fluvial responses of Kizilirmak terraces to Late Quaternary climatic changes. A numerical chronology was established by AMS dating of fluvial sediments and Ar–Ar dating of a basalt sample capping the youngest terrace (Late Pleistocene terrace), indicating that the main incision phase was completed at the end of the LGM (Last Glacial Maximum, ~21,000 years ago). It appears that the major climatic transition from the LGM to the Late Glacial gave rise to aggradation in the fluvial system, and this event seems to be consistent with the timing of the regression phase of pluvial lakes and the termination of paleoglacier advances in the high mountains of Anatolia. doi:10.1016/j.quaint.2009.08.004