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    ANALYSIS OF DROUGHT IN THE MARMARA REGION USING THE STANDARDIZED PRECIPITATION INDEX
    (Parlar Scientific Publications (P S P), 2009) Mengue, Guelay Pamuk; Anac, Sueer; Topcuoglu, Kivanc
    Drought is one of the most damaging climate-related hazards. The economic, social and agricultural impacts of drought have increased significantly in recent years. In this study, drought analysis in the Marmara region was examined using, the Standardized Precipitation Index (SPI) as a drought index. Monthly precipitation data in the region for the period of 1975 to 2005 were used to calculate the annual, quarterly and monthly SPI at 32 stations. The longest and most intensive droughts were recorded in 1977, 1989, 1990, 1992 and 1993. Conversely, 1975, 198 1, 1997, 1998 and 2005 were wet years.
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    Special Issue: Production of Safe Water - Preface
    (Springer, 2010) Kabay, Nalan; Kim, Kyoung-Woong; Bryjak, Marek; Yoshizuka, Kazuharu; Anac, Sueer
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    Trends of precipitation and stream-flow in Gediz river basin, Western Turkey
    (Parlar Scientific Publications (P S P), 2007) Kukul, Yasemin S.; Anac, Sueer; Yesilirmak, Ercan; Moraes, Jorge M.
    In this study, it was attempted to interpret the trends in annual precipitation totals and annual mean stream-flow records in Gediz basin located in Western Turkey. The data used consisted of 1966-1998 records of 14 precipitation and 4 stream-flow gauging stations. The trend analysis was performed by applying sequential versions of non-parametric statistical Mann-Kendall and Pettitt tests. The results showed a decreasing tendency for annual precipitation with change points in the beginning of the 1980s and similar downward trends for stream-flow records with change points concentrated around the mid-1980s. This trend of stream-flow pattern in the basin could be directly explained by precipitation decrease during the same period. All the trends of hydro-climatic variables were entirely consistent with those identified in recent studies carried out in Turkey and several southern Mediterranean countries.