Browsing by Author "Şişman, Eyüp"
Now showing items 1-20 of 24
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Air quality (AQ) identification by innovative trend diagram and AQ index combinations in Istanbul megacity
Güçlü, Yavuz Selim; Dabanlı, İsmail; Şişman, Eyüp; Şen, Zekâi (Turkish National Committee for Air Pollution and Control (TUNCAP), 2019)Istanbul is one of the megacities with population over 14 million, where the most intensive economic and social human activities take place in Turkey with unprecedented energy consumption and extravagant life style. These ... -
The application of piecewise ITA method in Oxford, 1870-2019
Şişman, Eyüp; Kızılöz, Burak (Springer Wien, 2021)In this study, the trends, stabilities of temperature, and rainfall data have been analyzed in detail for hydrometeorology time series recorded since 1870 in Oxford city in England. The innovative trend analysis (ITA) ... -
Artificial neural network system analysis and Kriging methodology for estimation of non-revenue water ratio
Şişman, Eyüp; Kızılöz, Burak (IWA Publishing, 2020)The non-revenue water (NRW) ratio parameter is significantly important for performance evaluation of water distribution systems. In order to evaluate the NRW ratio, the variables influencing this parameter should be ... -
Basınçlı akifer parametrelerinin şen eğim eşleştirme yöntemi ile belirlenmesi ve risk analizi
Şişman, Eyüp (2019)Yeraltı jeolojik tabakaları genelde rastgele yapıda olduğundan, akiferlerin potansiyelinin belirlenmesindekullanılan parametreler konum ve zamanla değişir. Tektür (homojen) ve tekyönlü (izotrop) kabul edilenortamlarda, bu ... -
Climate change impacts on sea surface temperature (SST) trend around Turkey seashores
Dabanlı, İsmail; Şişman, Eyüp; Güçlü, Yavuz Selim; Birpınar, Mehmet Emin; Şen, Zekai (Springer International Publishing AG, 2021)This paper focuses on sea surface temperature (SST) trends due to the importance of temperature difference in climate change impact research. These trends are not only essential for climate, but they are also important for ... -
Discussion of "Critical Values for Sen's trend analysis" by Richard H. McCuen
Şişman, Eyüp; Güçlü, Yavuz Selim; Dabanlı, İsmail (American Society of Civil Engineers (ASCE), 2020)It is well appreciated that the author of the original paper tried toavoid the qualitative subjectivity and proposed a quantitative approach for trend identification in a given hydrometeorology timeseries. He considered ... -
Ege ve Akdeniz kıyılarında deniz suyu sıcaklıkları için soğuma döneminde trend analizleri
Şişman, Eyüp (Artvin Çoruh Üniversitesi Doğal Afetler Uygulama ve Araştırma Merkezi, 2019)Eğilim araştırmalarında regresyon analizi ve sıklıkla kullanılan Mann-Kendall (MK) yöntemi gibi klasik yaklaşımlar kısıtları ve varsayımları sebebiyle bağlayıcı şartları ve ürettikleri bilgi açısından da ihtiyacı ... -
Exceedance probabilities of non-revenue water and performance analysis
Kızılöz, Burak; Şişman, Eyüp (Springer, 2021)Water utilities evaluate the water distribution system performances by taking various performance indicators into consideration. However, it is necessary to digitize the current network characteristics and to provide ... -
Gelir getirmeyen su oranı tahmin modelleri
Kızılöz, Burak; Şişman, Eyüp (Niğde Ömer Halisdemir Üniversitesi, 2021)Bu araştırmada Gelir Getirmeyen Su Oranı (GGSO) tahminleri, Kocaeli’nin en fazla su kaybı yaşanan altı ilçesinin 2018 ve2019 yıllarına ait iki yıllık verisi dikkate alınarak ve tüketilen su miktarı, şebeke uzunluğu, servis ... -
Improving of the angstrom-prescott model using harmonic analysis
Güçlü, Yavuz Selim; Dabanlı, İsmail; Şişman, Eyüp; Şen, Zekai (Springer Verlag, 2018)The solar energy as one of the most important energy sources is investigated for effective use in a variety of areas. Especially, with the tendency of depletion of fossil fuel consumption as well as their greenhouse gas ... -
Innovative Polygon Trend Analysis (IPTA) and applications
Şen, Zekâi; Şişman, Eyüp; Dabanlı, İsmail (Elsevier, 2019)Trend analysis is continuously in the research and application agenda due to climate change effect searches on various engineering, social, economic, agriculture, environmental and water resources design, management, ... -
Innovative triangular trend analysis
Güçlü, Yavuz Selim; Şişman, Eyüp; Dabanlı, İsmail (Springer, 2020)In this study, based on the Sen innovative trend analysis (ITA) method, another approach has been developed as innovative triangular trend analysis (ITTA), which helps to identify partial trends within a given time series ... -
A new innovative method for model efficiency performance
Şen, Zekai; Şişman, Eyüp; Kızılöz, Burak (IWA Publishing, 2022)In every aspect of scientific research, model predictions need calibration and validation as their representativity of the record measurement. In the literature, there are a myriad of formulations, empirical expressions, ... -
A new performance analysis model for urban water supply systems evaluation
Kızılöz, Burak; Şişman, Eyüp (Desalination Publications, 2021)Non-revenue water (NRW) is among the performance indicators that have a great importance in urban water distribution systems. In this study, the probability statistical approach used to compare the temporal variations of ... -
Non-Revenue water ratio prediction with serial triple diagram model
Kızılöz, Burak; Şişman, Eyüp (IWA Publishing, 2021)Water administrations attempt to control the Non-Revenue Water Ratio (NRWR) values in sustainable and well-performing water distribution infrastructures. In this respect, the NRWR value prediction through appropriate models ... -
Physical and practical hydrograph recession modeling in karstic sinkholes
Şen, Zekai; Dabanlı, İsmail; Şişman, Eyüp (IWA Publishing, 2020)Karstic spring discharge is related to the hydraulic head recession through a power function with an exponent <1. In the literature, analytical solutions are available for exponential and non-exponential models based on a ... -
Piecewise wet and dry spell duration-number relationship and possible climate change impact identification in Turkey
Şişman, Eyüp (Springer, 2019)Wet (dry) spells correspond to successive surplus (deficit) in hydro-meteorology daily, weekly, monthly, or annual records according to above (below) of a given any threshold parameter value such as arithmetic average, ... -
Power law characteristics of trend analysis in Turkey
Şişman, Eyüp (Springer Wien, 2021)Trend identification analyses in any hydrometeorological data are necessary and critical for predictions and planning in many disciplines such as atmospheric, environmental, and oceanographic sciences; water engineering; ... -
Predicting a water infrastructure leakage index via machine learning
Kızılöz, Burak; Şişman, Eyüp; Oruç, Halil Nurullah (Elsevier Ltd, 2022)In this study, the infrastructure leakage index (ILI) indicator that is preferred frequently by the water utilities with sufficient data to determine the performances of water distribution systems is modeled for the first ... -
Self-similar characteristics of drought duration, total deficit, and intensity curves
Şişman, Eyüp (Springer, 2020)Droughts are among the creeping extreme events with meteorological, hydrological, agricultural, and even social impacts. Due to their complex occurrences, drought identification and prediction need simple, effective, ...
