Frequency analysis of low flows in intermittent and non-intermittent rivers from hydrological basins in Turkey | Zendy

Ebru Eriş | Zendy; Hafzullah Aksoy | Zendy; Bihrat Önöz | Zendy; Mahmut Çetin | Zendy; Mehmet İshak Yüce | Zendy; Bülent Selek | Zendy; Hakan Aksu | Zendy; Halil İbrahim Burgan | Zendy; Musa Eşit | Zendy; Isilsu Yildirim | Zendy; Ece Unsal Karakus | Zendy

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Frequency analysis of low flows in intermittent and non-intermittent rivers from hydrological basins in Turkey

Author(s) -

Ebru Eriş,

Hafzullah Aksoy,

Bihrat Önöz,

Mahmut Çetin,

Mehmet İshak Yüce,

Bülent Selek,

Hakan Aksu,

Halil İbrahim Burgan,

Musa Eşit,

Isilsu Yildirim,

Ece Unsal Karakus

Publication year - 2018

Publication title -

water science and technology water supply

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.318

H-Index - 39

eISSN - 1607-0798

pISSN - 1606-9749

DOI - 10.2166/ws.2018.051

Subject(s) - weibull distribution , probability distribution , probability density function , statistics , mathematics , generalized extreme value distribution , return period , flow (mathematics) , structural basin , gamma distribution , distribution (mathematics) , hydrology (agriculture) , extreme value theory , geology , geography , mathematical analysis , geometry , geomorphology , archaeology , geotechnical engineering , flood myth

This study attempts to find out the best-fit probability distribution function to low flows using the up-to-date data of intermittent and non-intermittent rivers in four hydrological basins from different regions in Turkey. Frequency analysis of D = 1, 7, 14, 30, 90 and 273-day low flows calculated from the daily flow time series of each stream gauge was performed. Weibull (W2), Gamma (G2), Generalized Extreme Value (GEV) and Log-Normal (LN2) are selected among the 2-parameter probability distribution functions together with the Weibull (W3), Gamma (G3) and Log-Normal (LN3) from the 3-parameter probability distribution functions family. Selected probability distribution functions are checked for their suitability to fit each D -day low flow sequence. LN3 mostly conforms low flows by being the best-fit among the selected probability distribution functions in three out of four hydrological basins while W3 fits low flows in one basin. With the use of the best-fit probability distribution function, the low flow-duration-frequency curves are determined which has the ability to provide the end-users with any D -day low flow discharge of any given return period.

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