FİKRET USTAOĞLU, A. YALÇIN TEPE, Handan AYDIN, Abuzer AKBAŞ

Investigation of Water Quality and Pollution Level of Lower Melet River, Ordu, Turkey

Some water quality parameters of the Lower Melet River were determined by taking monthly samples, starting in October 2013 and end up in September 2014. The means obtained data were given as (min–max) mean as follow; pH;(6.93 – 8.8) 7.96, dissolved oxygen (DO);(5.4-15.4) 11.4 mgL-1 , saturation (%);(59-201) 117, temperature;(4.6-27.2) 14°C, total dissolved solid (TDS);(106-320) 161 mgL-1 , conductivity (EC);(124-520) 216 µScm-1 , salinity;(0-0.4) 0.11 ppt, biochemical oxygen demand (BOD5);(0.6-4.8) 2.3 mgL-1 , total alkalinity (TA);(55-100) 79 mgL-1 CaCO3, total hardness (TH); (70-125) 97 mgL-1 CaCO3, chlorophyll-a;(1.6-10.4) 3.78 µgL-1 , total ammonia nitrogen (TAN); (0.33-1.27) 0.53 mgL-1 , total phosphate (TP);(0.08-0.85) 0.40 mgL-1 soluble reactive phosphorus (SRP); (0.01-0.12) 0.04 mgL-1 , chlorine;(0.04-0.75) 0.19 mgL-1 , silica;(2.37-6.08) 4.51 mgL-1 , phenol; (0.04-1.77) 0.43 mgL-1 , nitrite; (0.01-0.12) 0.04 mgL-1 , nitrate;(0.29-3.39) 1.22 mgL-1 , sulphite;(1.93-3.65) 2.34 mgL-1 , sulphate;(1.62-13.29) 10.42 mgL-1 , surfactant (anionic);(0.33-1.62) 0.97 mgL-1 , potassium;(2.75-15.4) 7.2 mgL-1 , total suspended solids (TSS);(8.45-147.7) 49.75 mgL-1 , and redox potential ;(-156 / -28) -86.78 mV. Sediment organic matter % and pH were averaged as (2.9-9.1) 5.77 and (6.71-8.3) 7.53, respectively. Obtained data showed that the water quality of Melet River may suitable for irrigation but may not be a suitable living habitat for the living beings. According to the class of surface water quality regulation getting into the category of mild contaminated according it’s average total phosphate rate of 0.40 mgL-1 , TAN level of 0.53 mgL-1 , nitrite rate of 0.04 mgL-1 and severely contaminated according it’s average surfactant (anionic) level of 0.97 mgL-1 and phenol level of 0.43 mgL-1 .

Aşağı Melet Irmağının bazı su kalitesi parametrelerinin belirlendiği bu çalışma Ekim 2013 ile Eylül 2014 tarihleri arasında aylık su örnekleri toplanarak yürütülmüştür. Elde edilen veriler minimum, maksimum ve ortalama değerler şeklinde sunulmuştur; pH;(6,93–8,8) 7,96, Çözünmüş oksijen (ÇO);(5,4-15,4) 11,4 mgL-1 , saturasyon; % (59-201) 117, sıcaklık;(4,6-27,2) 14°C, toplam çözünmüş madde (TÇM);(106-320) 161 mgL-1 ,İletkenlik; (124-520) 216 µScm-1 , Tuzluluk;(0-0,4) 0,11 ppt, biyolojik oksijen ihtiyacı (BOİ5); (0,6-4,8) 2,3 mgL-1 , toplam alkalinite (TA); (55-100) 79 mgL-1 CaCO3 toplam sertlik (TS); (70-125) 97 mgL-1 CaCO3, klorofil-a; (1,6-10,4) 3,78 µgL-1 , toplam amonyak azotu (TAN);(0,33-1,27) 0,53 mgL-1 toplam fosfor (TF);(0,08-0,85) 0,40 mgL-1 çözünebilir reaktif fosfat (ÇRF);(0,01-0,12) 0,04 mgL-1 , klorür; (0,04-0,75) 0,19 mgL-1 , silisyum; (2,37-6,08) 4.51 mgL-1 , fenol; (0,04-1,77) 0,43 mgL-1 , nitrit; (0,01-0,12) 0,04 mgL-1 , nitrat;(0,29-3,39) 1,22 mgL-1 , sülfit;(1,93-3,65) 2,34 mgL-1 , sülfat;(1,62-13,29) 10,42 mgL-1 , anyonik deterjan;(0,33-1,62) 0,97 mgL-1 , potasyum;(2,75- 15,4) 7,2 mgL-1 , askıda katı madde (AKM);(8,45-147,7) 49,75 mgL-1 , ve redox potansiyeli; (- 156/-28) -86,78 mV. Sediment organik madde oranı % (2,9-9,1) 5,77 ve sediment pH’ı (6,71- 8,3) 7,53 bulunmuştur. Elde edilen verilere göre Melet Irmağının sulama için uygun ancak yaşayan habitat için uygun olmadığı belirlenmiştir. Yerüstü Su Kalitesi Yönetmeliği’ne göre 0,40 mgL-1 fosfat, 0,53 mgL-1 TAN, 0,04 mgL-1 nitrit seviyeleri ile orta derece kirli ve 0,97 mgL-1 surfaktant(anyonik) ve 0,43 mgL-1 fenol oranlarıyla ciddi derecede kirli su sınıfına girmektedir.

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