scholarly journals Analisis Kualitas Perairan Bolaang Mongondow, Sulawesi Utara Berdasarkan Parameter Fisika-Kimia Air Laut

2021 ◽  
Vol 24 (1) ◽  
pp. 113-122
Author(s):  
Simon I. Patty ◽  
Fione Yukita Yalindua ◽  
Putri Sapira Ibrahim
Keyword(s):  
Dissolved Oxygen ◽  
Sea Water ◽  
Light Transmission ◽  
Water Clarity ◽  
Transmission Method ◽  
Coast Line ◽  
North Sulawesi ◽  
Physico Chemical ◽  
Phosphate Nitrate

Bolaang Mongondow waters in North Sulawesi is very important estuarine waters due to both land and ocean influenced oceanographic conditions. Observations of water quality along Bolaang Mongondow coast-line have been carried out in February 2019. This study aim to analyze the quality of sea water based on the physico-chemical parameters of Bolaang Mongondow waters. The parameters observed includes temperature, the clarity of water, salinity, dissolved oxygen (DO), phosphate, nitrate and PH. Samplings were conducted using Nansen tube on the surface layer (0-1 m) and near the bottom (> 15 m) on 9 research stations along Bolaang Mongondow coast-line. Measurements of temperature, salinity, brightness and pH are carried out in situ. Dissolved oxygen was measured via electrochemical method using AZ 8563 DO meter. Phosphate and nitrate were analyzed according to the light transmission method by using the 'Nicolet Evolution 100' spectrophotometer. The results obtained are water temperature ranging from 28.6-29.3 oC; salinity 28.0-32.5 o/oo; water clarity of 7.0-14.5 m; pH 7.36-7.80; dissolved oxygen 4.83-6.41 ppm; phosphate 0,005-0,0230 mg/l and nitrate 0,005-0,0090 mg/l. The statistical analysis using t-test showed that phosphate and dissolved oxygen in the water surface and close to the bottom of water were significantly different (t-hit> t-tab). The calculated index poluion calculation shows that the waters of Bolaang Mongondow ranged between unpolluted and lightly polluted. Variations in temperature, water clarity, salinity, dissolved oxygen, phosphate, nitrate and pH obtained in this study are still adequate to sustain marine life. Perairan Bolaang Mongondow, Sulawesi Utara adalah perairan estuari yang mempunyai peran penting karena kondisi  oseanografi dipengaruhi oleh aktivitas yang di berasal dari daratan maupun laut. Pengamatan kualitas air laut di wilayah perairan Bolaang Mongondow telah dilaksanakan pada bulan Februari 2019. Tujuan dari penelitian adalah untuk mengukur kualitas perairan berdasarkan parameter fisik-kimia air laut. Parameter yang diteliti meliputi suhu, salinitas, kecerahan, oksigen terlarut, fosfat, nitrat, dan pH . Sampel air laut diambil menggunakan tabung Nansen pada lapisan kedalaman permukaan air (0-1 m) dan perairan yang mendekati dasar (> 15 m) pada 9 stasiun penelitian. Pengukuran suhu, kecerahan, salinitas dan pH dilakukan secara langsung di lapangan. Pengukuran oksigen terlarut, fosfat dan nitrat dilakukan di laboratorium dengan metode elektrokimia menggunakan DO meter AZ-8563. Untuk oksigen terlarut dan metode transmisi cahaya dengan alat spektrofotometer ‘Nicolet Evolution 100’ untuk fosfat dan nitrat.  Hasil yang diperoleh yaitu suhu air berkisar antara 28,6-29,3 oC; salinitas 28,0-32,5 o/oo; kecerahan 7,0-14,5 m; pH 7,36-7,80; oksigen terlarut 4,83-6,41 ppm; fosfat 0,005-0,0230 mg/l dan nitrat 0,005-0,0090 mg/l. Oksigen terlarut dan fosfat yang terdapat di permukaan dan dekat dasar laut menunjukkan adanya perbedaan nyata (t-hit>t-tab) dengan menggunakan analisis uji t. Berdasarkan nilai indeks pencemaran menunjukkan perairan Bolaang Mongondow berada dalam kondisi baik hingga tercemar ringan. Variasi suhu, kecerahan, salinitas,  oksigen terlarut, fosfat, nitrat dan PH yang diperoleh masih berada dalam kisaran angka normal untuk kehidupan biota laut.

scholarly journals Dissolved Oxygen and Apparent Oxygen Utilization in Lembeh Strait Waters, North Sulawesi

2017 ◽  
Vol 6 (1) ◽  
pp. 54
Author(s):  
Simon I Patty
Keyword(s):  
Surface Layer ◽  
Dissolved Oxygen ◽  
Sea Water ◽  
Negative Impact ◽  
Quality Standards ◽  
Water Quality Standards ◽  
Oxygen Utilization ◽  
North Sulawesi ◽  
Lembeh Strait ◽  
Apparent Oxygen Utilization

The observation of dissolved oxygen level and Apparent Oxygen Utilization (AOU) in Lembeh Strait Waters was conducted in January, February, June and July 2016. The objective of this research is to know the condition of dissolved oxygen and Apparent Oxygen Utilization (AOU). The results of the analysis showed that dissolved oxygen levels in the surface layer and near the bottom ranged from 6.00-6.56 mg/l and 5.59-6.17 mg/l. Based on the values of temperature and salinity obtained from this study, solubility, oxygen saturation degree and AOU value at the surface layer were calculated. In the surface layer the AOU values are positive, ranging from 0.10-0.72 mg/l, while near the bottom, negative and positive AOU values were balanced, ranging from -0.23-0.42 mg/l. The concentration of dissolved oxygen in the Lembeh Strait waters has not shown negative impact on the aquatic environment and is still in accordance with sea water quality standards for marine biota.Keywords: Dissolved oxygen, apparent oxygen utilization (AOU), Lembeh Strait. ABSTRAK         Pengamatan kadar oksigen terlarut dan Apparent Oxygen Utilization (AOU) di Perairan Selat Lembeh dilaksanakan pada bulan Januari, Februari, Juni dan Juli 2016. Penelitian ini bertujuan untuk mengetahui kondisi oksigen terlarut dan Apparent Oxygen Utilization (AOU). Hasil analisa menunjukkan bahwa kadar oksigen terlarut di lapisan permukaan dan dekat dasar berkisar antara 6,00-6,56 mg/l dan 5,59-6,17 mg/l. Berdasarkan nilai suhu dan salinitas yang diperoleh dari penelitian ini telah dihitung daya larut, derajat kejenuhan oksigen dan nilai AOU pada lapisan permukaan. Di lapisan permukaan nilai AOU semuanya positip berkisar antara 0,10-0,72 mg/l dan di dekat dasar nilai AOU negatip dan positip berimbang, berkisar antara       -0,23-0,42 mg/l. Konsentrasi oksigen terlarut di perairan Selat Lembeh belum menunjukkan dampak negatip terhadap lingkungan perairan dan masih sesuai dengan baku mutu air laut untuk biota laut. Kata Kunci: Oksigen terlarut, apparent oxygen utilization (AOU), Selat Lembeh.

scholarly journals Surface Water and Groundwater Quality Evaluation in a Mining Area

2020 ◽  
Vol 71 (6) ◽  
pp. 124-131
Author(s):  
Alina Cochiorca ◽  
Valentin Nedeff ◽  
Narcis Barsan ◽  
Ion Sandu ◽  
Emilian Mosnegutu ◽  
...  
Keyword(s):  
Surface Water ◽  
Dissolved Oxygen ◽  
Mining Area ◽  
Chemical Parameters ◽  
Chemical Indicators ◽  
Surface Water And Groundwater ◽  
Physico Chemical ◽  
Three Rivers

This paper presents a monitoring of groundwater and surface water in the mining area Tg. Ocna, by analyzing 16 physico-chemical parameters (pH, turbidity, dissolved oxygen, Pb, Ni, Cu, Fe, Mn, Zn, Cr, Mg, SO42-, Al, NO2-, NO3-, NH4+), from three rivers Slanic, Trotus and Valcele, a small lake Groapa Burlacu, a fountain and three monitoring drilling wells (F11, F16 and F17). Studies on the quality of surface water and groundwater in areas near mines are important due to extraction and exploitation of salt. The samples were collected in April 2019. Following the analyzes, their results are included in the following concentration ranges: pH 7.21 to 8.46 unit. pH, turbidity 0.54 to 169 NTU, dissolved oxygen 6 to 8.59 mg/L, Pb 0.075 to 0.095 mg/L, Ni 0.026 to 1.05 mg/L, Cu 0.088 to 0.809 mg/L, NO2- 0.001 to 0.037 mg/L and NO3- 0.290 to 4.34 mg/L. The pH, turbidity and dissolved oxygen were measured in situ using portable equipment�s. As for the other parameters, they were analyzed in the water laboratory from Vasile Alecsandri University of Bacau by using spectrophotometry. Some concentrations of the physico-chemical indicators of the water samples analyzed were found to be more than the water quality classes.

scholarly journals Characteristics of Phosphate, Nitrate and Dissolved Oxygen in Gangga and Siladen Island Waters, North Sulawesi

2014 ◽  
Vol 2 (2) ◽  
pp. 74
Author(s):  
Simon I. Patty
Keyword(s):  
Statistical Analysis ◽  
Indian Ocean ◽  
Dissolved Oxygen ◽  
Spectrophotometric Method ◽  
Water Mass ◽  
Marine Resources ◽  
North Sulawesi ◽  
Phosphate Nitrate ◽  
The Indian Ocean ◽  
Oceanographic Conditions

Waters of Gangga and Siladen island, North Sulawesi is very important due to their terrestrial-influenced  oceanographic conditions of the Celebes Sea and the Indian Ocean that is rich in marine resources.  Research on the characteristics of the water mass in relation with nutrients, phosphate, nitrate and dissolved oxygen were carried out in the waters Gangga island (May 2011) and Siladen island (July 2011). Phosphate and nitrate levels were analyzed using spectrophotometric method using Nicolet Evolution 100 spectrophotometer, while dissolved oxygen was determined by electrochemical methods. Statistical analysis showed that the nitrate levels in the waters of the Gangga island to the Siladen island is significantly different, while the phosphate and dissolved oxygen levels were not significantly different. The fluctuative concentration of phosphate, nitrate and dissolved oxygen in the Gangga  and Siladen  island waters were influenced by current, the mmovement of water mass, plankton activity and input from the surrounding mainland. Keywords: Phosphate, nitrate, dissolved oxygen, gangga, siladen, north sulawesi. ABSTRAK Perairan pulau Gangga dan pulau Siladen, Sulawesi Utara merupakan perairan yang sangat penting karena kondisi oseanografinya di pengaruhi daratan, Laut Sulawesi dan Samudera Hindia sehingga kaya akan sumber daya laut. Penelitian tentang karakteristik massa air kaitannya dengan zat hara fosfat, nitrat dan oksigen terlarut telah dilakukan di perairan pulau Gangga (Mei 2011) dan pulau Siladen (Juli 2011). Kadar fosfat dan nitrat dianalisa dengan menggunakan metode spektrofotometri dengan menggunakan alat spektrofotometer Nicolet Evolution 100, sedangkan oksigen terlarut ditentukan dengan metoda elektrokimia. Hasil analisis statistik menunjukkan bahwa kadar nitrat di perairan pulau Gangga dengan pulau Siladen adalah berbeda sangat nyata, sedangkan kadar fosfat dan oksigen terlarut tidak berbeda nyata. Tinggi rendahnya kosentrasi fosfat, nitrat dan oksigen terlarut di perairan pulau Gangga dan pulau Siladen dipengaruhi oleh arus, pergerakan massa air, aktifitas plankton dan masukan dari daratan.   Kata kunci: Fosfat, nitrat, oksigen terlarut, Gangga, Siladen, Sulawesi Utara.

scholarly journals Preliminary Observations of Zooplankton in Pulau Tinggi, Marine Park, Johor, Malaysia

2018 ◽  
Vol 7 (4.30) ◽  
pp. 94
Author(s):  
Nasir Shuaib ◽  
Maryati Mohammad ◽  
Hazel Monica Matias- Peralta ◽  
Mohd Saifullah Rusiman ◽  
Shuaibu Babaji Sanusi
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Dissolved Oxygen ◽  
Water Samples ◽  
Quality Parameters ◽  
Chemical Parameters ◽  
Marine Park ◽  
Physico Chemical ◽  
Abundance And Diversity

Zooplankton was studied in Pulau Tinggi, Marine Park, Johor, Malaysia for their abundance and species diversity. Water samples were collected within three months, April, June and October 2015.Ten sampling stations were established during the study period. A total of 54 species of copepods from 29 genera and 22 families were identified. An average of 86.70 % copepods and 15.84% non-copepods were recorded among the zooplankton groups. The water quality parameters such as depth, dissolved oxygen, pH, temperature, turbidity, and salinity were measured in situ.  The present study was taken to observe the abundance and diversity of zooplankton in Pulau Tinggi, Johor. This research will be helpful for fisheries authorities and marine controlling departments. The effect of different physico-chemical parameters on the biomass and density of zooplankton will be discussed in the coming paper.

scholarly journals Level of Phosphate, Nitrate and Dissolved Oxygen in Talise Island Waters, North Sulawesi

2014 ◽  
Vol 1 (4) ◽  
pp. 167 ◽  
Author(s):  
Simon I Patty
Keyword(s):  
Dissolved Oxygen ◽  
Spectrophotometric Method ◽  
Nitrate Concentration ◽  
Aquatic Organisms ◽  
Electrochemical Methods ◽  
Oxygen Levels ◽  
North Sulawesi ◽  
Phosphate Nitrate ◽  
Concentration Measurements ◽  
Micro Organisms

Phosphate and nitrate are a source of food for micro-organisms, while dissolved oxygen is required in the process of respiration in variety of aquatic organisms. Observations of phosphate, nitrate and dissolved oxygen levels have been conducted in the waters of Talise Island, North Sulawesi. Phosphate and nitrate concentration measurements carried out using spectrophotometric method, while dissolved oxygen was determined by electrochemical methods. Overall observations of phosphate, nitrate and dissolved oxygen levels in Talise Island waters, ranging between 0.005 to 0.056 mg/l, 0.012 to 0.034 mg/l and 5.05 to 6.01 ppm, respectively. Levels of phosphate, nitrate and dissolved oxygen in Talise Island Waters were still considered normal and suitable for marine life.Keywords : Phosphate, nitrate, dissolved oxygen,Talise Island, North Sulawesi

scholarly journals Analisis kualitas fisika kimia air di areal budidaya ikan Danau Tondano Provinsi Sulawesi Utara

2013 ◽  
Vol 1 (2) ◽  
Author(s):  
Richard Maniagasi ◽  
Sipriana S. Tumembouw ◽  
Yoppy Mudeng
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Water Temperature ◽  
In Situ Measurement ◽  
North Sulawesi ◽  
Physical Chemical ◽  
Aquaculture Area ◽  
Laboratory Water

ABSTRACT The objective of this research was to analyse the water physical-chemical qualities at aquaculture area in Lake Tondano North Sulawesi. Water quality was measured in situ and in laboratotium. In situ measurement included temperature, pH, and turbidity, while in laboratory, water quality measured included dissolved oxygen, nitrogen, phosphate. It was found that water temperature ranged from 25 - 27 o C, turbidity 0.20 - 4,0 m, and dissolved oxygen 5 – 9 mg/L, Nitrogen 0,0334 - 0,0697 mg/ L, phosphate 0 - 0,0219 mg/ L. It was concluded that water quality around Paleloan Village was appropriate for aquaculture activity. Keywords: water quality, aquaculture, Paleloan Village

Physico-Chemical Parameters Influencing Faecal Bacterial Survival in Waste Stabilization Ponds

1987 ◽  
Vol 19 (12) ◽  
pp. 145-152 ◽  
Author(s):  
H. W. Pearson ◽  
D. D. Mara ◽  
S. W. Mills ◽  
D. J. Smallman
Keyword(s):  
Dissolved Oxygen ◽  
Elevated Temperatures ◽  
Ph Effect ◽  
Faecal Coliform ◽  
Bacterial Survival ◽  
Waste Stabilization Ponds ◽  
Stabilization Ponds ◽  
Waste Stabilization ◽  
Physico Chemical

In situ studies on waste stabilization ponds (in Portugal) showed that faecal coliform numbers were lowest at positions in the water column where pH, temperature, dissolved oxygen and algae were high. Numbers were not always lowest at the surface where light intensities were highest or in ponds where light penetration had increased through algal grazing by Daphnia. Laboratory studies showed that pH values approaching 9.0 or above increased faecal coliform die-off particularly under nutrient-poor conditions. Elevated temperatures enhanced the pH effect but the level of dissolved oxygen made little difference. Streptococcus, Salmonella and Campylobacter isolates all behaved similarly to the faecal coliforms. Daphnia grazing of the algal population in maturation ponds may reduce the microbial quality of the final effluent. These findings are discussed in relation to pond design.

scholarly journals SEA WATER QUALITY OBSERVED FROM NUTRIENT ASPECT, DISSOLVED OXYGEN AND PH IN THE BANGGAI WATERS, CENTRAL SULAWESI

2012 ◽  
Vol 4 (2) ◽  
Author(s):  
Marojahan Simanjuntak
Keyword(s):  
Water Quality ◽  
Dissolved Oxygen ◽  
Sea Water ◽  
Bottom Layer ◽  
Nutrient Concentrations ◽  
Phosphate Nitrate ◽  
Winkler Method ◽  
June July ◽  
Central Sulawesi ◽  
Oxygen Concentrations

<p>Banggai Waters, Central Sulawesi is very important because the waters is very rich in marine resources and its oceanographic  conditions are affected by land and Banda Sea. This research was conducted in June-July 2011 using a research vessel Baruna Jaya VIII. The research objective was to determine water quality based on as an indicator of fertility waters and factors influencing the water quality.  The parameters studied were phosphate, nitrate, silicate, dissolved oxygen, and acidity (pH). Water samples were collected using Niskin Bottle attached with CTD form three different depths i.e., surface (0-1 m), middle (20-100 m), and near bottom layer (100-200 m) at 14 stations.  Concentrations of phosphate, nitrate, and silicate were analyzed according to the method of Strickland and Parsons. Dissolved oxygen concentrations were measured by Winkler method. The degree of acidity (pH) was measured with pH meter Cyber ​​Scan 300. The results indicated that nutrient concentrations were generally higher in eastern and southern waters. Phosphate concentrations ranged from 0,04–1.70 µg A/l; nitrate 0.28–27.23 µg A/l, and silicate 1.96–46.56 µg A/l. Dissolved oxygen concentrations ranged from 2.14–4.15 ml/l, and pH values ​​from 7.95–8.26. In reference to the quality standards set by the Ministry of Environment (KMNLH), the Banggai Waters, Central Sulawesi is still in good conditions for the life of various biota..</p> <p>Keywords: water quality, fertility waters, nutrients, Banggai Waters</p>

scholarly journals GUNUNGAPI DAN KEGIATAN HIDROTERMAL BAWAHLAUT DI PERAIRAN SULAWESI UTARA: MINERALISASI DAN IMPLIKASI TEKTONIK

2016 ◽  
Vol 6 (2) ◽  
Author(s):  
Haryadi Permana ◽  
Pirlo M.
Keyword(s):  
Sea Water ◽  
Light Transmission ◽  
Manganese Content ◽  
Hydrothermal Activity ◽  
Submarine Volcano ◽  
Methane Gas ◽  
North Sulawesi ◽  
Hydrothermal Activities ◽  
Weak Anomaly ◽  
Submarine Hydrothermal Activity

Ekspedisi kelautan IASSHA (Indonesia Australia Survey for Submarine Hydrothermal Activity) 2003 di kawasan perairan kepulauan Sangihe, Sulawesi utara telah mengidentifikasi Kawio Barat sebagai gunungapi bawahlaut dan indikasi kegiatan hidrotermal bawahlaut antara lain di Roa, Naung dan Banua Wuhu. Kegiatan gunungapi Kawio Barat dicirikan oleh anomali transmisi cahaya akibat adanya influk fluida (plume) pada airlaut dan tingginya kandungan gas metan dalam airlaut yang berhubungan dengan tingginya kandungan mangan. Kamera bawahlaut merekam koloni dari polychaete (“tube worms”) yang tumbuh pada batuan dimana gas metan muncul. Gejala mineralisasi pada batuan dicirikan adanya diseminasi pirit dan markasit pada batuan. Indikasi hidrotermal gunung Roa dicirikan adanya tingginya kandungan gas metan dalam airlaut sekitar puncak bukit sedangkan gejala aktivitas hidrotermal gunungapi Naung teridentifikasi berdasarkan tingginya kandungan gas metan dalam airlaut. Batuan penutup perbukitan Naung berupa andesit, batuapung dan breksi andesit. Perbukitan bawahlaut Banua Wuhu kemungkinan sebagai kawah parasit bawahlaut, terletak dilereng barat pulau gunung tidak aktif Mahengetang. Aktivitasnya ditunjukan oleh anomali lemah kekeruhan airlaut. Mineral ubahan berupa lempung, karbonat, klorit dan opak. Batuan terubah mengandung mineral halus pirit dan noda-noda kalkopirit. Kata Kunci: Gunungapi bawahlaut; hidrotermal, transmisi cahaya, influk fluida, gas metan, mangan, koloni dari polychaete, diseminasi pirit dan markasit, kawah parasit. The 2003 IASSHA (Indonesia Australia Survey for Submarine Hydrothermal Activity) expedition at Sangihe islands waters, North Sulawesi has identified the submarine volcano of Kawio Barat and also observed hydrothermal activities at Roa, Naung and Banua Wuhu. The activity of Kawio Barat volcano is characterized by light transmission anomaly with correlated to fluids influx (plume) and higher methane gas in sea waters correlates to higher manganese content. A submarine camera grab recorded a polychaete (“tube worms”) colony that growth on the rock where a methane gas seep. The pyrite disemination and marcasite indicates rocks mineralization. The Roa and Naung hydrothermal activities indicated by higher content of methane gas in sea water. The Naung volcano is covered by andesite, pumice and andesite breccia. The Banua Wuhu hill is possibly as a parasitic cone of active Mahengetang volcano. The weak anomaly transmissometer of sea water indicates a hydrothermal activity. The alteration mineral are clay, carbonate, chlorite and opaq mineral with fine mineral of pyrite and chalcopyrite. Keywords: Submarine volcano, hydrothermal, light transmission, fluids influx, methane gas, manganese, polychaete colony, pyrite dissemination and marcasite, parasitic cone.

scholarly journals Qualité physico-chimique des eaux littorales de la partie Sud-Ouest du Lac Albert, RD Congo

2020 ◽  
Vol 14 (5) ◽  
pp. 1831-1842
Author(s):  
Kasigwa Dieudonné Ciwanine ◽  
Lonze Joël Katho ◽  
Busanga Alodor Kankonda ◽  
Jean-Claude Micha
Keyword(s):  
Dissolved Oxygen ◽  
Coastal Waters ◽  
Circadian Variation ◽  
The South ◽  
Temperature Conductivity ◽  
Physico Chemical ◽  
Sont Respectivement ◽  
Conductivité Électrique ◽  
Higher Temperature

Le lac Albert est moins étudié en ce qui concerne l’évolution de la qualité de ses eaux. L’objectif de cette étude était de contribuer à la connaissance de quelques paramètres physico-chimiques des eaux littorales de la partie Sud-Ouest du lac Albert. Pour y parvenir, nous avons utilisé un kit multi-parameter AZ8603 pour le prélèvement, in situ, du pH, de l’oxygène dissous, de la conductivité électrique et de la température pendant un cycle de 24 heures à intervalle de 3 heures durant une année. Il ressort de cette étude que les moyennes de température, conductivité, oxygène dissous et pH sont respectivement de 29,07 °C, 631,65 μs/cm, 4,8 mg/l et 8,01. La concentration en oxygène dissous était plus élevée le jour que la nuit. La différence non significative de température entre le cycle diurne et nocturne montre que l’activité photosynthétique est l’élément explicatif de l’augmentation du taux d’oxygène dissous. Les mois d’avril et de mai se sont distingués par une forte température et une baisse de la concentration en oxygène dissous. Ceux de mars, août, octobre et novembre ont été marqués par une conductivité élevée corrélée positivement à la température.Mots clés : Eaux, lac Albert, physico-chimie, variation nycthémérale.   English Title: Physico-chemical of coastal waters of the South-Western part of Albert Lake, DR CongoThe Albert Lake is barely investigated with regard to the evolution of the quality of its waters. The objective of this study was to contribute to the knowledge of some physico-chemical parameters of the coastal waters of the South-Western part of the Albert Lake. To reach the above objective, a kit multi AZ8603 parameter was used to record, in situ, the pH, the dissolved oxygen, the electric conductivity and the temperature during a cycle of 24 hours, with 3 hours interval. This was done during a year. This survey evidenced that the averages of temperature, conductivity, dissolved oxygen and pH were respectively 29.07 °C, 631.65 μs/cm, 4.8 mg/l and 8.01. The concentration of dissolved oxygen was higher during the day as compared to its concentration in the night. The slight difference of temperature between the diurnal and nocturnal cycle showed that the photosynthesis activity was responsible of the increase of the dissolved oxygen rate. The months of April and May were characterized by relatively higher temperature and a lower concentration of dissolved oxygen. Those of March, August, October and November showed higher conductivity correlating positively to the temperature.Keywords: Waters, Albert Lake, physico-chemistry, circadian variation.

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