Open Access Research Article

Study on Hydrographical Properties in the Surface Coastal Waters along the Gulf of Aden and Arabian Sea, Yemen

Ibrahim A. Al-Akhaly1, Nabil A. Al-Shwafi1 and Mohummed A. Al-Safany*2

1Faculty of Petroleum and Natural Resources, Sana‟a University, Yemen

2Faculty of Marine Science, King Abdulaziz University, Saudi Arabia

Corresponding Author

Received Date: June 12, 2020;  Published Date: July 14, 2020

Abstract

The study of hydrographic properties of coastal environments is important, because the variations in the instantly influence on the floral and faunal production. Spatial distributions of hydrographic properties in the surface layer of the coastal waters along the Gulf of Aden and Arabian Sea, Yemen in August 2014 and January 2015 are presented in this study. Water samples were collected from 12 stations located between As suqayyah in the west and Hawf in the east. The hydrographical properties; air and water temperature, salinity, dissolved oxygen (DO), pH and total alkalinity of the coastal water of the Gulf of Aden and Arabian Sea of Yemen, were determined. In August 2014, the air temperature ranged between 22.00 and 26.30 oC with mean value of 23.80±1.58 oC. Water temperature ranged from 23.70 to 28.10 oC with mean value of 26.03±1.56 oC. The pH values ranged between 7.88 and 8.02 at different stations. The salinity showed not much variation among the sampling stations. DO values ranged between 4.10 and 4.65 mg/l with mean value of 4.42±0.19 mg/l. The total alkalinity values ranged from 2.270 to 2.325 meq/l with mean value of 2.307±0.020 meq/l, while the air temperature ranged between 23.00 and 26.30 oC with mean value of 24.44±1.25 oC. Water temperature ranged from 25.20 oC to 28.70 oC with mean value of 26.65±1.11 oC. The pH values ranged between 7.89 and 8.03 at different stations. The salinity showed not much variation among the sampling stations. DO values ranged between 4.78 and 5.50 mg/l with mean value of 5.05±0.25 mg/l. The total alkalinity ranged from 2.234 to 2.359 meq/l with mean value of 2.301± 0.031meq/l in January 2015. The results obtained reflect the effect of the warm tropical zone of the Gulf of Aden and Arabian Sea of Yemen, irregular topography, local hydrographic condition and result of upwelling current. Statistical analysis like Pearson correlation matrix was performed to the data set to know the relationship among the studied properties. The quantitative analysis of hydrographical variability of the study region provides a baseline for assessing future changes.

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