Abstract

Data were collected from five sites at Hadhramout, Yemen ,on seasonal basis from August 2013- May 2014; where the physical and chemical properties of seawater were measured. It was found that the physical and chemical properties of seawater have significant seasonal variations within the coast with values ranging from 7.9-8.8, 24.3 ºC -31.4 ºC, 51.7- 52.8 ms/cm, 5.2 mg/l - 6.8 mg/l for water pH, temperature, electrical conductivity and dissolved oxygen, respectively. The higher concentration of PH and temperature during May was found at station 11, while Concentration of dissolved oxygen (DO) was relatively high during August at station10,12 and 14, and, salinity were at their minimum level during this period at station 4, 8 and 15. The results obtained reflect the effect of the warm tropical zone of the Gulf of Aden and the Arabian Sea, irregular topography, local hydrographic condition and the result of upwelling current.