بعض الخصائص الكيمياوية والفيزياوية والاملاح المغذية في مياه ساحل المخا/ اليمن ومقارنتها بالخليج العربي

Abstract

A study has been conducted for the physico-chemical parameters which are the temperature, salinity, dissolved oxygen and pH in addition to principal nutrients : ammonia, nitrite, nitrate, phosphate and silicate in water samples from six stations along Mocha cost in Yemen, which are exposed to heavy pollution by untreatred waste water and different industrial wastes. Results revealed that temperature was nearly equal in all stations during summer and winter but little high at summer by two degrees compared to winter, salinity was found in high rate in the control station during both summer and winter seasons and lower salinity in station 4, water was poor in oxygen in which higher concentration was recorded in control station and lower concentration was recorded in station 1 during summer and winter, pH values were close to each other in all stations. For nutrients, higher concentration of ammonia was recorded in station 2 and lower concentration was recorded in control station during both seasons, high concentration recorded for nitrite in station 1 and lower concentration in control station in both seasons, nitrate concentration was higher in station 4 and lower in control station for both summer and winter seasons, higher phosphate concentration was recorded in station 2 and lower concentration recorded in control station, high silicate concentration was recorded in station 2 and lower concentration was recorded in control station. Results declared that those water characterized as being areas for eutrophication and poor in dissolved oxygen due to it's consumption by bacteria for oxidation of nitrogen compounds and different organic matter which exist in higher concentrations in these waters due to release of waste water directly to the sea without treatment leading to great harmful for the environment among which is damage of coral reef spreading in the area.