Remote Sensing as a Tool in Assessing Water Quality

Remote sensing techniques can be used to detect the water quality against different dates. The aim of this study is to determine the relation between the water quality of AL-Abshiet drain and its reflectance using satellite images. Four different dates of SPOT satellite images and an image of World View satellite are used to measure the reflectance of the water through the selected 6 points along Al-Abshiet drain. The results of monitoring the water reflectance of 6 points along Al-Abshiet drain (as polluted water) and one point taken from Nile River (Damietta Branch as clear water) show that there is a high effect of the growth of aquatic plants and suspense-materials in the year 2011 in the all year and there is high difference with the clear water sample (Damietta Branch). There are high differences in the water reflectance which is mainly due to the growth of aquatic plants as well as the suspended water in Al-Abshiet drain. The results of the chemical analyses of Al-Abshiet drian water show that the Nitriate-Nitrogen values in sites 5 and 6 ranged from 18.03 mg/l to 18.68 mg/l were higher than the maxiumum limit value (15 mg/l). The ammonia-N value in sites 5 and 6 ranged from 5.10 mg/l to 5.52 mg/l) was less than the maxiumum limit value (5 mg/l). The ECw of Al-Abshiat drain in all sites (ranged from 2.6 dS/m to 3.2 dS/m) were higher than the maximum limit value (2 dS/m). The Boron element was very high increase in Al-Abshiet drain in all 6 sites (ranged from 5.16 mg/l up to 32.99 mg/l) than the maxiumum limit (0.75 mg/l). Therefore, the water quality of Al-Abshiet drian is not recomended to be used it for irrigation (Accoding to Ayers and Westcst, 1994). [Ismail, M. Remote Sensing as a Tool in Assessing Water Quality. Life Sci J 2012;9(3):246-252]. (ISSN: 1097-8135). http://www.lifesciencesite.com. 36