SPATIAL VARIATION OF THE OPTICAL AND QUALITY PROPERTIES OF THE TIGRIS RIVER IN AL-SHURQAT CITY/ SLAHALDEEN/ IRAQ, USING GEOMATIC TECHNIQUESAYAD A. AL-DULIAMI, EHAB M. AMEN AND ESSA M. THALLAJ
The study aimed at spatial variation in the Optical and qualitative properties of the Tigris River in Al-Sharqat City using geomatic techniques. The path of the study area was determined and water samples were brought to study the chemical and physical tests (Ca, Mg, Na, K, CL, SO4, HCO3 and trace elements Cd, Zn, Cu, and Pb, and tests pH, EC, NTU). WQI, SAR, Na% TSS, and TDS, were calculated, then the results compared with standard criteria dependents by, WHO 2017, IQS 2009 for human drinking and Ayres and Westcot classification to irrigation water for agricultural use. A satellite image at date 7-1-2019 was acquired and it's digitally processed by converting the radiation values to spectral reflectivity and calculated using the ERDAS 15 program and establishment a database and preparing spatial distribution maps of properties and criteria using ArcGIS 10.2. The relationship of Correlation (r) and Regression (R2), was found between the specific properties of water and the spectral reflectivity using the SAS program. The results found that there was no danger of concentration of dissolved ions for the drinking water and irrigation, while there was a risk of concentration of cadmium, zinc, and lead. The Correlation r and R2 coefficient using SAS program between the properties and parameters of the water quality with the spectral reflectivity at the visible wavelengths were positive and very weak at the invisible spectral bands and the best spectral ratio at the band4 / band2.