PHYSIO-CHEMICAL PROPERTIES OF TIDAL FLATS SEDIMENTS IN IRAQI COASTLINE, NORTHWEST OF ARABIAN GULF
The quantitative and qualitative physic-chemical properties considered in more than 15 geographical sites were selected along the Iraqi coastline. The grain size analysis and the EC, pH, TDS, K, Na, Mg, Ca, HCO3, Cl, SO4 were estimated in the sediments sample. Three types of soil textures dominate which are sandy clay, sandy clay loam and clay loam were observed in the present study. The results show that the pH value ranges from7.67-8.19, EC (23-68.45 dS/m), TDS (14720-43808 ppm), Na (6388-20746 ppm), K (73.225-211.875ppm), Ca (306.25-537.5 ppm), Mg (675-2475ppm), Cl (6160-18350 ppm), SO4 (1680-4080 ppm), HCO3 (93.75-225 ppm), SAR (37.61-107.95). The analytical results for the surface samples presented the impact of both solodization and salinization processes. They are shown from the high values of EC and domination of Na in the exchangeable complex. The ions occur in the following concentration order: Na > Mg > Ca > K and Cl > SO4 > HCO3.