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The composition of sediments and other materials occurring in streams, geochemical processes within the drainage basin, and various land uses are among the main factors influencing stream water composition. Stream sediment and wildfire ash samples were gathered from the area studied. The applied methodology consists of aqua regia and Diethylene-Triamine-Penta-Acetic acid (DTPA) chemical extraction; Cation Exchange Capacity (CEC), pH, and soil organic matter (OM) determination; a Geographic Information System (GIS) database; factor analysis; and determination of the contamination factor (CF) for the assessment of contamination degree. This study aimed to evaluate the elements’ content in stream sediments of Kineta and Nea Peramos areas (West Attica, Greece) and investigate any relationship between elements (aqua regia and DTPA extracted) in stream sediment and ash in wildfire and flood-impacted areas. The stream sediments’ properties, the bioavailable forms of copper (Cu), iron (Fe), manganese (Mn) and zinc (Zn), and the total content of other potentially toxic elements in wildfire ash samples, are discussed. This research estimated moderate contamination for FeDTPA, MnDTPA and ZnDTPA in stream sediments of the study area. Contamination for CuDTPA and moderate contamination for ZnDTPA in the stream sediments of the Nea Peramos area was recorded. Factor analysis results suggested that the contents of FeDTPA, MnDTPA, CuDTPA and ZnDTPA in the study area’s stream sediments may affect the chemistry of stream water.

Elements’ Content in Stream Sediment and Wildfire Ash of Suburban Areas in West Attica (Greece)