Abstract
Water and sediment samples were collected from 18 sampling stations in Wadi Gaza for two successive years in order to: (1) Establish a baseline condition of the geochemistry of surface water and sediments; (2) assess the impact of seasonal variation on distribution of heavy metals and major ions; and (3) identify possible natural and anthropogenic sources of pollution. The heavy metal concentrations in the sediments of the lake (downstream) were higher than those of the eastern eight stations(upstream) where the water was shallower. Shallower areas showed greater temporal variation than deeper areas. Several elements (P, Fe, Mn and As) showed the greatest temporal variability. For example, in the winter rainy season these elements decreased 2–10 times compared to their values in summer. Moreover, Ca, Na, Cl, PO4, and NO3 decreased3, 3, 5, 2, 4 times, respectively. Some of the trace metals were more abundant in these waters compared to the domestic wastewaters of the study area. The averages of Cd and Co were 6 and 43 μg/l, respectively and they were 50 times higher than the domestic wastewater results. The discharge of olive oil mill wastewater was recorded in the Ca, Na, Mg, K and P concentrations in sediments of one of the sampling stations.
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Shomar, B.H., Müller, G. & Yahya, A. Seasonal Variations of Chemical Composition of Water and Bottom Sediments in the Wetland of Wadi Gaza, Gaza Strip. Wetlands Ecol Manage 13, 419–431 (2005). https://doi.org/10.1007/s11273-004-0412-3
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DOI: https://doi.org/10.1007/s11273-004-0412-3