Environmental Impact Study Of Artisanal Mining Of Opal In Delanta Woreda

The study area is found in northern Ethiopia in Amhara region in south Wollo zone Delantarnworeda. The area is covered by various kinds of volcanic rocks and the places of the study arearninclude mining sites: Echage, Tache Amba, Minychil and Gengena. The main objective of thernresearch is to assess the environmental and socio-economic impact of unorganized/informal opalrnmining on the local environment. Moreover, the research aims to generate baselinernenvironmental data for the future comparison of environmental changes which will representrnfrom the mining activities. To achieve the research objectives, samples of waste rocks, soil andrnwater were collected from the mining places for heavy metal analysis by using flame AAS testrnmethod and water quality, pH and electrical conductivity (EC) were measured on the site. Thernsurvey as well as questionnaires and interviews were conducted. The data were treated with thernhelp of statistical techniques of SPSS v15 and Excel. With the help of geographic informationrnsystems (GIS) technique, digital elevation model (DEM) and satellite image the land use /landrncover maps of the woreda were indicated. Furthermore the soil loss of the study area wasrnestimated using empirical model of USLE model. The following analytical results (ppm) arernobtained from waste rock samples. copper(4-8), zinc( 99-140),cobalt(10-17),nickel(2-8),andrnlead(

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