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Optional Report: Effects of artinasal gold mining

by Okoth Okoth | 30-03-2021 15:24


Threats to Biodiversity 
According to Shoko (2001) the following are environmental problems and their possible causes as a result of artisanal small scale mining and or gold panning in the Amazon basin. The set of problems caused by the clearing of land include soil erosion, siltation, and soil compaction, destruction of ecosystems and loss of biodiversity. Water pollution causes the destruction of aquatic ecosystems, plant life and depletion of fresh water resources. The third set of problems 
are those caused by air pollution and they are ozone depletion which protects short-wave radiation from the sun and global warming in which greenhouse gases trap long wave radiation thereby increasing the temperature on the earth¡®s surface. Noise pollution from stamp mills, pan dishes and blasting also causes ill health, loss of hearing and migration of wild life and birds. 
Land degradation as well result in the loss of the landscape aesthetic value as mining activities leaves open pits and mounds of sand. 

Vegetation Destruction 
Dreschler (2001) argues that when the miners discover a lucrative area, they construct makeshift homes out of pole and dagga using local trees. Artisanal small scale gold miners are responsible for the clearing of extensive areas for fuel and infrastructural development in areas where those mines are located. This is as a result of the nomadic nature of artisanal small scale gold mining. The interesting point to note is that 100% of the miners‟ fuel needs come from wood. These rapid overnight settlements as observed by Shoko (2005) in newly discovered gold and gemstone 
areas does not only result in rampant deforestation, but also social ills associated with urbanization which include alcohol abuse, prostitution, land use conflicts with local communities as well as water pollution, child labour and diseases. He goes on to say that the excess reliance 
on wood as a source of energy results in the reduction of biodiversity and increasing rates of 0deforestation. Chiwawa (1993:25) estimates that for instance about four million tonnes of wood is used in Zimbabwe every year as fuel which translates to massive deforestation. 

Land Degradation and Siltation
UNEP, (1999) refer to land degradation as a composite term defined as sustained loss in the 
quality and the productive capacity of the land. UNCED in the FAO discussion paper (2004) refers to desertification and land degradation as one. Land degradation threatens the economic and physical survival (UNEP, 1999) and leads to household and national food insecurity in many countries. A common indicator of land degradation is chiefly soil erosion among the reduction in vegetation cover and changes in vegetation composition. Artisanal Small scale miners occupy 
and utilize about 0.005% of total land in use (Dreschler, 2001), but they move a huge volume of about ten million tonnes of rock material per year. These figures show that the risk accumulation process as a result, is massive. Shoko (2005) argues that the environmental impacts of individual 
operations are not necessarily significant; the accumulated impacts of numerous artisanal small scale mining operations can create serious problems for ecosystems and local communities. Dreschler (2001) argues that 80% of the operations are open casts or shallow pits less than 30m deep and there are left uncovered and unprotected. This kind of land disturbance resulting from 
gold panning activities leave a noticeable effect on the siltation of rivers and dams, deterioration of water quality, reduction of grazing land for animals and the overall reduction in biodiversity.