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For many years, the world's longest borehole was the Kola Superdeep Borehole in Russia. From 2011 until August 2012 the record was held by the 12,345-metre (40,502 ft) long Sakhalin-I Odoptu OP-11 Well, offshore the Russian island Sakhalin. [11] The Chayvo Z-44 extended-reach well took the title of the world's longest borehole on 27 August 2012 ...
The drill scene in the village. Groundwater in Nigeria is widely used for domestic, agricultural, and industrial supplies. The Joint Monitoring Programme for Water Supply and Sanitation estimate that in 2018 60% of the total population were dependent on groundwater point sources for their main drinking water source: 73% in rural areas and 45% in urban areas. [1]
Zaï or tassa is a farming technique of digging pits in less permeable soil to catch water and concentrate compost. [1] The pits are between 15 and 50 centimetres (0.5 and 2 ft) across and around 5 to 15 centimetres (2 to 6 in) deep, spaced approximately 80 centimetres (3 ft) apart. [ 1 ]
Boring is drilling a hole, tunnel, or well in the Earth. It is used for various applications in geology, agriculture, hydrology, civil engineering, and mineral exploration. Today, most Earth drilling serves one of the following purposes: return samples of the soil and/or rock through which the drill passes; access rocks from which material can ...
Geological map of the Cape Peninsula and False Bay Geological section of the Cape Peninsula and False Bay. Cape Town lies at the south-western corner of the continent of Africa. It is bounded to the south and west by the Atlantic Ocean, and to the north and east by various other municipalities in the Western Cape province of South Africa.
Declining soil quality is a food security concern across Africa. In Zimbabwe, once a regional breadbasket, about 70% of soils are acidic, according to the government.
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A borehole shall be advanced incrementally to permit intermittent or continuous sampling. Intervals are typically 1.5 m (5 ft) or less in homogeneous strata. Tests and sampling should be done at every change in strata. After the borehole has been advanced to a desired depth and excess cuttings have been removed, testing and sampling can be ...