The most common source of drinking water for the rural people is groundwater from boreholes (deep wells), shallow wells and springs (Dzwairo et al. 2006).
In addition, limited numbers of VSP measurements at deep boreholes (deeper than 1 km) have revealed very accurate in situ seismic velocity structures (Yamamizu1996,2004).
Thermal conductivity can be determined in the laboratory or in situ, as in a borehole or deep well, by turning on a heating element and measuring the rise in temperature with time.
Four district water engineers assessed boreholes and deep wells while 22 MoHCC environmental health technicians (EHTs) assessed all other water points.
1990: EGS Soultz - drilling of a second 2,000-m 2,000-mrehole andeepepening of the first borehole to 3,500 m depth (and160°C); geothermal reservoir ideepeningtiof; the second borehole was used as seismic observation borehole.
The boreholes with deeper depths recorded very high values as compared to the hand dug wells which have shallow depths.
In this bone-dry region, cholera and diarrhoea are major causes of death among children; because of the tsunami, new boreholes and deeper, safer wells are now being dug in the mountains.
There are two deep borehole stations, TOS and HYS, in addition to borehole station STG200 that are equipped with the stress meter.
Groundwater development through deep borehole drilling is recommended to a minimum depth of 220 m; the borehole depth should not exceed 250 m.
