Webbläsaren som du använder stöds inte av denna webbplats. Alla versioner av Internet Explorer stöds inte längre, av oss eller Microsoft (läs mer här: * https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Var god och använd en modern webbläsare för att ta del av denna webbplats, som t.ex. nyaste versioner av Edge, Chrome, Firefox eller Safari osv.

Geophysical Investigations of a Rural Water Point Installation Program in Nampula Province, Mozambique

In English

Författare

Summary, in English

There are many projects in Mozambique for poverty reduction. One of these projects is funded by Millennium Challenge Account (MCA) and is aimed to install a total of 600 rural water points in the provinces of Nampula and Cabo Delgado. Each water point consists of a drilled well, a water pump and a communal washing basin.



Vertical Electrical Sounding (VES) was used for assessing the uitability of the drill sites but despite this many boreholes have come out with an insufficient yield and the failure rates in certain areas are as high as 50 %. Continuous Vertical Electrical Sounding (CVES), also known as Electrical Resistivity Tomography (ERT), was carried out in an attempt to explain the high failure rate. In total 11 sites were investigated, including seven boreholes with sufficient yield and five boreholes with insufficient yield. A perpendicular cross with two 400m survey lines were made over 7 boreholes and single 400m survey lines were made over 5 boreholes.



Due to lateral variation the geology in study area is best described in 3D therefore ERT appears to be a suitable method for groundwater exploration and could probably lower the failure rate.

Avdelning/ar

Publiceringsår

2013

Språk

Engelska

Dokumenttyp

Konferensbidrag

Ämne

  • Geotechnical Engineering

Conference name

Near Surface Geoscience 2013

Conference date

2013-09-09 - 2013-09-11

Conference place

Bochum, Germany

Status

Published

Projekt

  • Groundwater Resources Mapping in Mozambique