tubewell

Single-cylinder water-cooled diesel motor driving a pump and extracting from a tubewell in a fadama or in alluvial plains.

Water profile of Nigeria 2008

The tubewell system requires the existence of a sub-surface horizon, virtually an aquifer, of sufficient transmissivity to permit extraction of water at reasonable cost.

Chapter 9 1995

The key to tubewell performance is the design of the screen and filter system in relation to the character of the surrounding aquifer.

Chapter 17 1995

However, in support of the cultivator view, it must be admitted that the government seldom attempts to recover any of the capital cost of providing canal irrigation, which is usually considerably greater per hectare served than the capital cost of tubewell irrigation.

Chapter 17 1995

A key item in the latter category is control of the tubewell pump.

Chapter 17 1995

In tubewell systems, direct or indirect volumetric charging for water is commonly practiced.

Chapter 10 1995

The idea of working in the extremely arduous conditions of the hot weather months, because supply from a tubewell would make a profitable crop in that season possible, may not be appealing.

Chapter 5 1995

However, in an area where soil salinity is already depressing crop yields, cultivators are unlikely to take up tubewell installation on a significant scale.

Chapter 9 1995

Saleable items include anything of copper, aluminum or brass including transmission lines or motor windings in tubewell areas, and brass hardware on gate structures.

Chapter 5 1995

Where groundwater salinity has not yet risen to unacceptable levels watertable elevation may be controlled and natural leaching promoted by tubewell irrigation, including cultivator-owned shallow tubewells.

Chapter 9 1995