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A well is an excavation or structure created in the ground by digging, driving, or drilling to access liquid resources, usually water. The oldest and most common kind of well is a water well, to access groundwater in underground aquifers. The well water is drawn up by a pump, or using containers, such as buckets, that are raised mechanically or by hand. Water can also be injected back into the aquifer through the well. Wells were first constructed at least eight thousand years ago and historically vary in construction from a simple scoop in the sediment of a dry watercourse to the qanats of Iran, and the stepwells and sakiehs of India. Placing a lining in the well shaft helps create stability, and linings of wood or wickerwork date back at least as far as the Iron Age. Wells have traditionally been sunk by hand digging, as is the case in rural areas of the developing world. These wells are inexpensive and low-tech as they use mostly manual labour, and the structure can be lined with brick or stone as the excavation proceeds. A more modern method called caissoning uses pre-cast reinforced concrete well rings that are lowered into the hole. Driven wells can be created in unconsolidated material with a well hole structure, which consists of a hardened drive point and a screen of perforated pipe, after which a pump is installed to collect the water.

This GIF Bitmap Image Wolf Free Download Image is a part of Wolves Category in Animals Folder. Wolf Free Download Image has a Resolution of 162x85 Pixels. Wolf Free Download Image is of .gif (Graphics Interchange Format) Format. It's Size is 8.6KB. This GIF has been Downloaded 49 times till now. Wolf Free Download Image was Added on 16-07-2021. Download Wolf Free Download Image by clicking the button below:

Image Name: Wolf Free Download Image
Image Category: Animals / Wolves
Date Added: 16-07-2021
Resolution: 162x85

Format: GIF
Downloads: 49
Views: 96
Size: 8.6KB

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