Water use
planning-Dug Wells
Watershed enjoins the
biophysical, social and economic inputs, which if optimally managed, lead to diversified
high agricultural production, control of environmental degradation and provide a mechanism
for the recharge of groundwater aquifers. Watershed improve water availability for crop
and plants, augmentation of groundwater recharge like improvement in water table, water
yield, numbers of well etc.,
Watershed thus ensure
water adequacy to crops and reduce the risks of yield loss due to water related stresses.
The main aim is to manage the land and water resources for sustained production. To avoid
water scarcity construction of water harvesting structures in watershed area is very
important. If it is constructed in the lower portion at a suitable or appropriate location
which will stored large quantity of water to re-charge the ground water which in turn
helped to get more water in the existing wells. Due to water harvesting structures the
groundwater table will increased and there will not be problem of scarcity. This water can
be used as protective irrigation to the crops and other domestic uses. In watershed area
dug wells also constructed while considering water storages for long term.
Dug wells or open
wells are dug down to the water bearing strata. The open excavation is usually circular in
shape, the diameter varying from 1.5 to 4.5m. The wells generally derive their water from
unconfined aquifers. They may be lined or unlined. They can yield relatively large
quantities of water from shallow sources. Their large diameters permit the storage of
large quantities of water. Dug wells must be deep about 4 to 10 m below the water table in
dry weather. Large dug wells can be constructed rapidly with portable excavating equipment
such as clam-shell and orange-peel buckets. |
Ag.
Technologies
(Agricultural
Engineering)
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