For
the construction of building and roads and create the sand blocks in west bengal,
sand is being extracted from the rivers in West Bengal. For the
construction industry, the companies are dredging the rivers in order
to get impure free and good quality sands. There are some of the
methods of extraction of sand. These are off-channel mining and
in-stream mining.
In-stream
Mining
In
order to lower the cost of transportation of the sand, the in-stream
sand mining is often done in locations which are along the route of
the transportation or close to the end markets. This type of mining
is extremely damaging to the aquatic ecosystem and properties. While
the flow of sediment can get hamper by the over dredging of the
streams, the channels can change its course. Hence, within the
sustainable limits, one can do the mining activities without harming
nature. There are few recommendations which are as follows -
-
Setting an elevation below which the mining is not allowed
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On the basis of annual replacement levels, one should not permit a mining scale.
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There should be a long term monitoring mechanism.
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Limiting extraction methods to bar skimming
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Between May And September, one needs to limit the mining activities
Off
Channel Mining
In
changing the alluvial system, floodplain extraction or off- channel
mining of river sand is done. As the meandering rivers flow across
the flood plains, under this system it forms a possibility that the
river channel would move towards the pit. This is a situation in
which the river flows through the area left between the pit and river
and is known as river capture. There are some recommendations, which
can lessen the harm caused by off-channel mining.
-
The the walk of the channel, one should keep the maximum depth of the pit.
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Away from the main channel, the off-channel extraction should be done.
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One needs to set up a long run monitoring mechanism.
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In order to provide the brought back to support the wetland habitat, pits should be redeemed for agriculture.
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In the long term, one should establish proper responsibility and accountability.
Mining
Process Of Dolomite
There
is a various process of dolomite mining, which is being practiced in
the dolomite minesin arunachal pradesh.They
are the removal of soil and vegetation layer, cruising and blasting
of dolomite and transportation.
Conclusion:
The sand and dolomite mining is one of the most profitable types of
mining. To know more one can go the “Abhinna Group“ and check
details.