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RAHMARIA ANTI
EROSION MEASURES DRDA
AND DISTRICT ADMINISTRATION
The
combined flow of Lohit and Dibang Rivers called Brahmaputra was flowing along
the northern side of Saikhowa Reserve forest. Since the year 1992, a part of
this combined flow, followed a course along the southern side of Saikhowa
Reserve forest, with increasing magnitude in successive years and joined the
existing river channels of Dhola, Dangri and Dibru in the downstreram. The
offtaking flow is called Anantanalla offtake, or only Anantanalla. With passage
of time, Anantanalla went on increasing in magnitude. The problem of bypassing
of discharge through Anantnalla, became very acute during 1997. By that time,
the entire flow of Lohit river and the major part of Dibang river was observed
flowing through Anantnalla. The high floods of 1997, caused wide spread floods
devastation in Tinsukia and Dibrugarh districts, affecting 49 villages, due to
submergence. The combined flow of Anantnalla continued and met river Brahmaputra,
through Dibru river outfall and caused intense erosion at Rohmoria upstream of
Dibrugarh.
Acute erosion was observed in the year 1997 in about
a 9 Km stretch on the southern bank of the Brahmaputra covering Bali Jan tea
Estate in the upstream upto Oakland Tea Estate affecting lives property and
fertile land
Litting
and Gorapara
village. Tea Estates Educational Institutions, Oil and displacement of
population,
Govt. Sericulture Farm, a major part of
Dibrugarh-Rangagora-Tinsukia
Road.
The
erosion was caused mainly due to the combined flow of the river Lohit and Dibang.
And joined the existing river channels river channels of Dhola ,Dangri and Dibru
in the downstream. The off taking flow is called the Anantalla and with the join
of Anantanalla with
Brahmaputra
increased the intensity
of Erosion at Rohmaria.
The Objectives were to: Check further erosion measures, expand oil exploration
provides infrastructure facilities provide employment and uplift the economic
status.
Anti-Erosion
Measures
Close the
Outflow of Anantnalla and direct the same to
Brahmaputra
.
Pipe
Dampener along the River Bank.
Tree
Plantation
Road along the river Bank
PROTECTION
OF ROHMORIA AREA FROM EROSION OF THE
BRAHMAPUTRA
A
pilot project has been taken up with financial support from OIL India Ltd for
anti – erosion measures. The project may cost Rs 2 to Rs3 Crores. In the
meantime OIL has released Rs 5.Lakhs. Work on construction of Steel pipe dampner
at the erosion site has already been started and two dampeners completed. During
recent visit of Hon’ble Prime Minister of India to Dibrugarh on 21 April
Hon’ble Chief Minister of
Assam
has
submitted memorandum highlighting financial scenario of state and need for
economic package for all round development of the state.
Photo
Gallery :
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Showing the
left bank of Anant nalla at about 2 km
downstream of the offtake.The photo clearly shows the easily collapsing
bank material made up of send and silt only. |
| Showing more resistant sand
layers with clay contents. The reach is in the vicinity of the tea estates
at Digaltaranga. |
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Showing the right bank reach
where a small channel under development entering in to the Reserve Forest
area. This reach is about 7 km downstream of Anant nalla offtake |
| Showing the right bank of
Anant nalla (Reserve Forest region) at about 6 km downstream of the
offtake point. The sand layer above the erosion resistant sand mixed with
clay. |
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Showing
the small channel meeting Anant nalla channel. The confluence was located
about 3-4 km downstream of the offtake. |
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