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After independence, many water resources development projects have come
up in these basins.
Hirakud
Canal
System
Large tracts in Sambalpur District are
irrigated by this major irrigation system. These works were built after
independence. The flood waters of Mahanadi
River are stored at Hirakud Dam and are distributed for irrigation in later
months. A part of the stored water gets transported to the Brahmani
basin.
Rengali Dam
Rengali is an earthen and rockfill dam constructed
on
Brahmani
River, located at a distance of
80 km from Angul in Angul
District, Orissa. The height and length of the dam is
70.5 and 1,040 m respectively.
Rengali
reservoir is the second largest man-made lake in Orissa,
covering 37,840 ha at full reservoir level and 28,000 ha at the mean level. Its
FRL is at 123.5
m and the MDDL is at 109.72 m. Regali reservoir
stores
4,400 to 5,150 Mm3 of water with mean annual inflow of 14,900 MCM.
The reservoir has a catchment of 25,250 km2,
comprising mostly forests and wasteland.
Rengali power house has 5 units of
50 MW each and a firm power of 53 MW. The water
temperature (20.25 to 29.0 °C) and pH (8.2) are conducive to reasonably high
organic productivity.
Rengali dam has the capacity to moderate the high flood of
5
to 6
lakh cusec to
3 to 4 lakh
cusec and to 2 lakh cusec or
less in approximately 30% of time. Even
with this moderation, growing a Kharif crop over 500
Mm2 of good land (low land of elevation up to 10 m) has become
unviable.
Orissa has planned to utilize some more water resources in the second phase
of Rengali Irrigation Project. Till date only Rengali dam across Brahmani and Mandira dam across Sankh have
been constructed. Water from Mandira reservoir is
being used for the Rourkela Steel Plant.
Rengali Irrigation Project: This is a barrage scheme constructed across
Brahmani
River at Samal
in Angul district, 35 km downstream of Rengali dam project. The project is designed to pick up
flood releases and tail race water from Rangali dam
and divert the same as per requirements through two canal systems. The CCA
includes both flow and lift irrigation. The salient features of Rengali Irrigation Project are given below:
Free
catchment at barrage site : 4,780 km2 (between Dam & barrage)
Total
catchment: : 30,030
km2
Mean
Annual Rainfall: : 1570 mm
For
this project, the Gross Command Area is 3,364 km2 while the culturable command area (CCA) is 2,591 km2. The
intensity of Kharif Irrigation is 100% and that of
Rabi is 90%. The Kharif cropped area is 2,591 km2
and Rabi cropped area is 2,332 km2.
Kansabahati
Irrigation Project
This is
a reservoir project constructed across Badajore Nalla, a tributary of Brahmani River
in Sundergarh district near village Kadambahal. The reservoir intercepts a catchment
area of 179 km2 and is designed to provide irrigation to a CCA of
5,050 ha. Kharif irrigation is for 4,615 ha and Rabi
irrigation for 2,430 ha. The anicut lies within Rajgangpur Block area.
Pitamahal
Irrigation Project
A reservoir project with earthen and masonry dam across the
Pitamahal
River in Sundergarh
district intercepts a catchment area of 102 km2.
The project is designed to irrigate 4,261 ha of CCA which includes 2,630 ha in Kharif season and 1,631 ha in Rabi season. The gross and
live storage capacity of the project are 27.68 and 24.00 Mm3
respectively.
Gohira Irrigation Project
This is a reservoir project with 3,550 m long earth dam built near
village Ambaghat in Deogarh
district. It intercepts a catchment area of 236 km2
and is designed to irrigate 8,100 ha in Kharif season
and 5,265 ha in Rabi season in Reamal block of Deogarh district.
Aunali Irrigation Project
This project is constructed across Aunali Nalla in Chhendipada block of Angul district near village Patrapada.
It intercepts a catchment area of 150.22 km2
and is designed to irrigate 1,188 ha in Kharif
season.
Dadaraghati Irrigation
Project
It is a reservoir project with a rock-fill dam constructed near village
Rangathali in Angul
district, across Gambharia Nalla.
This reservoir intercepts a catchment area of 102 km2
and is designed to irrigate 4,514 ha CCA with an annual intensity of irrigation
of 140%. The gross and live storage capacity of the project are 23.44 and 19.74
Mm3 respectively.
Derjang
Irrigation Project
It is a reservoir project with zoned earth-fill dam constructed across Lingra Nalla in Angul district. It intercepts a catchment
area of 394 km2 and irrigates 6,478 ha of CCA. The gross and live
storage capacity of the project are 45.28 and 41.55 Mm3
respectively.
Ramiala Irrigation Project
It is a reservoir project with rolled filled homogeneous earth dam
constructed across
Ramiala
River in Dhenkanal
district near village Budhibil. Ramiala
dam intercepts a catchment area of 328 km2 and
is designed to irrigate 9,600 ha CCA with annual intensity of irrigation of
162.5%. The gross and live storage capacity of the project are 86.00 and 69.40
Mm3 respectively.
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