1. SUBMITTED BY : -
Rajesh.V.Chudasama
Reg . No : 3111017003
Second Sem B.F.Sc
SUBMITTED TO : -
Dr. Ritesh.V.Borichangar
Nodal Officer &
Asso. Prof, COF
2. Ukai also known as Vallbhsagar , is the largest reservoir in Gujarat
situated on the river Tapti .
Tapti river originates from Betul Madhayapradesh and meets in
Arebian Sea.
Its length is 724 km & 65,145 catchment area.
Tapti river on two reservoir.
1. Ukai dam is located on tapti river at 90 km , distance having
62,225 sq km catchment area .
2. kakarapar weir is situated having 62,801 sq. km catchment area,
at distance of 120 km.
3.
4. latitude location is
21.32604 degree N.
longitude location is
73.88114 degree E.
5. Ukai dam constructed in 1972 and construction cost is
1389.6 Million.
The site is located 94 km from Surat.
Height - 80.772 metres ( 270 ft ).
Length – 4,927 metres ( 16,000 ft ).
Catchment area – 62,225 Kilometre square.
Water spread of about 52.000 ha .
6. Water quality of Ukai dam ( surface values )
The water is rich in nutrients and dissolved salts.
Parameters Range in variation
1. Water Temperature (°C) 20.0 – 32.6
2. Transparency (cm) 8.5 – 328.0
3. pH 8.0 – 8.4
4. Dissolved oxygen (mg/l) 3.7 – 14.0
5. Carbon dioxide (mg/l) Nil – 20.1
6. Carbonate (mg/l) 0.2 – 30.0
7. Bicarbonate (mg/l) 98.0 – 366.0
8. conductivity 41.0 – 585.0
9. Ca (mg/l) 12.0 – 58.0
10. Mg (mg/l) 6.7 – 33.8
11. N (mg/l) 0.02 – 0.09
12. P (mg/l) 0.012 – 1.00
13. Silicates (mg/l) 0.02 – 28.0
7. The organically rich bottom is favourable for the rapid growth
of benthic organisms.
Yera Volumetric Abundance of plankton (
ml/m cube )
1. 1976 – 77 5.26 to 6.60
2. 1977 – 78 12.5 to 22.5
3. 1978 – 79 2.0 to 35.5
4. 1979 – 80 1.0 to 6.3
5. 1980 – 81 0.95 to 11.0
6. 1981 – 82 0.3 to 6.7
7. 1982 - 83 0,23 to 12.6
11. 5. Wallago attu
CULTURE FISH : -
Stocking of the reservoir was initiated in 1972, when it was still in formative stage.
After the initial stocking, fishing was not allowed for three years to facilitate building-up of a
stock of carps.
During the period between 1972 and 1977, more then 5 million fry/fingerling (30-150 mm) of
catla (40.9%), rohu (29.0%) and mrigal (30.1%) were stocked into the reservoir, along with 1600
of their brooders.
12. In the subsequent years, the stocking rate was erratic, varying between 65000
to 3 million.
The species composition of 4:3:3 for catla, rohu and mrigal was more or less
followed over the years.
1. Catla 2.Rohu 3.Mrigal
13. Fish catch sold through cooperative societies
1975–76 1976–77 1977–78 1978–79 1979–80
Total catch (t) 240.0 204.3 149 204 138
Catla catla(%) 16.55 20.55 33.70 38.80 22.05
L. rohita(%) 51.85 36.00 30.60 27.20 24.05
C. mrigala(%) 13.25 14.85 14.67 13.50 17.20
Tor tor(%) 6.55 7.90 6.01 5.05 19.06
Misc.(%) 11.80 20.70 15.02 15.45 17.64
