Table 2 Field collected data and calculated discharge.

From: Introducing winter rice cropping by using non-saline tidal water influx in western basins of South 24 Parganas, India

Canal name

Length (km)

Canal code

Pt No

C/S area BT (m2)

C/S area AT (m2)

Mean C/S area (m2)

% incr. AT

Tidal vel. (m/s)

Calculated discharge (m3/s)

Upper Keorapukur Khal

14.07

A

1

3.73

3.73

3.73

0

UD#

0

2

5.24

7.94

6.59

51.50

0.42

2.76

Hotor Khal

19.68

B

1

63.38

129.45

96.41

104.20

0.48

46.28

2

50.50

108.31

79.41

114.50

0.84

66.70

3

19.05

27.28

23.17

43.10

1.02

23.63

4

8.09

16.43

12.26

103.10

1.10

13.49

Suryapur Inner Channel

16.61

C

1

48.94

106.97

77.95

118.60

1.71

133.31

2

40.69

54.85

47.77

34.80

1.56

74.53

3

37.19

48.85

43.02

31.40

1.62

69.70

4

33.94

44.27

39.11

30.40

1.70

66.48

Usti Nainan Outfall Channel

10.8

D

1

47.64

105.57

76.61

121.60

1.20

91.93

2

182.74

306.00

244.37

67.50

1.40

342.12

Kata Khal

7.97

E

1

39.37

51.71

45.54

31.40

0.80

36.43

2

33.94

44.97

39.46

32.50

1.90

74.96

Sangrampur Khal

11.78

F

1

38.59

50.94

44.76

32.00

0.50

22.38

2

43.51

61.02

52.26

40.20

1.12

58.54

Joynagar Khal

5.30

G

1

39.75

53.07

46.41

33.50

1.67

77.51

2

2.08

3.84

2.96

84.20

1.64

4.86

Upper Dhanpota Khal

7.88

H

1

20.02

27.63

23.83

38.00

0.3

7.15

2

14.04

21.06

17.55

50.00

0.12

2.11

Hara Khal

21.09

I

1

74.29

123.07

98.68

65.70

2.42

238.82

2

16.49

25.48

20.99

54.50

1.79

37.57

3

17.25

26.74

21.99

55.00

1.23

27.05

4

5.01

8.77

6.89

74.90

0.72

4.96

5

39.39

39.39

39.39

0.00

0.48

18.91

Kulpi Khal

16.40

J

1

50.65

98.83

74.74

95.10

2.36

176.40

2

21.33

40.55

30.94

90.10

2.01

62.19

3

21.33

40.55

30.94

90.10

1.74

53.84

4

11.63

17.60

14.62

51.30

1.08

15.79

5

11.63

17.60

14.62

51.30

0.82

11.98

Upper Hatuganj Khal

3.75

K

1

5.92

9.98

7.95

68.50

0.53

4.21

2

6.01

10.06

8.04

67.50

0.34

2.73

Nazra Khal

3.73

L

1

13.31

19.56

16.43

46.90

0.63

10.35

2

N/A

N/A

N/A

N/A

N/A

N/A

Srichanda Khal

9.29

M

1

67.68

114.24

90.96

68.80

0.75

68.22

2

0.71

3.46

2.09

382.30

UD#

0.00

Dasani Khal

16.19

N

1

13.17

19.42

16.29

47.40

1.34

21.84

2

12.17

14.45

13.31

18.80

0.66

8.78

3

37.38

55.84

46.61

49.40

1.42

66.19

4

4.07

4.07

4.07

0.00

0.53

2.16

Diamond Harbour Creek

15.33

O

1

186.12

309.73

247.93

66.40

2.40

595.02

2

187.46

305.55

246.51

63.00

2.02

497.95

Kholakhali Khal

6.63

P

1

68.54

121.06

94.80

76.60

1.99

188.65

2

11.73

32.03

21.88

173.00

0.72

15.76

3

N/A

N/A

N/A

N/A

N/A

N/A

Lower Keorapukur Khal

14.68

Q

1

15.13

22.89

19.01

51.30

1.30

24.71

2

29.98

42.89

36.44

43.00

1.20

43.73

3

5.63

11.19

8.41

98.70

1.20

10.09

4

19.27

23.65

21.46

22.70

1.60

34.34

Lower Hatuganj Khal

9.98

S

1

6.11

10.25

8.18

67.80

0.82

6.71

2

14.15

21.33

17.74

50.80

0.32

5.67

Adi Ganga Canal

17.81

T

1

2.36

7.30

4.83

208.40

0.63

3.05

2

44.20

57.71

50.95

30.50

0.91

46.37

Lower Dhanpota Khal

6.27

V

1

0.34

0.82

0.58

138.80

0.24

0.14

2

1.38

1.92

1.65

39.30

UD#

0

  1. N/A not applicable, UD# undetectable, C/S cross-sectional, incr. increase, AT after tide, BT before tide.
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