Agreements & MOUs - The Ganga: Water Use in the Indian Subcontinent - page 158

Table 10.4 Actual 10-daily flow distribution against agreement quantity (cumec) of 1980

Distribution

Actual

India Bangladesh

Agreement quantity

Period quantity available Agreement Actual Agreement Actual

1 2 3 4 5 6 7

January 1-10 2789 2681(-4) 1132 1011(-11) 1656 1670(+1)

11-20 2541 2278(-10) 1091 976(-10) 1451 1302(-10)

21-31 2336 1724(-26) 991 641(-35) 1345 1083(-19)

February1-10 2244 1445(-36) 934 393(-58) 1309 1052(-20)

11-20 2095 1379(-34) 892 412(-54) 1203 967(-20)

21-28/29 1982 1369(-31) 871 481(-45) 1111 888(-20)

March 1-10 1847 1356(-27) 757 482(-36) 1090 874(-21)

11-20 1798 1288(-28) 722 433(-40) 1076 855(-21)

21-31 1727 1134(-34) 708 318(-55) 1019 816(-20)

April 1-10 1670 1117(-33) 680 322(-53) 991 795(-20)

11-20 1571 1231(-22) 587 440(-25) 984 791(-20)

21-30 1557 1254(-19) 580 458(-21) 977 796(-19)

May 1-10 1600 1568(-2) 609 609(-0) 991 959(-3)

11-20 1678 1838([phone]([phone](+11)

21-31 1854 2085([phone]([phone](+13)

Table 10.5 Minimum quantity of water available against original demand (cumecs)

Original demand Minimum as per agreement Minimum as available

India Bangladesh India Bangladesh India Bangladesh

1132 1246 580 (37%) 977 (63%) 458 (36.5%) 796 (63.5%)

point, - which reduced substantially in post-Farakka period had to be increased
from 1980.
The Calcutta Port is about 230 km from the sea face of the Hooghly. In pre-
Barrage days, maintenance of this long navigation channel with 15 major sand
bars was a challenging task. Of the total length, the upper reach from Calcutta to
Diamond Harbour is about 75 km and the lower reach from Diamond Harbour
to the Sandheads is about 155 km. There are 17 sand bars on this course, which
hinder navigation. This channel required constant dredging in pre-Barrage days,
as it used to shift its courses in flow and ebb tides in various alignments. The
bars also changed directions in two tides in a day, as also in different flow con-
ditions owing to seasonal changes. The alluvial river-bed as well as bank materials,
coupled with unpredictable morphological changes in the estuary aggravated the
problems of Calcutta Port, requiring manifold increase in the volume and cost of
dredging.
The diversion of assured 40,000 cusecs in the river continuously for at least
five years, as advised by Dr. K. L. Rao, India's Minister of Irrigation and other