Irrigation works : $b the principles on which their design and working should be based, with special details relating to Indian canals and some proposed improvementsBellasis, E. S. (Edward Skelton)
Science
Irrigation works : $b the principles on which their design and working should be based, with special details relating to Indian canals and some proposed improvements
Bellasis, E. S. (Edward Skelton)
Canals; Irrigation
1,164,595 acres | 8,631| 8,721|6,590|4,576|4,128|4,364| 5,211| 5,591
| | | | | | | |
Add absorption for| | | | | | | |
new projects | 3,414| 3,414|2,139|2,139|2,139|2,139| 3,414| 2,564
+------+------+-----+-----+-----+-----+------+------
Supply required | | | | | | | |
for new projects | | | | | | | |
at heads of canals|12,045|12,035|8,729|6,715|6,267|6,503| 8,625| 8,155
------------------+------+------+-----+-----+-----+-----+------+------
“The average discharge given by the third line is 5,546, and the average
area being 1,155,685 acres, the duty at the heads of distributaries was
208.
“The area 1,164,595 is the perennial rabi irrigation of the new
projects, the area 156,424 acres, receiving only first waterings, being
omitted to admit of a fair comparison, and is only 1 per cent. under the
average attained on the Chenab Canal in the three years for which the
table is prepared.
“The absorption added for the two first periods is on the supposition
that all the canals are open throughout October and March, tatilling[46]
with an average absorption loss of 2,139 cusecs[47] being in force
during the other four months. The last line of the table shows the
average Rabi discharge required by the new projects at the heads of
canals, inclusive of all losses calculated on the Chenab Canal basis of
a duty of 208 acres per cusec obtained at the heads of distributaries.
[46] “Tátíl” is the Indian word for rotational closure.
[47] “Cusec” is used in India for c. ft. per second.
“The Bari Doab Canal statistics furnish the means of the adequacy of
available supply being gauged. The following table furnishes particulars
for the average supply of water entering the head of the canal for the
five years 1898-99, 1899-1900, 1901-02, 1902-03, 1903-04. The figures
for the year 1900-01 are omitted, as it was a very abnormal one of very
plenteous supply and heavy rainfall:--
“The average irrigation for the five years in question was 442,302
inclusive of 11 per cent. which only receives first waterings. This
divided by the average supply, 1,685, entering the head of a canal gives
a duty of 263 acres per cusec at the heads of distributaries.
BARI DOAB CANAL.
Public-domain text, read in full here on John Shaqi.
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