'ANNUAL REPORT OF THE ADMINISTRATION OF THE BOMBAY PRESIDENCY, FOR THE YEAR 1908-1909' [‎122v] (106/132)

Chap. IV.
PRODUCTION
AND
DISTRIBUTION.
72
BOMB A.Y ADMINISTRATION REPORT.
[ 1908 -
' 1909 .
as
K hair pur Boundary
Pillars.
The borings for the
Sukkur Barrage.
The River gauges.
The Delta Section
Lines.
Discharges of the
Indus.
The work done was good. It consisted of a survey of 74 miles of the river in the n
from Kashmor to Sukkur, the whole distance along the^rivei being 103 miles. Below Snhi
the survey of the river extended from the head of the Boghar Dhund (lo miles below Snkk
to Puranodero, a continuous length along the river of about 130 miles, and in addition to ti?
surveys were made of dhunds, bunds and channels cover mg 90 miles.
In the south the survey was carried from the bifurcation along the Uchito branch as far
Keti Bunder, about 50 miles. This town is threatened by erosion ; the progress of this erosi
is being carefully recorded. It is probable that the town will have to be moved to a n»w
site next year.
Fresh cross-sections of the Indus have been taken at intervals of a furlong for 3
above and 3 miles below the Kotri bridge, to observe the variation in the bed level. TlT
previous cross-sections were taken in 1899, 1900, 1901 and 1905.
Cross-seetions were also taken at the bifurcation for about two miles upstream and on
mile downstream on each of the branches; the condition of the Uchito branch has a direct
influence on the river and sea traffic at Keti Bunder.
No establishment was available for the survey of the Gudu and Khariri Dhunds in the
extreme north. The supply does not seem to have been deficient in the channels.
The usual inspection of the Khairpur Boundary pillars was made. Bail Nos. 6, 31 a]K |
32 on the Left Bank were found in danger of loss by erosion. They were therefore removed
and placed further inland. The necessary corrections have been made in plans.
A large number of borings were made to ascertain the level of the rock in the river bed
at the site selected for the Sukkur Barrage.
The gauges at the Haideri and Uchito Mouths are being read daily at high and low tides.
The other river gauges are :—
(a) Opposite the Desert Canal Mouth.
(]j) Opposite the Unharwah Mouth.
(c) Opposite the Bajibwah Mouth.
[d) At Bukkur.
The northern gauges have yielded information very useful for deciding the probable
maximum flood level in the river and the proper level for the protective bunds.
The hydrographs for each of the gauge stations will be published in the Indus River
records.
No work was done in this connection during the year for want of establishment.
The discharges were observed at Sukkur and Kotri all the year round and at Dera Ghazi
Khan during the cold season only.
The maximum discharge measured at Sukkur during the year was 821,511 cusecs on the
2nd of September 1908, the mean velocity being O'GS feet per second and the Bukkur Gauge
reading being 14‘6 feet. But the, highest reading on Bukkur Gauge was 16*1 on the 13th of
August 1908 and the estimated discharge on that day was about 494,613 cusecs, the low
discharge being due to the sluggish flow.
The minimum discharge measured this year at Sukkur was 25,712 cusecs on 1st of April
1908, the mean velocity being T62 ft. per second and the Bukkur Gauge reading being —2'0
feet. But the lowest reading on Bukkur Gauge was — 2’40 feet on the 25th of February
1909, and the estimated discharge on that day was 37,410 cusecs.
The comparison of the discharges of the Indus at Sukkur during the Abkalani months—
June to September—for the years 190U1905 to 1908-1909 is o-iven below
(<?) At Bagatoro near Sehwan.
(/) At Kotri,
($) At Jherruck.
Month.
1904-1905.
1905-1906.
1906-1907.
1907-1908.
1908-1909.
C. ft.
C. ft.
* C.ffc.
C. ft.
C. ft.
June
July
August
September ...
8,466,000
10,736,000
13,711,000
5,045,000
11,845,000
13,227,000
10,567,000
8,243,000
7,497,000
12,522,000
16,263,000
12,431,000
7,051,000
7,193,000
12 , 060,000
5,149,000
7,693,000
13,094,000
15,567,000
15,383,000
Total* ...
37,958,000
43,882,000
48,713,100
31,453,000
51,737,000
Average discharge
311,131
359,689
399,287
257,811
424,074
Maximum do. measured
542,739
530,842
616,580
425,289
821,511
Minimum do. do.
96,178
166,551
212,613
139,013
158,135
Minimum discharge throughout the
year measured
27,751
22539
32,951
26,462
25,712
Quantity nf waf gUres UU eSen . , sum of daily discharges in cusecs of the river, and to arrive at tne
hr a day. 1 tel P asaiD g bukkur in the 4 months the total must be multiplied by 86,400 or the number of secc
f
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