Indus River in the course of centuries built up its own bed and runs on a ridge and ground level on its both sides of slopes away. Before the construction of Sukkur Barrage, there were few Zamindari Bunds but after the construction of barrage, bunds all along both sides of the river in plain area were also constructed.
To control on right side, Sukkur-Larkana (SL) Bund and Larkana-Sehwan (LS) Bunds were constructed. As river flows in meandering hence the flow pattern in river is like English alphabet letter 'S', having series of curves.
The curve on its concave side always remains in active erosion action and on convex side it deposits the over suspended load carried from erosion portion as well as present in water suspension. The scouring and hitting action of river water has damaged and wiped away different portions of SL & LS Bunds resulting in formation of new front line bunds and second line of defence bunds.
Southern Dadu comprises the following River Bund on the Right Bank of Indus River and flood Protective Bund, which face the strong water brought by various Nais emerging out from the Khirthar Mountain Range.
The LS Bund was constructed during 1930s as a component part of Lloyd Barrage Scheme to protect big and small towns, the barrage command area and irrigation network of Sukkur Barrage from Indus spill. LS Bund is under administrative jurisdiction of Southern Dadu Division. The super flood of Indus River was announced by the Irrigation Department and flood emergency was declared. The maximum discharge of flood water ie 1,124,720 cusecs passed from Sukkur Barrage on 09-08-2010, disastrous situation was developed in whole province of Sindh.
The LS Bund from 77/2 to 102/0 is under the administrative jurisdiction of Shahbaz Irrigation Division, Sehwan. The super flood water of Indus touched LS Bund in 2010 from mile 77/2 to 102/0 with different gauges in duration of about 45 days. Due to eastern winds, the serious wave wash action was experienced and bund sustained severe damages from mile 77/2 to 102/0, specially the toe and river side from slope of the Bund was badly eroded due to serious wave wash action from mile 84/0 to 920.02.
No leaks occurred along LS Bund from mile 95/2 and 99/7, after taking extra best technical efforts, the situation was brought under control. Likewise, Sehwan Protective Bund and Sann Veeh Dari Bunds were also constructed in 1930s. Both require stone pitching work as some of the portions of these Bunds were damaged during 2010 super flood. This information has been published by the Irrigation Department recently. A visit to Jhali Bund near Naundero showed that rats had made so many holes into the Bund and the stone pitching work carried out recently has almost been invisible as all the stones have fallen down and the protective bund seemed very weak.
The substandard stone pitching work wherever carried out in Sindh must be thoroughly investigated by Pakistan Engineering Council experts as far as their quality of work is concerned to determine whether this stone pitching work was carried out as per the prescribed specifications or the same have been violated and fix the responsibility of negligence to ensure proper utilisation of tax payers wealth, the villagers living along Indus River have demanded.
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