MALKHED WATER SUPPLY-----SHAFT

MALKEED WATER SUPPLY SCHEME, TALUKA NER DIST. YAVATMAL
BRIEF NOTE ON USE OF SHAFT 1993
Use of shaft in place of ESR has been done first time at Malkhed village in Dist. Yavatmal. The Item was not included in the sanctioned scheme. But it was impossible to include ESR in the sanctioned scheme unless revision was proposed and sanctioned. Concept of BPT was already experienced and formulated in mind after the actual execution of Amaravati water supply scheme. Shaft concept was little modification of BPT having a rising main in the external M.S. pipe used as a shaft. The issue was discussed with Dr. Ingle while execution of Amaravati BPT. Due to problem of handing over of the Malkhed water supply scheme shaft was required to be constructed. Being the first effort of this kind thorough evaluation was required. It was decided to verify the discharge and pressures in the system. The results were informed to Dr. Ingle. He wanted to see the performance personally. Visit of Dr. Ingle and Dr. Dhabadgaonkar was arranged at Malkhed. He was happy to see the results, and appreciated the efforts. On the same day the scheme was handed over to the village Panchayat at the hands of Dr. Ingle. Brief details are given below. Numbers of shafts were erected in the District and everywhere the performance was excellent. Maharashtra Jeevan Pradhikaran had taken a note of the issue and circular was issued in favour of the application of shaft in small villages. After some years shafts as high as 26 m height were constructed at Amaravati and Trimbakeshwar and are still in use. Theoratical and construction aspects of shaft are given separately.

Malkhed Water Supply Scheme was sanctioned in the year 1985, costing Rs. 5.36 Lakh (gross). The execution was started from 1986 and by 1989 the schemes was put in to operation. The yield of supply well of this scheme is much more than the requirement of village. The work of GSR was completed in 1990. The site as per sanctioned scheme was required to be shifted due to Forest land. The GSR work was completed and supply through GSR was started from 4-2-1991. The discharge through stand posts was found on lower side in the opinion of villagers. To restore required pressure master pieces were introduced on the distribution lines, leading to low lying stand posts. There after some modifications were carried out in realigning of pipe lines. Then the village was divided into three zones, comprising of 3, 4 and 5 stand posts in each zone respectively.
After all above modifications, the supply was continued in last summer. Minimum required supply as per present norms i.e. 10 lit/min/tap was available on all stand posts by zoning.
However, the villagers were demanding E.S.R. Since, this work was not included in the sanctioned scheme; it could not be taken up. To get rid of this situation a tower of 7.8 m height is installed on GSR and the supply is now started through this tower. This has resulted in increasing pressure on all stand posts up to the satisfaction of villagers. Readings of discharge through all stand posts at every stage of improvement have been recorded and tabulated as per enclosed statement.
Though the yield of supply well is sufficient to fulfill the requirement of village at present, the work of under ground bandhara is completed in “summer – 1992” and a Gambian type bandhara is constructed is summer 1993.
Sanction cost of this schemes in Rs. 5.36 Lakh gross. Upto date expenditure incurred on this scheme is Rs. 4.94/- Lakhs up to March 1993, excluding cost of tower. Cost of tower and bandhara works out to Rs. 70,000 including all materials and labour. Thus from overall savings on the scheme, these works of tower and bandhara have been completed.
Advantages and dis-advantages of providing of shaft as against ESR may be narrated as below:
Advantages :-
1) Manufacturing and erecting time is much les than construction of ESR.
2) Cost is much low.
3) Supply to village can be started as soon as pumping starts. In ESR considerable time is required to fill up ESR.
4) Except storage, shaft serves the purpose of break pressure tank surge tank, and shaft type air valve etc.
Disadvantages :-
1) The only disadvantage is that there is no storage, as such power failure may interrupt the supply.
The only bottle-neck in this scheme was low pressure on stand posts. Erection of M.S. lower has solved this problem up to the satisfaction of villagers and village panchayat has immediately taken over the scheme on date 20-2-1993. The scheme is being run smoothly by village Panchayat.