International Journal of Mechanical and Production Engineering Research and Development (IJMPERD) ISSN (P): 2249–6890; ISSN (E): 2249–8001 Vol. 10, Issue 3, Jun 2020, 7761-7768 © TJPR Pvt. Ltd.

INTER BASIN WATER TRANSFER - CASE STUDY OF NAR-PAR-GIRNA LINK PROJECT

HRISHIKESH R. KANE1, K. S. ANSARI2 & ANIKET PATHADE3 1B. E. Civil, Sr. Executive, Ceinsys Tech. Ltd. Nagpur (M. S.) 2YCCE, Nagpur, 3Research Scientist, Jawaharlal Nehru Medical College, Datta Meghe Institute of Medical Sciences, Sawangi, Wardha, India ABSTRACT

Water, as essential as it is for the survival of mankind and livestock, freshwater in the world is limited in its supply. Due to rapid population growth, the demand of water for agriculture, industries, domestic use, power generation, etc., is ever increasing. Moreover, the Spatiotemporal distribution of the precipitation is quite uneven. Due to this uncertainty, the dependency on the storages pertaining to a single basin/sub basin may not assure the planned inflow every year. Some basins may have heavy rainfall/spill and others may have deficit. This flooding and draught have adverse socio-economic impact on developing country such as ours.

Original Article Original

Recognising this fact Govt. of tasked NWDA (National Water Development Agency) with studying the feasibility of 23 intra-state links proposals to divert the unutilized waters of west flowing rivers i.e Nar, Par, Damanganga, Vaitarna, Ulhas and Patalganga etc.

This paper reviews the planning of Nar-Par-Girna interlinking project (DPR cost Rs. 6277.93 Cr. With B. C. ratio of 1.07, and IRR-8.98) in of Maharashtra which is planned to stabilise the existing command (56650

Ha) of draught prone areas of Nashik (39626 Ha) and Jalgaon (17024 Ha) district.

KEYWORDS: Interlinking, Lifting, Diversion, Conveyance, Water availability & Command Area

Received: Jun 05, 2020; Accepted: Jun 25, 2020; Published: Aug 11, 2020; Paper Id.: IJMPERDJUN2020738

INTRODUCTION

The project involves transfer of 304.60Mm3 of water (Drinking- 41.61Mm3, Industrial -50.04 Mm3, Irrigation – 185.69Mm3, Evaporation- 27.26 Mm3) and local use for 6600 Ha. from total 9 No. of Pump house sites with high capacity Submersible pumps situated on periphery of 9 dams (Nar basin-5 dams, Par Basin- 2 dams, Auranga Basin- 2 dams). Three links are formed each with 3 dams. Water pumped from each link is delivered via series of M. S. Rising Main to an intermediate pumping station (Salbhoya Sump), from there the water is again lifted to head of a tunnel on higher elevation. This tunnel opens up above F. R. L of Chankapur dam (Dam on Girna river, Nashik Dist.). Chankapur Dam acts a balancing storage for the inflow from the lifting sites at Nar-Par-Auranga basins.

Chankapur onwards, there is existing distribution network of canal in Nashik district up to some extent, the existing network (19396 Ha) is proposed to be stabilized from this project by discharging the requirement in the canal system and a virgin command of 20230 Ha. is to be irrigated through PDN network. Demand of Jalgaon District (Existing command under Girna dam- 17024 Ha.) is proposed to be stabilized by discharging the deficit

www.tjprc.org SCOPUS Indexed Journal [email protected] 7762 Hrishikesh R. Kane, K. S. Ansari & Aniket Pathade requirement in to the Girna reservoir via gravity main.

OBJECTIVES

To study the techniques and methodology used in planning and optimization of Nar-Par Girna Link project scheme.

METHODS

The pre- feasibility report based on toposheet study of the Nar-Par scheme envisaged on creation of 13 storages and 13 pump houses to lift and convey the water through rising mains and 2 major tunnels, with a concept of making the 3 links to operate independently.

However, detailed studies of Hydrology, Flood study, Water planning, Topographical survey, Geological survey, Construction Material survey, Identification of storage sites, Foundation exploration, Demography and climatic conditions facilitated the optimum planning and design of the various components of scheme.

Topic/ component which played crucial role in Planning and designing wise details are as follows.

Hydrology and Water Planning

Monthly yields of catchments of each storage are worked out by the RR equations. These monthly yields are used in the Reservoir simulation studies (1991-2017, 26years). The scheme lifts most of its share during the monsoon season. Ample storage is available in the Girna reservoir, thus the demand for Jalgaon district is proposed to be lifted in the monsoon season only. Simulation studies plays an important role in maximizing the potential of the infrastructure provided i.e. synchronization of the pumping, using dams as balancing storages.

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Figure 1: Index Map

Simulations Facilitated the Optimization of Available Storages (F. R. L. Reduced, 3 Dams Discarded)

The lifting schedule of the scheme is tabulated below (Table 2). It shows the yearly demand of Jalgaon is being lifted in Monsoon period, and Demand for Nashik district is lifted throughout the year. Lifting during monsoon from run of the river reduced the total quantum of storage that needed to be stored in the Nar-Par scheme, which in turn reduced the numbers of dams from 13 to 9 No.

Table 1: Yield statements of Dams at Nar Par Sr. Catchment Area 75% Monsoon Yield P. M. Yield Annual 75% dep Link Name of Dam No Km2 Mm3 Mm3 Yield Mm3 1 Umbarpada 50.86 40.27 0.81 41.08 L-1 2 Saranya-awan 31.24 28.94 0.58 29.52 3 Pratapgad 41.38 29.39 0.59 29.98 4 Rakshasbhavan 102.61 81.06 1.62 82.68 L-2 5 Milan 52.85 37.53 0.75 38.28 6 Ghodi 24.73 17.56 0.35 17.91 www.tjprc.org SCOPUS Indexed Journal [email protected] 7764 Hrishikesh R. Kane, K. S. Ansari & Aniket Pathade

7 Ukhedmal 27.75 22.19 0.44 22.63 L-3 8 Sawarpada 112.69 84.39 1.69 86.08 9 Devmal 14.99 10.65 0.21 10.86 Total 351.98 7.04 359.02

Table 2 shows that the peak monthly lifting from all the sites in terms of discharge is also equalised i.e. 14.14 cumecs, by adjusting the discharge for Jalgaon district as the yearly demand of Jalgaon is getting stored in Girna Dam in monsoon season only.

Table 2: Lifting Schedule from Dam Sites Irrigation Domestic and Transit Total Lifting Schedule Use Industrial use Loss Sr. Yearly Yearly Total Peak Months 3 3 3 3 No. Mm Mm Mm Mm Demand Demand Monthly Monthly of Jalgaon of Nashik Demand Demand 56650 56650 56650 Ha 56650 Ha Mm3 Mm3 Mm3 Cumecs Ha Ha 1 Jun 2.44 7.64 1.29 11.36 4.08 7.28 11.36 4.38 2 Jul 1.37 7.64 1.23 10.23 29.63 7.01 36.64 14.14 3 Aug 3.35 7.64 1.37 12.35 29.09 7.55 36.64 14.14 4 Sep 14.91 7.64 2.22 24.77 24.08 12.56 36.64 14.14 5 Oct 15.58 7.64 2.29 25.51 21.76 14.88 36.64 14.14 6 Nov 18.55 7.64 2.49 28.68 0 19.19 19.19 7.4 7 Dec 29.99 7.64 3.37 40.99 0 28.19 28.19 10.88 8 Jan 31.31 7.64 3.49 42.43 0 29.13 29.13 11.24 9 Feb 18.23 7.64 2.43 28.3 0 19.07 19.07 7.36 10 Mar 19.22 7.64 2.56 29.42 0 19.41 19.41 7.49 11 Apr 19.38 7.64 2.56 29.58 0 19.11 19.11 7.37 12 May 11.37 7.64 1.97 20.98 0 12.58 12.58 4.85 Total 185.7 91.65 27.25 304.6 108.64 195.96 304.6 14.14

Flood calculation and Routing – The historical flood and storm data were not available and therefore, synthetic unit hydrograph on the basis of geo-morphological catchment characteristics such as length of stream, slopes etc. Set of equations have been established for estimating the parameters of such synthetic unit hydrographs, peak flood, time to peak flood, width for 50% and 75% of peak flood, base time etc. The flood hydrograph is obtained by applying the storm to so derived unit hydrograph. The flood has been calculated from SUHG and is based upon Flood depths given by CWC. Routed flood is calculated by superimposing the floods occurring simultaneously on the reservoirs on same streams by lagging them by the time taken by upstream spilled discharge to reach the dam on downstream. The routed flood is used to design the overflow sections of Dam.

Table 3: Flood and Routed Flood Abstract 100 Yrs Flood Link Sr No Storage Routed Flood Cumecs Cumecs 1 Umbarpada 681.09 584.52 L-1 2 Saranya-awan 273.71 243.54 3 Pratapgad 565.57 523.82 L-2 1 Rakshasbhavan 2081.67 1723.22

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2 Milan 1536.84 1359.39 3 Ghodi 248.85 210.57 1 Ukhedmal 276.1 254.17 L-3 2 Sawarpada 1399.22 1274.98 3 Devmal 172.58 145.47

Dam (Overflow, Non overflow and Earthen Dam Sections)- Overflow sections (Ungated Ogee Spillways with Horizontal Apron type EDA arrangement) at Nar-Par-Girna Link Project are designed to Discharge the Maximum 100 Years flood (Obtained from Synthetic Unit Hydrograph method of Maximum Flood Estimation)

Concrete Non overflow section enveloped by Earthen dam sections is provided.

Since sufficient suitable hearting material is not available, “R. C. C Diaphragm type Earthen Dam” are proposed at all dam sites of Nar-Par. The stability of upstream and downstream slopes of earth dam is checked by Swedish Slip Circle Method, in Software by Geostudio-2018, Slope-W.

Pump House and Pumps - On the basis of Sedimentation studies and controlling levels (FRL, MWL, NZE) of the respective dams, controlling levels of pump house were finalized (SBL (Sump bottom level), MDDL, VFL (Valve floor level). Pump houses were proposed to be installed on the fringe of the reservoirs with approach channels from MDDL. Widths of pump houses at each storage are dependent upon the number of the pumps to be installed whereas, height of pump house is dependent upon the difference in HFL-MDDL (i.e. pump operating level). Submerged vertical turbine pumps are proposed in Nar-Par-Girna Link which are vertically Mounted and are resting on The Raft of Pump House, The Pumps have zero suction Head and have Efficiency varying between 82% to 85%. These pumps are preferred due to the high head variations in the submergence levels in pump house, lesser infrastructure requirements and lower maintenance cost compared to VT pumps.

MS Rising Main- Using the economical diameter of MS rising main program, the designs (Diameter, numbers and thickness) of M. S. rising mains were finalised. The terminals of rising either opens in the tunnels or on the fringe of reservoir above the HFL level, depending on the topography. Delivery chamber is proposed for energy dissipation arrangement with 1-minute detention time at the Terminals of each conveyance system, Tunnels are designed to cater for Discharge requirement. The factors considered are velocity, FSD, slopes and workability (Ease of work).

• Piped Distribution Network (PDN) is proposed on the Virgin command area of Nashik. PDN design is done on Water- gems by Bentley.

Whole system is proposed to be operated under SCADA automation (Pump operation, PDN system) so that the transfer of water is synchronised smoothly and error free.

www.tjprc.org SCOPUS Indexed Journal [email protected] 7766 Hrishikesh R. Kane, K. S. Ansari & Aniket Pathade

Figure 2: Index Map- Command Area (Part 1)

Figure 3: Index Map- Command Area (Part 2)

CONCLUSIONS

For the efficient management of the Rain water in India, the only solution is to implement Inter basin and Intra basin water transfer concepts. The cost of the river interlinking projects can rise considerably if planned poorly. However, the high capital cost of infrastructure and recurring cost of energy requirements of such projects can only be reduced by efficient planning of Water transfer, Storage requirements, Efficiency of the components of LIS, State of the art technologies for automation of the system and an efficient distribution network.

Nar-Par-Girna river link is an example of one of the well thought out scheme of Inter- basin water transfer.

REFERENCES

1. Amarasinghe U, Sharma B et al. Spatial variation in water supply and demand across river basins of India. Research Report 83. International Water Management Institute, Colombo, Sri Lanka.

2. Bhaduri A, Amarasinghe, U et al. Assessing the Irrigation benefits of India’s River Linking: Case study- Godavari Krishna Link. (Unpublished report). International Water Management Institute, New Delhi. 2007.

3. GOI (Government of India) (1999a). Integrated Water Resources Development. A Plan for Action. Report of the Commission for Integrated Water Resource Development Volume I. Ministry of Water Resources, New Delhi, India.

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