Detailed Project Report of Ponnaiyar (Nedungal) - Palar Intra-state Link Project of Tamil Nadu

Salient Features

1 Name of the project Ponnaiyar (Nedungal) - Palar Intra -state link Project of Tamil Nadu

2 Type of Project Irrigation (Irrigation or Multipurpose)

3 General 3.1 River Basin (a) Name Ponnaiyar basin Palar basin (b) Located in (i) States Karnataka, Andhra Karnataka, Pradesh, Tamil Nadu Andhra Pradesh and Union territory of and Tamil Nadu

Puducherry

(ii) Country India 3.2 Name of (a) River Ponnaiyar Palar (b) Tributary - Kal Ar (c) State Tamil Nadu Tamil Nadu 3.3 State(s) / District(s) / Taluka (s) in which the following are located

(a) Reservoir Krishnagiri Reservoir (existing) State Tamil Nadu District Krishnagiri Taluka Krishnagiri (b) Head works Nedungal Anicut (existing) State Tamil Nadu District Krishnagiri Taluka Krishnagiri (c) Command Area Krishnagiri and Vellore districts of Tamil Nadu

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(i) Enroute command State Tamil Nadu District Krishnagiri Vellore Taluka s (i) Krishnagiri (i) Tirupattur (ii)Pochampalli - (ii) Tail end command in Palar basin (from out-fall regulator) State Tamil Nadu District Vellore Taluka Vaniyambadi 3.4 Villages near the Head works Peruhalli and Nedungal village s of Krishnagiri Taluka of Krishnagiri District

3.5 Location of Head works Nedungal Anicut (a) Longitude 78 0 16’ E (b) Latitude 12 0 22’ N (c) Lies in Earthquake Zone No. Seismic Zone -II 3. 6 Project area reference to: (a) Survey of India Topo -sheets 57 L (57 L/6, L/7 and L/10) (Degree sheets)

(b) Index Plan Plate No. 1.1 3.7 Access to the Project Name Distance (a) Airport Kempe Gowda 100 km International Airport, Bengaluru.

(b) Rail head Jolarpet junction in Vellore district, 5 km (Southern railways)

(c) Road head NH -7: Bengaluru - Salem 10 km

(d) River port - - (e) Sea port Chennai, Tamil Nadu About 260 km by Road

4 Interstate aspects of the No. The scheme is an intra -state link of project Tamil Nadu

(a) Catchment area of the basin Ponnaiyar basin 15679 km 2 Palar basin 17871 km 2

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(b) State -wise details of catchment Ponnaiyar basin Palar Basin area

Karnataka (i) 3545 km 2 (i) 2813 km 2 Andhra Pradesh (ii) 133 km 2 (ii) 5018 km 2 Tamil Nadu (iii)11961 km 2 (iii) 10040 km 2 U.T.of P udu cherry (iv) 40 km 2 Total 15679 km 2 17871 km 2 (c) Submergence due to Project Not applicable (Since existing Krishnagiri dam and Nedungal Anicut are planned as Head works)

(d) Committed Utilisation within the Irrigation (Mm 3) state

i. Upstream Projects (u/s of Krishnagiri dam)

- Projects completed 298 - Project under construction Nil - Future Projects 3 - Any other Nil Sub -total 301 ii. Downstream Projects (d/s of Krishnagiri dam)

Projects completed 313 Project under construction Nil Future Projects Nil Any other Nil Sub -total 313 (e) Proposed annual utilisation and Area (ha) Utilisation (Mm 3) Area Benefitted by the project

i Irrigation i Enroute stabilisation -Kharif 1216 10.508 -Rabi 551 5.341 - Perennial 133 1.366 Sub -total 1900 17.215

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ii Stabilisation of command in tail end of Canal in Palar basin

-Kharif 5089 35.283 -Rabi 2304 18.053 - Perennial 557 4.590 Sub -total 7950 57.926 iii Water Supply (enroute) - 3.882 Benefitting 1.52 lakh human population

iv Transmission losses 6.977 Total annual utilisation 9850 86 .000 (sum of i to iv)

5 Estimated life of the project 50 years (years)

6 Irrigation (ha.) By flood water (a) Culturable command area (CCA) 9850 (b) Annual Irrigation (i) Kharif 6305 (ii) Rabi 2855 (iii) Perennial 690 (iv) Gross irrigated area (GIA) 9850 (v) Intensity of CCA irrigation 100 (GIA) x 100%) CCA

(c) District(s) Benefitted (if the Districts Talukas district benefitted is predominantly tribal or drought 1.Krishnagiri 1. Krishnagiri 2. Pochampalli prone, it may be indicated against each district). 2.Vellore 1.Tirupattur 2. Vaniyambadi (drought-prone)

(d) Cost per hectare of gross area Rs. 6. 58 lakh irrigated

(e) Cost per 1000 cum of gross/live Not Applicable storage

(f) Cost per 1000 cum of water Rs.0. 754 lakh delivered at the (Canal head/outlet)

(g) Water utilisation 86 Mm 3

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7 Flood control Not Applicable 8 Water supply 8.1 Domestic (i) Names of villages served Enroute Villages situated along Right side of the Canal in Krishnagiri and Pochampalli talukas of Krishnagiri district and Tirupattur taluka of Vellore district

(ii) Size of population served 1.52 Lakh (iii) Quantum of water ma de available 3.882 (Mm 3)

(iv) Quantum of water per capita/day 70 (litre)

8.2 Industrial Nil 9 Project Performance Flood flow canal to divert flood water during monsoon period from the Krishnagiri reservoir for improving the groundwater recharge in drought prone areas and stabilisation of existing ayacut.

10 Hydrology 10.1 Catchments 10.1.1 Catchment area up to Nedungal Anicut site (km 2)

(a) Gross (upto Nedungal Anicut) 5694 (b) Intercepted (Between Krishnagiri 266 dam and Nedungal Anicut)

10.1.2 Catchment area classification according to mode of precipitation (km 2)

(a) Rain fed 5694 +266 (b) Snow fed Nil 10.2 Precipitation (mm) 10.2.1 Catch ment upto Krishnagiri dam Rainfall (weighted ‘mm’) site (Record:1901-2009) Monsoon

(a) Average 62 5 (b) Maximum 1152 (c) Minimum 314

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10.2.2 In the Vicinity of Command Area Districts Krishnagiri Vellore (a) Average annual 830 1023 (b) Kharif 706 748 (c) Rabi 124 275 (d) monthly mean Eto (varies from) 18.4 cm to 9.98 cm (e) Average annual ETo 168. 56 cm 10.3 Gross Annual yield calculated upto the Krishnagiri dam (Mm 3)

(a) Maximum 868 (b) Minimum 11 (c) Average 329 (d) Dependable at Annual Monsoon (i) 50 % 315 309 (ii) 75 % 200 196 (iii) 90 % 116 114 10.4 Climatic Data (Command) 10.4.1 Name of Station(s) and period Period of Record of record

(a) Dharmapuri 1961 to 1990 (b) Vellore 1961 to 1990 10.4.2 Data Maximum Minimum (a) IMD Observatory at Dharmapuri a) Air temperature ( oC) 37.1 17.2 b) Humidity (per cent) 78.0 31.0 c) Wind (km/hr) 10. 3 4.6 (b) IMD Observatory at Vellore a) Air temperature ( oC) 38.9 18.1 b) Humidity (per cent) 86.0 37.0 c) Wind (km/hr) 10.4 5.5 10.5 Seismic co -efficients Not Applicable 10.6 Utilisation within the State (Mm 3) 10.6.1 Water availability (State’s share in 493 Mm 3 at 75% dependability (at case of interstate river) Krishnagiri Dam site including regeneration as Import)

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10.6.2 Committed Utilisation upto Krishnagiri dam (Mm 3)

(a) Upstream Projects Major Medium Minor - Projects completed (i) Kalvarapalli - 27 - (ii) Krishnagiri - 57 - (iii) Nedungal Anicut (Excl. Barur) - 51 -

(iv) Sulagiri - - 2 (v) Others - - 161

- Projects under construction - - - - Future Projects - - - (i) Krishnagiri LBC - 3 - (b) Downstream Projects upto Tiurkkoilur

Projects completed Major Medium Minor (i) Inchampadi - 21 - (ii) Sathanur - 170 (iii) Tirukkoilur 122 - - - Project under construction - - - - Future Projects - - - 10.6.3 Proposed utilization by the Project As mentioned in 2.4 (e) above 11 Floods near the head works site 11.1 Historical Maximum Flood discharge (at Nedungal anicut) Headworks (m 3/sec) 3041 (on 11.11.1903)

11.2 Design flood (m 3/sec) Krishnagiri Dam (controlling structure) 4234 11.3 Proposed Diversion from the Anicut (Peak 68 discharge)(m 3/sec)

11.4 River flows (minimum observed) ( m3/sec ) 11 12 Reservoir Krishnagiri Dam 12.1 Water level (El -m) (a) Maximum Water Level (MWL) 484.630 (b) Full Reservoir Level (FRL) 483.110 (c) Minimum Draw Down Level (MDDL) (for 474.730 canal sluices)

(d) Dead Storage Level (DSL) 467.260 12.2 Free board (m) 1.520 12.3 Live storage (Mm 3) 47.184

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12.4 Capacity (Mm 3) at: (a) Maximum Water Level 68.20 (b) Full Reservoir Level 47.184 (c) Minimum Draw Down Level (for canal 1.993 Sluices)

12.5 Flood absorption capacity (Mm 3) (a) Below FRL (upto 481.56 m) 32.049 (b) Between FRL and MWL 21.016 12.6 Sedimentation (a) Average annual Sedimentation in -flow 14.55 (MT/km 2) at Gummanur site

(b) Encroachment of live storage (percent) 0.85 % per annum (c) New Zero elevation (El -m) 470.900 13 Submergence (i) Reservoir/Head works No new reservoir is planned (ii) Land affected (ha) 591 (Land acquisition for Construction of canal)

14 Head works 14.1. Dam Details Krishnagiri Dam (Existing) regulates flood spills

(a) Type of Dam Masonry -cum -Earth dam (b) Length of the dam (m) 990.60 Earth Dam 712.93 Masonry 277.67 (c) Maximum Height above G.L (m) 29.26 14.1.1 Spillway (Overflow section) Length (m) 97.52 m (total length of Vents) Full Pond level (El -m) 483.11 Maximum water level (El - m) 484.63 Maximum height of Spillway crest above 12.38 G.L(m)

Length of bay (m) 12.19 Crest level (El -m) +477.01 Number of gates 8 Type of gates Lift gates Size of gates (m) 12.19 x 6.10

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Maximum discharge capacity(m 3/s) 4061 14.1.2 River sluices Vents 3 Nos. 1.52 x 1.83 m Sill (m) +467.26 Discharge (cumec) 172.75 14.1.3 Canal Sluices (a) Left side Vents 1 No. 1.52 x 1.83 m Sill (m) +474.73 Discharge (cumec) 2.83 (b) Right side Vents 1 No.1.22 x 1.22 m Sill (m) +474.73 Discharge (cumec) 2.83 14.2 Head works Details Nedungal Anicut ( Existing) with proposed Head Regulator

14.2.1 Location with respect to dam if any 16 km D/s of Krishnagiri dam 14.2.2 Details of Anicut (a) Type of Anicut Concrete -cum -Masonry (b) Length (m) 278 (c) Full Pond level (m) +434.68 (d) Crest level (m) +434.71 (e) Out let Level (MDDL) at Nedungal Anicut (i) Proposed link canal (irrigation) +433.000 (ii) Existing Barur canal (irrigation) +433.160 (f) Max. flood discharge (m 3/sec) 3041 14.2.3 Older Sc ouring Sluices (at extreme left flank)

Vents (Nos.) 5 Size of Vents (m) 1.22 X 1.22 Type of shutters Screw gearing 14.2.4 New Scouring Sluices ( in the year 1938) at 27 m from extreme left flank

Vents (Nos) 4 (low level) Size of Vents (m) 2 vents of 1.83 X 2.13 and 2 vents of 1.83 X 1.98

Type of shutters Screw gearing

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14.3 Head Regulator (a) Total length (m) 21.50 (b) Length of Bay(m) 3.30 (c) Sill Level (El -m) + 433.00 (d) Number of gates 5 (e) Size of gate (m) 3.30 X 2.00 (f) Type of gates Fixed Wheel type Vertical lift type (g) Type of energy dissipation arrangements Launching Apron (Stone pitching) (h) Capacity (cumec) 68 15 Canal System 15.1 Main Canal Ponnaiyar (Nedungal) - Palar Link Canal

15.1.1 Purpose of Canal Irrigation 15.1.2 Type Flood -flow canal Flow/lift Flow Lined - Unlined Unlined Discharging capacity of the canal 68 Cumec 15.1.3 Design data (a)Length (km) 54.150 (b)Full supply level at head (El -m) 434.450 (c) Full supply level at tail (El -m) 419.676 (d) Bed width at head/tail (m) 25 (e) Side slope at head/tail 1.5 : 1 (f) Bed slope 1 : 4500 (g) Maximum discharge capacity 68 at head/tail (m 3/s)

(h) Total number of canal 62 Nos. Structures

(i) Total assumed head losses 14.774 across the structure (m) including bed slope

(j) Culturable Command 985 0 (Stabilisation) Area(ha)

(k) Annual irrigation (ha) 9850 (Stabilisation) (l) Intensity of irrigation 100 %

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15.1.4 Distribution System Project envisages stabilisation of existing command area by Ground water recharge.

16 Cropping Pattern Percentage area (CCA) Existing Proposed 16.1 Name of crop/season ha % ha % a Kharif i Paddy 394 4 3448 35 ii Ragi/Jowar/ Bajra 1379 14 591 6 iii Groundnut 1575 16 788 8 iv Cotton 1477 15 690 7 v Pulses 1280 13 591 6 vi Maize 197 2 197 2 b Rabi vii Paddy 591 6 1475 15 viii Ragi / Bajra /Maize 887 9 493 5 ix Groundnut 99 1 99 1 x Pulses 1478 15 788 8 c Perennial xi Sugarcane 493 5 690 7 Total 9850 100 9850 100 17 Power Not Applicable 18. Cost (Rs. lakhs) Unit -I Unit -II Unit -III Total 18.1 Cost of the Project 374.86 627 47 .8 7 1700.00 64822.73 18.2 Allocated cost Irrigation 64822.73 Water Supply Included in the Irrigation component Any other Nil 19. Benefits/Revenue Benefits Item Quantity ( MT ) Value (Rs. Lakh) Increased Food 64286 14000.21 Production due to irrigation

Total: Rs. 14 000.21 lakhs

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20. Benefit Cost Ratio BC Ratio and IRR Irrigation (a) BC Ratio 1.7 9 (b) Internal Rate of 13. 32 % Return (IRR)

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INDEX MAP INDEX

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