Polavaram project

Brief description about this project

1. VISVODAYA ENGINEERING COLLEGE A TECHNICAL SEMINAR ON POLAVARAM PROJECT BY P.HARISH 154N1A01A4

2. INTRODUCTION Polavaram is a multi-purpose project irrigation project which is under construction and located on river Godavari near Ramayyapet village of polavaram Mandal of West Godavari district in Andhra Pradesh This project is a dream for the people of Andhra Pradesh The project will be a one-stop solution for all the water needs of the state.

3. COMPONENTS OF THE PROJECT HEAD WORKS Spillway with radial gates Earth cum rock fill dam (ECRF) Coffer dams Hydro electric power house MAIN CANALS 1.Right main canal 2.Left main canal 3. Distributary systems

4. 1.SPILLWAY Constructing the Spillway is the first step in the process. After constructing the Spillway,  48 huge radial Spillway gates  will be fitted to it. After the gates are fitted, then the Approach and Spill channels will be constructed to channelise river water through Spillway.

5. 2.COFFER DAMS Two Coffer Dams, a t upstream and down stream will be built across the river . The main purpose of the Coffer Dams is to protect the Earth Cum Rock field Dam (ECRF Dam) from floods during construction. CofferDam Dimensions : Coffer Dam U/S: Height 41m; Length 2.3 km; Width 145m;  600m  from the ECRF Dam. Coffer Dam D/S: Length 1.45 km CofferDam U/S can hold up to  120 TMCs  of water . The state government is planning to supply water to Polavaram Right and Left Main Canals by gravity

6. 3.EARTH CUM ROCK FILL DAM The ECRF dam will be built between the two Coffer dams. ECRF dam is the most crucial component of the entire project, constructed across the river Godavari and plays a major role in holding river wate r It can withstand up to 50 lakh Cusecs water flow, whereas peak flow of Godavari river recorded till now is 30 Lakh Cusecs.  ECRF is being built by Mega Engineering Company ECRF dam dimensions: Length 1750 mts  ; Height 41 ; Width 300 mts at the bottom and 30 mts in the top

7. Diaphragm Wall: Diaphragm wall is the foundation of ECRF dam . It is constructed below the ECRF dam and prevents leakage of water across the dam from the bottom of ECRF through sand pores . Without Diaphragm wall the ECRF will not sustain and will l e a d s to water leakage from the bottom of it.

8. BENEFITS OF THE PROJECT I t is i mmense advantage to Krishna Delta region b y s u p p l y ing 8 T M C o f w a t e r It is b oon to Rayalaseema region , t he Krishna river water meant for the state of Andhra Pradesh is currently being shared by Rayalaseema and Krishna Delta regions. But with 80 TMCs of Godavari water being diverted for Krishna Delta region, the entire Krishna river water meant for AP will be utilised for Rayalaseema region.

9. I t is b eneficial to North Andhra districts b y s u p p lying w a t e r t h r o ugh l e f t m a i n cana l f o r t h e i n d u s t r ial , d r i n kin g a n d i r r i g a tion purpose The hydroelectric power project will enable 960 Mega Watt power generation, which would be very crucial for the new state

10. C O N C L U SION The much-await i n g Polavaram project is running behind the targets but the works have been accelerated a lot in the past 3 y e a r s . As of now only 6 5 % of the entire project has been completed. The entire state is looking forward to the completion of the lifeline project and eager to reap the benefits of it H o p e t h a t Government w i l l c o m p l ete i t soo n .

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