Telangana – Mission Godavari Part 1


Godavari is South Central India’s Ganga, many residents in Telangana Godavari Basin actually call it Ganga. Very unfortunate that Independent India has grossly underutilized mother natures gifted Rivers Ganga in North India and Godavari in South Central India. Particularly in the State of Telangana the River flows, with barely any utilization.

Pranahita takes its Origin with Merger of Wardha and Wainganga at the Northern Most Part of Telangana State bordering Maharashtra and Godavari enters at Basar, it leaves Sriram Sagar at Pochampad. Only recently  Yellampally project is getting completed, after this for 460 KM till it reaches Dhavaleshwaram there is no Irrigation Project to impound the precious water or convert the Hydro Power Potential.

In this Post focusing on Potential Water Utilization Telangana Can target to Utilize through this approximately 400 KM stretch both from Pranahita side or Yellampally Side till Bhadrachalam when the River will enter Andhra Pradesh where Polavaram Project Back Water will reach.

 

  1. How Much Water is actually Available in River Godavari for Telangana to Plan its Projects Best answer One would have got from most of the people is about 1480 TMC, as the Godavari Water Tribunal Awarded to Both Andhra Pradesh & Telangana as Combined State and at best one may assume all of it flows through Telangana even discounting significant flow thru Sileru and Shabari. I decided to check what the actual water flow has been and found CWC (Central Water Commission) has Hydro Observation Stations all over India on Major Rivers and it publishes the data at India-WRIS (Water Resources Information Systems f India) In addition we have Exact Actual discharges of Andhra Pradesh and Telangana Recorded On-line in Reservoir Storage Monitoring System

CWC Hydrology Stations on Godavari Pranahita and Indravati

Thru this Godavari Delta System Actual Discharge of Water could be obtained. Extracted Data from Both above Sources for the Years 2007~ 2012 to take average of recent past rather than going too long into history or only one or two years that may skew the data.

 

To my pleasant surprise, Annual Average Water Flows in Godavari as per Hydro Observation Stations and the Godavari Delta Actual Water outflow from the Cotton Barrage and the Derived Value for Thanbidi Hatti are given in below

Godavari River Water Flows 2007-2012 Average from CWC Hydrology

*Thanbidi Hatti on Pranahita  is assumed as 75% measured at Tekra.

Surprisingly the revelation is 2,163 TMC water on average has past Bhadrachalam into Andhra Pradesh this means the opportunity for Telangana State for Both Irrigation and Hydro Power is Monumental. As regards availability of water in Pranahita Contrary to 350 TMC water availability at 140 Meter MSL as is reported, actual CWC measurements reveal Over 700 TMC water is flowing down from such a height which carries huge Hydro Power potential, and it carries the huge potential to covert the 400 KM into inland water way, which I will cover in subsequent post.

Having established Telangana definitely has far higher availability of Water flowing, even at 75% of the Average flow amounts to 1,622 TMC

 Dam / Barrage Potential Sites & Likely Water Usage.

Leveraged Google Earth that gives Good insight of the River Path, width and depth and its Basin altitudes, through the entire stretch tried to identify the locations based on following criteria

  • Bank to Bank Width is Shorter
  • Higher Depth for impounding water with Good Water Head for setting up Hydro power stations
  • Conservative in FRL to minimize the Submergence of fertile lands, larger inhabitant places, mineral deposit areas and forests Mission Godavari - Potential Dam Sites

Mission Godavari - Potential Dam Sites - On Google Earth

Following Sites are suggested for further detail study by the Government of Telangana

Thumbadihatti (140-150) : This current proposed site, height agreement with Maharashtra is pending, agree with CM KCR it’s better to settle the matter soon with Maharashtra and show flexibility to adjust the height and location to minimize submergence impact on Maharashtra side, at this location even if current 152 M FRL is agreed it’s unthinkable how 160 TMC can be diverted without provision for LIFT, better to add LIFT and reduce the Height and add Hydro Power Station to generate power from water that will be discharged.

Mukkidigudem (116-136) : About 55 KM down from this proposed site, its Gorge like site that can impound water and better Site to LIFT too, it’s close to the first LIFT point at 62 KM planned under Pranhita-Chevella Current Design, advantage of this location is most of the submergence will be in Telangana side and it will have added inflows from Padda Vagu in Adilabad district flowing from West to east joins, Pranahita ahead of this site.

Kaleshwaram Upper (100 – 120 M) : This is fabulous site from water availability with Pranhahita and Godavari Joining but higher height poses significant submergence to Maharashtra too hence has to settle for moderate height and install Hydro Power Station with Reversible Turbines and Have Kaleshwaram Lower Dam fairly close by

Kaleshwaram Lower (93 – 115 M) between these two dams Good valley with lessor submergence will form good Lower Reservoir for the Reversible Turbines between Upper and Lower Reservoir.  More on this power management aspect in next post.

Ichampally (80 – 100 M) a site where FRL 125 M massive dam was proposed to utilize 1000 TMC water could not take off, another fabulous location, however considering the forest area and mineral deposits around, see the conservative possibility of 100 M FRL and have the Piped discharge connect to Davadula LIFT system, where huge Power is consumed for lifting watering currently it seems to be sucking from 75 Meter to 90 Meter ! this entire Power can be saved. Further Pumping Remains as it is currently done, that seems to be pump not suction where there is no inefficiency by design.

Kanathanapally (70 to 85 M) This is high priority site for Telangana to start Irrigation Project, if higher is possible go for it as large section of area on both banks of Godavari is within the state of Telangana, very narrow stretch for a Good Dam (Mini Srisailam) this will give immediate productivity improvement to Devadula LIFT both for increased availability of water and reducing the power requirement and can have Good Hydro Power Station to Generate significant power during Godavari Surplus which would be for Over 100 days in a Year at this location as water from Pranhahita is joined by Huge inflow from Indravati.

Edhira (57 to 70 M) this is second priority location for Telangana to construct good Barrage to impound water within Telangana including the submergence and utilize water on both sides of the banks for Irrigation, Thermal Plants and Hydro Power with Significant water has to pass thru.

Parnasala (50 to 60 M) this needs more investigation

Dummugudem (45 to 50 M) this existing one may get submerged under Polavaram back water hence needs to construct higher Barrage to impound and provide some protection to Bhadrachalam, needs closer examination

 

With these Series of Dams and Barrages on Pranahita and Godavari

Telangana State should be able to Utilize 650 TMC of Water for Irrigation and Generate over 4000 MU most of which can be utilized for various LIFT pumps across these projects to take water into Over 200 to 400 Meter altitude Deccan plateau area in Telangana State

This analysis and suggestions are based on Central and State Government information made public and Google Earth information applying Basics of Hydrology and Hydro Power and conservatie and optimal care is taken however exact locations and heights some more on-site conditions will require examination and prioritization, intention is to bring out the facts to public and make government and people aware of potential approach and potential sites

Thank Namaste Telangana Daily for translating posting the concise version in Telugu today as below

Mission Godavari - Post in Namaste Telangana on 2015 May14

 

 

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