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Curriculum Vitae
Personal Details Dr John Devadas. Dakey
Pan Number: AIBPD2333G Door No. 19-02-02/6, (3rd Floor, S1)
Passport Number: G3295575 Pravallika Heights, Veerabhadra Puram,
Date of Issue : 13-08-2007 Rajahmundry, East Godavari District,
Date of Expire: 13-08-2017 Andhra Pradesh, India, 533105
Date of Birth: 13-08-1969 Mobile: +919650085126, +918801207070
Fathers Name: Raja Rao. D e-mail: drjohndevadas@yahoo.co.in
Sex : Male http://www.linkedin.com/pub/dr-john-devadas-
dakey/b/73/8b9
Marital Status : Married Skype ID: drjohndevadas@yahoo.co.in
Dr Devadas has received his Bachelor, Master, post Masters and Doctoral Degree in geology /Hydrogeology from Andhra
University. He has 15 years of work experience as a professional geologist/hydro-geologist in India and Singapore. He has
more than 30 leading national and international technical papers, presentation, and conference proceedings related to
Geology/hydrogeology, to his credit.
Educational Qualifications
University Degree Year
Andhra University, A. P. Ph. D In Geology 1999
Andhra University, A. P. Post M. Sc (Tech) In Hydrogeology 1995
Andhra University, A. P. M. Sc. In Geology 1993
Andhra University, A. P. B. Sc. In Geology, Physics and Chemistry 1991
Membership of Professional Organizations
 Life member of Association of Hydrologists of India, Visakhapatnam.
 Member of Centre for hydrology and groundwater Resources, Andhra University, Visakhapatnam.
 Member for conducting groundwater surveys from Groundwater Department, Govt of Andhra Pradesh,
Hyderabad.
Employment History & Project Experience
CH2MHILL (India) Pvt Ltd, Noida. As
for Senior Hydrogeologist
(Independent Consultant)
from Sep 2013 to Till Date
► Sustainable Integrated Water Resource Management (IWRM) plan and
Preparation of Detailed Project Report of Alternative Water Source for Manesar
– Bawal Investment Region (MBIR) for Delhi Mumbai Industrial Corridor
Development Corporation Limited (DMICDC), New Delhi.
► Sustainable Integrated Water Resource Management (IWRM) plan and
Preparation of Detailed Project Report of Alternative Water Source for
Khuskhera – Bhiwadi – Neemrana Investment Region (KBNIR) in Rajasthan for
Delhi Mumbai Industrial Corridor Development Corporation Limited
(DMICDC), New Delhi.
Golder Associates Consulting India Pvt
Ltd, Gurgaon.
As Senior Hydrogeologist/Engineering
Geologist
from June 2011 to July 2013
► Undertake third-party field validation of modeling parameters (probabilistic
model developed before to assess water replenishment to groundwater) related to
Artificial Aquifer Recharge (AAR) structures including Rain Water Harvesting
(RWH) structures in India for Coca-Cola, Atlanta, United States.
► Undertake source water vulnerability analysis for bottling plant (beverage
industry) in terms of water source, water quantity, environment, community, and
social aspects. Simultaneously, reporting vulnerabilities and developing a plan
containing specific, pragmatic measures to manage water supply vulnerabilities
pertaining to business continuity for Coca-Cola Company, India, Source
Vulnerability Assessment (SVA) and Source Water Protection Plan (SWPP) for

10 different franchisee bottling plants in Uttar Pradesh, Himachal Pradesh,
Punjab, and Haryana States.
► Responsible for technical leadership related to mining services in coal, iron
ore and other metals. Areas of work include strata control for underground
mining, slope stability in opencast mine pits and overburden dumps, and rock
behavior in hydro-power projects.
► Responsible for observation of pilling works, shaft excavation including
changes in strata, boulders, caving and log soil cuttings, test shaft excavation and
construction, verification of geotechnical design parameters with actual site
condition CSL logging and evaluate the CLS results, and O-cell load testing (Pile
load test and Integrity testing), shaft remedial measures and observation logs
review of dewatering system at the site at Super nova, Sector 94, Greater Noida,
India. It is one of the largest and tallest in this region.
Tritech Engineering & Testing
(Singapore) Pte, Ltd, Singapore.
As Senior Hydrogeologist/Engineering
Geologist
from Dec 2009 to June2011
► Project D 2008-00667-010: Site characterization of a site at Mandai,
Hydrogeological Assessment for Defense Science and Technology Agency.
(DSTA, Singapore)
► Contract 9131D Detailed Site Investigation Works for Downtown Line 3
(Section 1): Pumping Test for Land Transport Authority (LTA, Singapore)
Soil Investigation Pte Ltd, Singapore,
As Senior Geologist / Hydrologist
from November 2008 to November
2009
►Geotechnical Engineering works at MBFC Project: supervising the Bore
Pilling and Jet Grouting works.
►MBS IR Project: Supervising in soil investigation works, field, in situ tests,
instrument installations, monitoring works, and compilation of final reports.
► Project manager C487 Marina Coastal Expressway Project Phase-I: Jet Grout
Coring, Laboratory Tests on Jet Grout Samples and Report Preparation
► Project D/004/09 SO REP’S for Off-shore Soil Investigation off Marina East:
80 Cone Penetration Tests, 15 Boreholes, 5 large diameter Boreholes to
determine subsurface Stratigraphy, estimate Geotechnical parameters, and
provide results for Geotechnical design for Housing & Development Board,
Singapore.
International Ground Water
Technologies Pte. Ltd, Singapore.
As Senior Geologist / Hydrologist
from June 2008 to October 2008
► LTA CCL3 Project: Contract 855 Cornwall Garden (WSA JV), management
in soil drilling, soil testing, instrument installation and monitoring, installation of
dewatering wells, monitoring and pumping test for Land Transport Authority,
Singapore.
Post Doctorial Research Project Experience
Department of Geology, Andhra
University, India
As a Principal Investigator
(DST Fast Track Young Scientist
Schemes)
from June 2002 to June 2008
► Ground Water Resources Development & Management in a Backward
District of Srikakulam of Andhra Pradesh, India, sponsored by D.S.T.
(Department of Science and Technology), New Delhi. (Ref. No: S.R./FTP/ES-
64/2006)
► Assessment & Management of Potential Recharge zones in Aquifers in the
context of conjunctive use of Water in Sarada River Basin of Visakhapatnam
District of Andhra Pradesh, India, sponsored by D.S.T. (Department of Science
and Technology), and New Delhi. (Ref. No: S.R./FTP/ES-06/2002)
University, India
As a Post-Doctoral Research Fellow
from January 1999 to January 2002
► Assessment & Management of Ground Water Resources in parts of crystalline
terrain of Guntur District, Andhra Pradesh, India, sponsored by D.S.T.
(Department of Science and Technology), New Delhi. (Ref. No: ESS/72/023/98)
Research Experience
University, India
As a Research Scholar
from Jan 1996
to
June 1999
► Awarded Doctor of Philosophy on "Occurrence and Geochemistry of
Fluoride in Ground waters of a Typical Drought Prone Area of Andhra
Pradesh, India" in1999 from Andhra University, Visakhapatnam, India.

Career Highlights
 Hydro Geological Studies, Exploration Operations and Analysis
 ASR and deep well brine injection
 Rain Water Harvesting and Artificial Recharge
 Monitoring and Remediation of groundwater
 Environmental Management and Environmental Impact Assessments,
 Groundwater Resource protection plans, testing techniques/ fault analysis
 Surface and sub-surface Geophysics
 Environmental Audits
 Occupational Health and Safety Audits
International Journals – 5
1. Hydrogeochemistry of the Sarada river basin, Visakhapatnam district, Andhra Pradesh, India,
D. John Devadas, N. Subba Rao, B. Thirupathi Rao, K.V. S. Rao and A. Subrhamanayam, Environmental Geology, 52,
1331-1342, 2006.
2. Interpretation of Groundwater Quality Using Principal Component Analysis from Anantapur District, Andhra Pradesh,
India.
N. Subba Rao, D. John Devadas and K.V. Srinivasa Rao,
Environmental Geosciences, 13(4), 1-21, 2006.
3. Fluoride Incidence in Groundwater in an Area of Peninsular India,
N. Subba Rao and D. John Devadas,
Environmental Geology, 45, 243-251, 2003.
4. Multivariate Analysis for Identifying the Governing Factors of Groundwater Quality,
N. Subba Rao, J. Prakasa Rao, D. John Devadas, K.V. Srinivasa Rao, and C. Krishna,
Journal of Environmental Hydrology, 9 (16), 1-9, 2001.
5. Variation of Fluoride in Ground waters of Crystalline Terrain
N. Subba Rao, G. Krishna Rao and D. John Devadas
Journal of Environmental Hydrology, 6(3), 1-5, 1998.
National Journals – 11
1. Quality of Groundwater in the Coastal Area of Visakhapatnam-Bhimunipatnam, Andhra pradesh, India.
N. Subba Rao, K.V. Srinivasa Rao, D. John Devadas, D. Deva Verma, B. Thirupathi Rao,
A .Subrahmanyam, K. Arjunudu, M. J. Ratnakanth Babu, and T. Venkatakrishna
Indian Journal of Geochemistry, 22 (2), 193-208, 2007
2. Temporal changes in groundwater quality in an industrial area of Andhra Pradesh, India.
K.V. Srinivasa Rao, N. Subba Rao, B. Murali Krishna, P. Srinivasa Rao, A. Subrahmanyam, D. John Devadas and B.
Thirupathi Rao.
Current Science, 93 (11), 1616-1619, 2007
3. Hydrogeo-morphological Studies for the Location of Groundwater Potential Zones in the Sarada River Basin,
Visakhapatnam District, Andhra Pradesh, India.
D. John Devadas, N. Subba Rao, B. Thirupathi Rao, K.V. Srinivasa Rao and A. Subrahmanyam,
Gondwana Geological Magz, 21(1), 59-64, 2006.
4. Drainage Characteristics of the Sarada River Basin, Andhra Pradesh for watershed Management.
D. John Devadas, N. Subba Rao, B. Thirupathi Rao, K.V. S. Rao and A. Subrahmanyam, Journal of Indian Academy of
Geosciences, 49 (1), 1-6, 2006.
5. Identification of Factors Controlling the Surface Water Quality Using Principal Component Analysis.
N. Subba Rao, D. John Devadas and I. Bangaru Raju
Journal of Applied Geochemistry, 8(2), 154-161, 2006.
6. Quality Criteria for Groundwater Use for Development of an Area.
N. Subba Rao and D. John Devadas,
Journal of Applied Geochemistry, 7(1), 9-23, 2005.

7. Evaluation of Groundwater Quality in a Rural Area-A case study from Andhra Pradesh, India.
N. Subba Rao and D. John Devadas, B. Thirupathi Rao, K.V. S. Rao and A. Subrahmanyam,
Environmental Geochemistry, 7(1), 27-32,2004.
8. Effects of Chemical Properties of Groundwater on Water Supply Systems and Domestic Uses: A Case Study from
Sagarnagar, Visakhapatnam, India.
N. Subba Rao, P. Niranjan Babu, D. John Devadas and C. Krishna
Environmental Geochemistry, 5 (1 & 2), 9-12, 2002.
9. Hydrogeochemistry and Groundwater Quality in a Developing Urban Environment of a Semi-arid Region, Guntur,
Andhra Pradesh.
N. Subba Rao, J. P. Rao, D. John Devadas, K. V. S. Rao, C. Krishna and B. N. Rao
Journal of Geological Society of India, 59(2), 159-166, 2002.
10. Environmental Control of Groundwater Quality in a Tribal Region of Andhra Pradesh.,
N. Subba Rao, G. S. Rao, S. V. Rao, P. M. Reddy and D. John Devadas.
Indian Journal of Geology, 71(4), 299-304, 1999.
11. A Preliminary Report on Fluoride Content in Groundwater’s of Guntur Area, Andhra Pradesh, India.
N. Subba Rao, J. P. Rao, B. N. Rao, P. Niranjan Babu, P. M. Reddy and D. John Devadas,
Current Science, 75(9), 887-888, 1998.
References
Prof. N.SUBBA RAO Email: srnandipati@rediffmail.com
Department of Geology Phone: 0981-2844716(O) 0891-2704511(R)
Andhra University, Visakhapatnam Cell:+91 9848486967
Andhra Pradesh , India – 530003
Prof. M.JAGANNADHA RAO Email: mjrao_isa@yahoo.co.in
Andhra University, Visakhapatnam Cell: +919849798978
Prof. T. CHANDRA RAO Email: meripechrao@yahoo.co.in
Andhra University, Visakhapatnam Cell: 00919949176238

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