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PCM streamEntrance: JEE MainPhysical sciences & maths

Hydrologist

Hydrologists study how water moves through rivers, rain, soil and underground aquifers, to manage floods, droughts and water supply.

Class 11–12 subjectsPhysics, Chemistry, Maths

Entrance / admissionJEE Main / TNEA

DegreeB.E. Civil / B.Sc Geology + M.Tech / M.Sc Hydrology

Duration5–6 years

Your route, step by step

1Class 11–12: take PCMPhysics (fluids) and Maths are the base; Geography helps with understanding rivers and rainfall.
2Choose a degreeB.E. Civil (via JEE / TNEA) or B.Sc Geology / Physics.
3SpecialiseM.Tech / M.Sc in hydrology, water resources or hydrogeology.
4Work or researchGovernment posts, consultancy or PhD.

What a hydrologist does

Measure rainfall, river flow and groundwater
Build models of floods and water availability
Map aquifers and recharge
Advise on water policy and planning

Entrance exams & admission

JEE MainNITs, IIITs and many colleges
TNEATamil Nadu engineering seats, on Class 12 marks
CUET UGB.Sc at central universities

Where you may work

Central Ground Water Board, Central Water Commission, state water departments, National Institute of Hydrology, consultancies and NGOs.

Well-known colleges in and near Tamil Nadu

College of Engineering Guindy (Anna University)
IIT Madras

Official links

Official bodyCentral Ground Water Board (opens in a new tab)cgwb.gov.in
Official bodyCentral Water Commission (opens in a new tab)cwc.gov.in
Official bodyNational Institute of Hydrology, Roorkee (opens in a new tab)nihroorkee.gov.in
Exam / admissionTNEA — Tamil Nadu Engineering Admissions (opens in a new tab)tneaonline.org

Links checked: Oct 2026. Always confirm dates and rules on the official site.

Outlook

Water stress and floods make hydrologists important for cities and farms alike.

Specialise later

Surface water
Groundwater
Flood forecasting
Water quality
Climate & water