Hydrologists already rely on computer models to predict floods, droughts and groundwater levels, and AI is being added to those forecasting tools. Hydrologists still collect field data, judge which model fits a river or aquifer, and explain the risks to the people who must act on them.
The short answer: exposure is modest, but the BLS expects technology and budgets to hold growth down. The ILO's 2025 index rates geologists and geophysicists, the closest group, at minimal exposure with a score of 0.36. The US Bureau of Labor Statistics projects 1 percent growth for hydrologists from 2025 to 2035, slower than average, with about 400 openings a year. Projections are estimates, not guarantees.
How exposed hydrologists are
The International Labour Organization scores occupations' tasks from 0 (cannot be automated with generative AI) to 1 (could be done without a human operator), and groups them into gradients from 1 to 4, with 4 the most exposed; below them sit minimal exposure and not exposed (ILO Working Paper 140, 2025).
| Occupation (ISCO-08) | ILO category | Mean task score (0 to 1) |
|---|---|---|
| Geologists and Geophysicists | Minimal exposure | 0.36 |
The ILO scores groups of occupations, so this is the closest group for hydrologists, not a score for the job title itself.
What the BLS projects
| Occupation | Projected change 2025 to 2035 | Openings a year |
|---|---|---|
| Hydrologists | Grow 1% | About 400 |
The BLS says mining, construction, hydraulic fracturing and concern about flooding and droughts will create demand, but that budget constraints will limit hiring. It also says the development and use of integrated technology and review systems may limit the need for some hydrologists. It does not name AI specifically.
Where AI is helping
- Speeding up flood and drought forecasts.
- Filling gaps in sensor and gauge records.
- Processing satellite and remote sensing data.
- Drafting technical reports and summaries.
What stays with hydrologists
- Fieldwork: measuring streams and wells and checking equipment.
- Model judgment: deciding whether a forecast fits local conditions.
- Advising decisions: explaining risk to planners, regulators and the public.
- Checking AI help: forecasts and filled-in data can be wrong, which NIST calls confabulation (NIST AI 600-1). See checking AI output.
How the job is changing
Automated systems take over more routine data review, so fewer hydrologists may be needed for that part of the work. Strong modeling, data and field skills fit where the job is heading. This page is general information, not career advice.
See also will AI replace geoscientists?, will AI replace scientists? and will AI replace urban planners?
Pay and how to get in
The US Bureau of Labor Statistics puts the median annual pay for hydrologists at $96,600 in May 2025, against $50,980 for all workers. The typical education needed to enter is: bachelor's degree. See how this job compares in AI exposure by pay and AI exposure by education level.
Questions and answers
Will AI replace hydrologists?
Not on current evidence, though growth is slow. The closest ILO group has minimal exposure, and the BLS projects 1 percent growth from 2025 to 2035.
Does the BLS say technology will affect hydrologists?
Yes. It says integrated technology and review systems may limit the need for some hydrologists, though it does not name AI.
How many hydrologist openings are expected?
The BLS projects about 400 openings a year.
What hydrology work stays human?
Fieldwork, judging whether models fit local conditions, advising decision makers and checking automated forecasts.