Occupation · SOC 19-2043.00
Research the distribution, circulation, and physical properties of underground and surface waters; and study the form and intensity of precipitation and its rate of infiltration into the soil, movement through the earth, and return to the ocean and atmosphere.
Also called: Groundwater Consultant · Hydrogeologist · Hydrologist · Research Hydrologist · Physical Scientist · Scientist · Source Water Protection Specialist · Hydraulic Engineer · Hydrologic Engineer · Isotope Hydrologist · Project Hydrogeologist · Seismologist
Job family: Life, Physical, and Social Science Occupations
A source-stamped Markdown brief of this occupation — paste it into an agent, or fetch
/roles/role-19-2043-00/context.md directly.
A fast read on where AI already shows up in this occupation, where it stays a copilot, where humans remain in the loop, and what the labor market is doing. Built from observed Claude.ai conversations mapped to O*NET tasks and from published research — measures of usage and exposure, not advice or predictions that the job is going away.
Task areas most often handled directively in observed AI conversations — candidates to delegate with light review.
Task areas where a human was still judged necessary in a large share of observed conversations — not a safety ruling, an observed-need signal.
The capabilities O*NET rates most important for this occupation — the human ground the work is built on.
See all skills →Independent published positions, read together — not a forecast.
67th-percentile task overlap — yet about 500 openings a year (-0.1% projected, BLS), and observed AI use leans 4165% copilot, not hand-off (AEI) . What exposure means →
What today's research says about this occupation's exposure to AI, how AI is actually being used in it, and where employment is headed. These are positions within published studies — measures of exposure and usage, not predictions that this job will disappear.
Each study uses its own scale, so the raw scores are not comparable across rows — the percentile (this job's rank among all U.S. occupations with data) is the comparable figure, and sizes the bars.
| Measure | Rank vs all occupations | Percentile | Score |
|---|---|---|---|
| Overall AI exposure (Felten et al.) Moderate | 63rd | 0.6 | |
| LLM task exposure, γ (OpenAI / Eloundou) High | 75th | 0.9 | |
| AI assistant applicability (Microsoft) Moderate | 62nd | 0.2 |
OpenAI's exposure study scores tasks three ways: with a language model alone (α 0.1), with simple added tooling (β 0.5), and including AI-powered software (γ 0.9). Higher means more of the job's tasks could be done at least twice as fast — not that they will be automated away.
Most of this job's tasks can be done remotely (Dingel–Neiman), which tends to track with higher digital and AI exposure.
A pre-LLM (2013) estimate of how automatable this job is by computerization and robotics. Shown for historical context only — it is not part of any current AI ranking.
Frey–Osborne probability 0.0 · 9th percentile among occupations · Low
Among measured AI assistant conversations mapped to this occupation (Anthropic Economic Index, 2026-01-15), these task types came up most. These are shares of observed AI conversations — not shares of the job, of worker time, or of what could be automated.
| Prepare written and oral reports describing research results, using illustrations, maps, appendices, and other information. | 11.1% | |
| Compile and evaluate hydrologic information to prepare navigational charts and maps and to predict atmospheric conditions. | 1.5% | |
| Review applications for site plans and permits and recommend approval, denial, modification, or further investigative action. | 1.0% | |
| Study public water supply issues, including flood and drought risks, water quality, wastewater, and impacts on wetland habitats. | 0.6% | |
| Study and document quantities, distribution, disposition, and development of underground and surface waters. | 0.6% |
Independent U.S. Bureau of Labor Statistics employment projection for 2024–2034 — a labor-market forecast, not an AI-impact forecast.
| Outlook | Declining · -0.1% by 2034 |
| Projected annual openings | 500 |
| Employment 2024 → 2034 | 6,300 → 6,300 |
“Annual openings” counts new jobs plus replacements for workers who leave the occupation, so it can be large even when growth is modest.
The ILO's 2025 global study scores generative-AI exposure on the international ISCO-08 occupation system, not US SOC. Bridged through the published (and approximate, many-to-many) IBS O*NET-SOC ↔ ISCO-08 crosswalk, this US occupation corresponds to the international occupation below. Exposure here means how much of the work's tasks today's AI can attempt — task overlap, not automation, adoption, or jobs lost.
| International occupation (ISCO-08) | Task exposure (2025) | Most tasks fall in |
|---|---|---|
| Geologists and geophysicists · 2114 | 36% | Minimal |
Read the whole six-band gradient on the GenAI exposure gradient page. The crosswalk is approximate: a US occupation can map to several international ones, and the ILO scores describe the international occupation, not this exact US role.
How people actually apply AI to this occupation's tasks, from Claude.ai (Free and Pro) conversations in the Anthropic Economic Index, 2026-01-15. This is one AI assistant's consumer sample — not all AI, not the whole workforce. Autonomy and the collaboration mix are model-rated estimates; figures below the sample floor are hidden.
| Augmentation vs. automation | 41.6% working with AI · 49.9% handed to AI |
| Most common way people use AI here | Directive · AI does it; you give the instruction |
| Typical AI autonomy | 3.5 / 5 · higher = AI acts more independently |
| Used for work (vs. personal / coursework) | 27.1% |
The role's most common tasks in AI conversations, each tagged with how people work with the AI on it. “Usage” is the share of observed conversations, not of the job.
| Task | How | Usage |
|---|---|---|
| Prepare written and oral reports describing research results, using illustrations, maps, appendices, and other information. | Directive | 3.3% |
| Review applications for site plans and permits and recommend approval, denial, modification, or further investigative action. | Directive | 0.5% |
Tasks where the model most often judged that a person remained necessary — a useful read on the current boundary, not a guarantee.
| Review applications for site plans and permits and recommend approval, denial, modification, or further investigative action. | 95.6% | |
| Prepare written and oral reports describing research results, using illustrations, maps, appendices, and other information. | 92.2% |
Example prompts phrased from the tasks people most often delegate to AI in this occupation (Anthropic Economic Index). Each shows the underlying measured task and its share of observed AI use. They are suggested phrasings of real tasks — starting points, not endorsed instructions.
Help me prepare written and oral reports describing research results, using illustrations, maps, appendices, and other information. From: Prepare written and oral reports describing research results, using illustrations, maps, appendices, and other information. · 3.3% of measured AI use · directive
Help me review applications for site plans and permits and recommend approval, denial, modification, or further investigative action. From: Review applications for site plans and permits and recommend approval, denial, modification, or further investigative action. · 0.5% of measured AI use · directive
All 25 tasks O*NET lists for this occupation, ordered by importance. Each links to its own page with AI-exposure and observed-use detail.
Newer responsibilities O*NET has flagged as growing for this occupation.
O*NET importance rating, from 1 (not important) to 5 (extremely important).
| Mathematics | 4.3 | |
| Physics | 4.1 | |
| Engineering and Technology | 4.0 | |
| English Language | 3.9 | |
| Geography | 3.9 | |
| Computers and Electronics | 3.5 | |
| Chemistry | 3.4 | |
| Biology | 3.2 |
| Critical Thinking | 4.0 | |
| Reading Comprehension | 3.9 | |
| Active Listening | 3.9 | |
| Science | 3.9 | |
| Speaking | 3.8 | |
| Mathematics | 3.8 | |
| Writing | 3.6 | |
| Active Learning | 3.6 | |
| Monitoring | 3.5 |
| Oral Comprehension | 4.0 | |
| Written Comprehension | 4.0 | |
| Oral Expression | 4.0 | |
| Written Expression | 4.0 | |
| Problem Sensitivity | 3.9 | |
| Deductive Reasoning | 3.9 | |
| Inductive Reasoning | 3.9 | |
| Mathematical Reasoning | 3.9 | |
| Category Flexibility | 3.8 | |
| Near Vision | 3.8 | |
| Information Ordering | 3.6 | |
| Flexibility of Closure | 3.6 | |
| Speech Recognition | 3.6 | |
| Fluency of Ideas | 3.5 | |
| Speech Clarity | 3.5 | |
| Originality | 3.3 | |
| Number Facility | 3.3 | |
| Perceptual Speed | 3.3 | |
| Far Vision | 3.1 |
| Complex Problem Solving | 3.8 | |
| Judgment and Decision Making | 3.5 | |
| Systems Analysis | 3.4 | |
| Coordination | 3.1 |
Skills employers ask for in job postings for this occupation (Lightcast), with whether each is a common or specialized skill.
Showing the top 40 of 154.
How characteristic each condition is of the job, on O*NET's 1–5 context scale (higher = more present in day-to-day work). Each condition links to how it varies across all occupations.
What to study: Multi/Interdisciplinary Studies , Physical Sciences . Fields of study crosswalked to this occupation (NCES CIP–SOC), not a requirement.
Share of people in this occupation at each level of education.
| Master's Degree | 52.2% | |
| Bachelor's Degree | 39.1% | |
| Post-Baccalaureate Certificate | 4.3% | |
| Post-Doctoral Training | 4.3% |
The interests and personal qualities O*NET associates with people who do this work.
| Investigative | 6.4 | |
| Realistic | 5.8 | |
| Conventional | 4.3 |
| Physical Science | 6.0 | |
| Mathematics/Statistics | 5.4 | |
| Nature/Outdoors | 5.0 | |
| Engineering | 3.9 | |
| Life Science | 2.9 | |
| Information Technology | 2.8 | |
| Mechanics/Electronics | 2.7 | |
| Management/Administration | 2.6 | |
| Public Speaking | 2.5 |
| Dependability | 5.0 | |
| Attention to Detail | 4.0 | |
| Integrity | 3.0 | |
| Intellectual Curiosity | 2.6 |
U.S. · annual wages (BLS OEWS)
| 10th percentile | $60,010 |
| 25th percentile | $73,330 |
| Median (50th) | $92,060 |
| 75th percentile | $114,940 |
| 90th percentile | $139,420 |
| People employed | 5,720 |
Where these workers are employed, by number of jobs (national, BLS OEWS). Pay shown is the occupation's national median, not industry-specific.
| Industry | Workers | National median pay |
|---|---|---|
| Professional, Scientific, and Technical Services · Sector | 1,670 | $96,170 |
| Engineering Services · National industry | 640 | $85,450 |
| Educational Services · Sector | 170 | $80,690 |
| Testing Laboratories and Services · National industry | 90 | $39,120 |
| Administrative and Support and Waste Management and Remediation Services · Sector | 90 | $111,750 |
| Other Services (except Public Administration) · Sector | 50 | $83,630 |
| Utilities · Sector | — | $165,480 |
Industries where this occupation is far more common than in the economy as a whole. The location quotient is how many times more concentrated it is here (a value of 5 means five times its economy-wide share).
| Industry | Concentration | Workers |
|---|---|---|
| Engineering Services · National industry | 14.92× | 640 |
| Professional, Scientific, and Technical Services · Sector | 4.18× | 1,670 |
| Educational Services · Sector | 0.34× | 170 |
Part of the Agriculture and Energy & Natural Resources career clusters.
Side-by-side comparisons place two occupations’ pay, preparation, skills, and AI exposure on the same page — same data, same scale, no forecast.
Options the data surfaces for Hydrologists — not advice or a forecast. Each is a real cross-link you can follow into the evidence.
Capabilities this work builds that are used across many other occupations.
Occupations O*NET rates as related — the nearby moves on the map.
How people typically prepare for this work.
On the global GenAI exposure gradient this work sits around the 68th percentile of 427 international occupations.
Hydrologists show 67th-percentile AI task overlap — and about 500 annual U.S. openings
Hydrologists show 67th-percentile AI task overlap — and about 500 annual U.S. openings • Hydrologists rank in the 67th percentile (High band) for AI task overlap across U.S. occupations — a measure of how much of the work today's AI can attempt, not how much is automated. (Eloundou et al. (GPTs are GPTs) + Felten AIOE) • The occupation is projected to see about 500 U.S. job openings per year (2024–34), counting growth and replacement — a labor-demand projection made independently of AI. (BLS Employment Projections 2024–34) • BLS projects employment to be declining (-0.1%) from 2024 to 2034. (BLS Employment Projections 2024–34) • Median annual pay is $92,060, across about 5,720 U.S. workers. (BLS OEWS (May 2024)) • Of the AI use actually observed for this work, 42% looks like augmentation (drafting, iterating, checking) rather than hands-off automation — from a Claude.ai usage sample, not a census. (2026-01-15-v4-plus-2025-03-27-v2) Source: Singulariki — "Hydrologists". https://singulariki.com/roles/role-19-2043-00 Note: AI task overlap measures what today's AI can attempt, not automation, job loss, or a forecast.
AssetsShare imageMethodology & sourcesPress & newsroomThe newsroom
Every line is built only from figures this page already shows and cites. AI task overlap means what today's AI can attempt — not automation, job loss, or a forecast.
Every figure above traces to a named public dataset and the exact release below — not hand-written opinion. See the full methodology for what each measure does and does not mean.
Data compiled June 2, 2026. Figures are estimates, not advice.
Singulariki. "Hydrologists." Singulariki: a source-backed encyclopedia of work. Built from O*NET 30.3; BLS Occupational Employment and Wage Statistics (OEWS) May 2024; BLS Employment Projections 2024–2034; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); Microsoft “Working with AI” working-with-ai; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130; AI Occupational Exposure (AIOE) Felten, Raj & Seamans; ILO / Gmyrek et al. GenAI exposure gradient 2025; IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022; Frey & Osborne (2013) frey-osborne-automation; Dingel & Neiman (2020) dingel-neiman-workathome. Accessed June 7, 2026. https://singulariki.com/roles/role-19-2043-00
Singulariki. (2026). Hydrologists. Singulariki: a source-backed encyclopedia of work. Retrieved June 7, 2026, from https://singulariki.com/roles/role-19-2043-00
@misc{singulariki-role-19-2043-00,
title = {Hydrologists},
author = {{Singulariki}},
year = {2026},
note = {O*NET 30.3; BLS Occupational Employment and Wage Statistics (OEWS) May 2024; BLS Employment Projections 2024–2034; Anthropic Economic Index v4 (2026-01-15) + v2 (2025-03-27); Microsoft “Working with AI” working-with-ai; “GPTs are GPTs” (Eloundou et al.) arXiv 2303.10130; AI Occupational Exposure (AIOE) Felten, Raj & Seamans; ILO / Gmyrek et al. GenAI exposure gradient 2025; IBS O*NET-SOC ↔ ISCO-08 occupation crosswalk 2022; Frey & Osborne (2013) frey-osborne-automation; Dingel & Neiman (2020) dingel-neiman-workathome. Accessed June 7, 2026},
url = {https://singulariki.com/roles/role-19-2043-00}
} Citations name the underlying public dataset releases — they reflect what this page is built from, not just the URL.