Hydrogeologist: Job description

Hydrogeologists study the distribution, flow and quality of water underground (as opposed to hydrologists who are primarily concerned with surface water). This involves:

• interpreting technical data and information from maps and historical documents to build a conceptual model of groundwater flow and quality;
• designing and completing an investigation (which may include environmental measurement and sampling or an ongoing monitoring regime) in order to confirm or develop the model;
• using modelling techniques to enable predictions to be made about future trends and impacts on groundwater flow and quality.

The work of a hydrogeologist ultimately leads to better management of natural resources or better protection of the groundwater.

Typical work activities

The work of a hydrogeologist can vary considerably according to the sector, employer and area of specialism, but general work activities may include:

• applying a knowledge of fundamental geology to develop an understanding of how the rock types and structure in an area impact on groundwater occurrence and movement;
• understanding and interpreting maps, geographical data, historical evidence and models to build up a picture of the groundwater regime and/or land contamination, often based on incomplete information;
• using computers to model groundwater flow, chemistry and temperature according to geological formations, surface water flow and man-made influence;
• undertaking field work and site visits for investigative and monitoring purposes;
• designing and commissioning boreholes, and sampling and measuring groundwater and surface water;
• undertaking environment impact assessments of groundwater abstraction and management activities;
• analysing collected information to assess and/or predict the impact of activities such as landfills, construction developments, mining or agriculture on groundwater quality and resource availability;
• liaising with other hydrogeologists, hydrologists, ecologists, engineers and other professionals in related fields;
• ensuring compliance with environmental legislation and keeping up to date with technological and legislative developments;
• writing reports for clients, which can be understood by people who don’t necessarily have a technical background;
• answering technical queries and providing advice to clients and the public in writing and over the telephone;
• managing projects and contractors;
• working within health and safety guidelines.

Hydrogeologists working for charities and non-governmental organisations (NGOs) overseas may be involved in:

• finding new water supplies for remote villages or refugee camps;
• siting new wells;
• testing water quality;
• protecting water supplies from pollution;
• decontaminating wells.