Earthquake occurrence in different plate tectonic settings: There are three main plate tectonic environments: extensional, transform, and compressional. Plate boundaries in different localities are subject to different inter-plate stresses, producing these three types of earthquakes. Each type has its own special hazards.
Hydrology, therefore, is a broad science that utilizes information from a wide range of other sciences and integrates them to quantify the movement of water. The fundamental tools of hydrology are based in supporting scientific techniques that originated in mathematics, physics, engineering, chemistry, geology, and biology.
Hydrotherapy is the use of water to provide therapeutic effects. This is quite a wide ranging topic and can include treatments such as steam rooms and clonic hydrotherapy, but in this case we are referring to the use of water (in a hydrotherapy pool) to help with musculoskeletal and neural rehabilitation, as often used in physical therapy.