The department offers a program leading to the Master of Science (M.S. Thesis option) degree with a major in hydrology. The faculty offers competence in hydrogeology, hydrogeochemistry, hydrometeorology, hydroclimatology, environmental hydrology, ground-water hydrology, surface-water hydrology, vadose zone hydrology, mathematical and statistical methods in hydrology (including stochastic and numerical modeling), water resources systems, and water resources policy.The programs are designed for students with interests in the physical, chemical, and biological aspects of the hydrologic cycle, as well as water resources systems, environmental studies, or water policy and the social sciences related to water resources. Students may concentrate in one or a combination of these fields but should acquire some proficiency in all aspects of hydrology and water resources. Research-based M.S. study programs are individually planned to meet the student's special interests and professional objectives. More information about faculty research areas of expertise may be found at the department website, Research Focus Areas.M.S. Thesis option applicants need not have completed an undergraduate degree in hydrology and water resources; however, previous study in this field or a related field is beneficial. The programs have been designed to enable students who have completed fundamental undergraduate mathematics and science course work to enter directly.Time-to-completion for the Master of Science degree in Hydrology Non-Thesis Option is approximately 1 12 to 2 years (coursework and final report) for well-prepared students. A degree candidate must submit a 1-unit Master's Report. Both a professional report completed as a current work assignment or a graduate-level paper on a topic approved by the faculty advisor and Director of Graduate Studies-Hydrology are acceptable. Past reports, manuscripts, or documents completed prior to the beginning of the degree program may not be used to satisfy this requirement. A poster presentation at the department's annual student research symposium, El Día del Agua y la Atmósfera, satisfies this requirement. By definition, the Non-Thesis Option is not research-based and may be suitable for working professionals who wish to focus more on applied hydrology and water resources.