f150954c__S__Bureau_of_Labor_Statistics__Job_Duties
[Occupation] Hydrologists [ENTRY-LEVEL EDUCATION] Master’s degree [2012 MEDIAN PAY] $75,530 [Job Duties] 
Hydrologists study how water moves across and through the Earth’s crust. They can use their expertise to solve problems in the areas of water quality or availability.
Environmental Science and Protection Technicians : Occupational Outlook Handbook : U.S. Bureau of Labor Statistics