Absolutely. Problem 1: Connecting hydrology with physics such as an issue related to hydraulics. Problem 2: Connecting hydrology with chemistry and its example would be analysis of chemical parameters of an aquifer in relation to water chemistry. Problem 3: Connecting hydrology with environmental studies and this may include issue related to past, present and/or futuristic impact on the environment in relation to ongoing hydrological scenario and also environmental sources behind the current hydrological set up of an area. So, it totally depends on exactly what your research topic is pertaining to hydrology.
It will be better to connect hydrology with science parameters: physical, chemical, biological, environmental, geological, climatological, astronomical, etc.