The presented bachelor thesis describes specifically selected water reservoir Branovo which is part of the Lovčianský brook with connected agricultural and forest surroundings as a part of the river basin (course of the river Old Žitava). Final resulst displays interaction between the existence and function of the water reservoir and the corresponding tributaries to the surrounding fauna - both earthbound and aquatic in terms of its environmental impact and conditions of survival. In detailed are analzyed environmental impacts and consequences of agricultural work on the water reservoir and its nearby surroundings. There are also monitored impacts of management in according to the relevant protection legislation and to the laws based on specific photographic documentation. As a reference samples has been used records of heavy metal content in the muscle fish in the examine area research work, where were used as comparative samples data from the fishbreeding and bonitation of the hunting district Branovo. Impacts of agriculture are from the autopsy from ancillary works.