The route crosses no major watercourses, although creeks adjacent to or spanned by the route drain into the Pazinčica and Boljunčica rivers, or directly into the Adriatic Sea in the case of watercourses flowing down Učka's eastern slopes.
In predominantly agricultural/pastoral catchments, widespread bacterial contamination of streams occurred due to increased livestock use of watercourses and decreased dilution during low flows.
However, the rapid development of Cabomba plants in water reservoirs can negatively affect the water flow in hydroelectric turbines and irrigation channels and can reduce the navigability of watercourses.
Catchment interventions such as fencing of watercourses, streamside buffer strips and constructed wetlands have the potential to reduce faecal pollution of watercourses.
Human interventions in the water cycle (drainage of landscape, amelioration of watercourses, pollution of water, etc).
From the perspective of the amount of flow within the water system, vegetation would be a negative element, although from the perspective of water quality, vegetation would still play an important role as a buffer against the contamination and sedimentation of watercourses.
Improvements are also documented regionally, such as successful support of farmland species, and improved condition of watercourses and landscapes.
The abundance of Dolichopodidae in Italy and Empididae in Germany were furthermore enhanced by the proximity of watercourses.
The A5 motorway runs through plains crossed by a number of watercourses and railways running perpendicular to the motorway route, requiring a variety of bridges and viaducts.
The plant is frequently seen occupying open waste spaces, banks of watercourses, grasslands, roadsides, and pathways [ 6, 7].
