Barrier tanks

Fish stock losses, which occurred as a result of excessive contamination of watercourses is to some extent compensated by the construction of reservoirs. Especially thanks to the extremely widespread and more and more perfect construction of dam reservoirs, mainly motivated by the needs of water management: the need to accumulate a sufficient amount of water for economic purposes, …

Drainage channels

Drainage channels

Drainage channels (drainage and irrigation), they are not stagnant waters in the literal sense, because their interconnections form a kind of network, resembling a river network. However, they are not exposed to contamination. They differ significantly from flowing waters, dlatego też rozpatrywać

Post-gravel workings

Post-gravel workings

Reservoirs belong to this group of stagnant waters, which arose, usually in flat terrain, after selecting gravel or other aggregate. A characteristic feature of the gravel pit is this, that only groundwater fills them. Charakter żwirowni z gospodarczego punktu widzenia jest

Old man

Oxbow lakes may arise artificially as a result of the regulation of meandering watercourses, they can also arise naturally. They are part of the original watercourse, insulated from the main bearing by the dikes, therefore only groundwater fills them (with the mother river they form "connected vessels”).

W pierwszych latach po powstaniu ich

Still waters

Still waters

The currently widespread tendency to shift the interests of fish management from flowing waters to standing waters is partly a necessity - it allows to eliminate the risk of ecological failure, which running water is always at risk, częściowo wynika także z potrzeby racjonalnej eksploatacji wszystkich

The land of bream

The land of bream

The lower parts of the lowland rivers correspond to the determinants of the bream land. The waters of this range are calm, they have a very mules fall (do 1-2‰), they are spacious and deep. With a slight decrease and a significant application of ambient mud, the bottom is usually soft, muliste. …

The country is fast

The country is fast

The land of barbel begins to form in the waters of the rivers on the border of the submontane and lowland zones. The watercourse is still characterized by a constant diversity and rich relief of the bearing. Vigorous parts alternate with mid-river pits, powstają w ten sposób dobre warunki

Lipina country

Lipina country

Along with the transition from the mountainous to the sub-mountainous areas, the trout rapids are slowly becoming rivers more abundant in water. Their current gradually calms down, rocky sections are replaced by more cohesive parties, with a moderate wide current. Lekko podnosi się