Drwinka is a

river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of w ...

, the right bank

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drai ...

of the

Vistula The Vistula (; pl, Wisła, ) is the longest river in Poland and the ninth-longest river in Europe, at in length. The drainage basin, reaching into three other nations, covers , of which is in Poland. The Vistula rises at Barania Góra in ...

with a length of 31.05 km (19 mi). Drwinka flows in the

Wieliczka Wieliczka (German: ''Groß Salze'', Latin: ''Magnum Sal'') is a historic town in southern Poland, situated within the Kraków metropolitan area in Lesser Poland Voivodeship since 1999. The town was initially founded in 1290 by Premislaus II of ...

and

Bochnia Bochnia (german: Salzberg) is a town on the river Raba in southern Poland. The town lies approximately halfway between Tarnów (east) and the regional capital Kraków (west). Bochnia is most noted for its salt mine, the oldest functioning i ...

Counties of Lesser Poland Voivodeship from sources near

Niepołomice Niepołomice (pronounced ; ) is a town in southern Poland, within the Lesser Poland Voivodeship (since 1999). It is situated on the Vistula River, on the verge of the large virgin Niepołomice Forest. There is a 14th-century hunting castle ...

to the mouth in Świniary, 133.5 km (83 km) into the Vistula River. Among its tributaries are streams and ditches from Niepołomice Forest, Wilczy Forest and from near Gawłówek. The southeastern part of its

catchment basin A drainage basin is an area of land where all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, the ...

is situated in the sandy area of the Vistula valley, filled mainly with quaternary river sediments covered with loess and

sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...

s of a dozen or so feet. Here the river passes through the Niepołomice Forest, dividing it into two different

flora Flora is all the plant life present in a particular region or time, generally the naturally occurring (indigenous (ecology), indigenous) native plant, native plants. Sometimes bacteria and fungi are also referred to as flora, as in the terms '' ...

complexes. The overall quality assessment of the Drwinka river waters at its estuary in physico-chemical, hydrobiological and bacteriological terms corresponds to Class I or Class II standards. Water in Drwinka does not show signs of

eutrophication Eutrophication is the process by which an entire body of water, or parts of it, becomes progressively enriched with minerals and nutrients, particularly nitrogen and phosphorus. It has also been defined as "nutrient-induced increase in phytopla ...

References

Rivers of Poland Rivers of Lesser Poland Voivodeship {{Poland-river-stub

See also

References