|Confined river at Plattekill Creek
SubSystem: Natural Streams
State Rarity Rank:
Global Rarity Rank:
Did you know?
Common features of confined rivers include plunge pools, flumes, chutes, cascades, alluvial fans, and mussel beds. The predominant source of energy is generated in the stream. These streams have high water clarity, are well oxygenated, and typically have cool water.
|State Ranking Justification||
There are probably several hundred occurrences statewide. Many documented occurrences have good viability and are protected on public land or private conservation land. This community has statewide distribution, and includes several high quality examples. The current trend of this community is probably stable for occurrences on public land, or declining slightly elsewhere due to moderate threats related to development pressure or alteration to the natural hydrology.
The number and miles of confined rivers in New York have probably remained stable in recent decades as a result of water quality regulations. Several examples have shown improvement in water quality in recent decades attributed to improved treatment of municipal and industrial waste (Bode et al. 1993).
The number and miles of confined rivers in New York are probably comparable to historical numbers, but the water quality of several of these rivers has likely declined significantly prior to the enforcement of water quality regulations (New York State Department of Environmental Conservation, Division of Water 2000).