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Semi-open or closed watercourse, medium gradient

Type 9

Salinity: <1 g/L
Altitude: <100 m
Width of the watercourse (bottom width):  >15 m
Current: Usually medium to fast

Description

The watercourse has an average gradient, with coarse grain size, with the presence of numerous boulders. The water is fresh, generally lightly loaded. The watercourse is narrow enough that the tree crowns touch each other in places. The aggradations, if there are any, are coarse and little or not herbaceous (if the environment is intact). The environment is forested. The banks are not clear and are extended by the hillsides framing the very deep watercourse.

Description

Connection of riparian areas (if intact):  Partial

Altitude: <100 m

Watercourse width (low): >15 m

Grain size (banks and bed): Stones and, above all, boulders (rocks present)

Gradient: Average: 5.5% (1-14%)

Current:
Usually medium to fast

Banks:  38° (6°-90°)

Salinity:
<1 g/L

Ten-year daily rainfall: 157 to 235 mm

Sampled stations

In meso- to hygrophilic zone:

  • Beaugendre (upstream)
  • Petite Plaine (upstream)
  • Trou à chiens (midstream, upstream)
  • Rivière Sens (midstream)

Main
species observed

Tree species : Chimarrhis cymosa, Sloanea dentata, Inga ingoides, Cordia sulcata, Ficus insipida, Sterculia caribaea, Cedrela odorata*, Tabebuia heterophylla*, Lonchocarpus punctatus*, Artocarpus altilis, Mangifera indica, Terminalia catappa, Theobroma cacao

Shrub species Piper dilatatum, Thelypteris reticulata, Clidemia hirta, Cyathea arborea, Asplundia rigida (>200 m), Pachystachys spicata, Ricinus communis, Dracanea fragrans

Herbaceous species Selaginella flabellata, Blechnum occidentale, Dieffenbachia seguine, Heliconia wagneriana, Commelina diffusa, Cenchrus purpureus, Tradescantia spathacea, Ipomaea tilacea

underlined: bioengineering / restoration; in gray: species from degraded environments; *: species from somewhat xerophilic environment

Intact type

Degraded type

Intact profile

Learn more about the watercourses and riparian areas of Guadeloupe
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