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Watercourse in flood zone

Type 2

Salinity: (<1 g>
Altitude: <50 m (ici 1-28 m)
Width of the watercourse (bottom width):  <10 m
Current: Usually slow

Description

The watercourse is generally with a low or no gradient and has mainly fine grain size. The water is fresh. The environment is normally forested with a partial or total connection of riparian areas. The width of the watercourse is narrow and the presence of banks is variable. The presence of Pterocarpus officinalis, and Montrichardia arborescens is typical in an intact area. Type absent from the leeward coast.

Description

Connection of riparian areas (if intact):  partial or total

Altitude: <50 m (ici 1-28 m)

Watercourse width (low): <10 m

Grain size (banks and bed): fine (sometimes stones and pebbles if medium gradient)

Gradient: Low : 1% (0-6%)

Current:
Usually slow

Banks:  present or not, often floodable, average gradient 17 ° (0 ° -60 °)

Salinity:
(<1 g>

Ten-year daily rainfall: 151 to 205 mm

Sampled stations

  • Ravine Onze heures (downstream, midstream)
  • Lamentin (downstream)
  • Madame (downstream, midstream)
  • Nogent (downstream)
  • Viard (midstream)

Main
species observed

Tree species: Pterocarpus officinalis, Annona glabra Onze heures (downstream, midstream), Calophyllum antillanum, Inga ingoides, sometimes Lonchocarpus heptaphyllus, even Margaritaria nobilis, Bambusa vulgaris, Cocos nucifera, Terminalia catappa, Gliricidia sepium.

Shrub species: Acrostichum spp., Montrichardia arborescens (top of bank: Thelypteris reticulata), Mimosa pigra, Pachystachys spicata, Senna alata.

Herbaceous species: Adiantum latifolium, Phyllantus mimosoides (some stations closed), Commelina diffusa, Hymenachne amplexicaulis, Ludwigia hyssopifolia, Steinchisma laxum.

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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