Remote sensing for resources development and environmental management: Remote sensing for resources development and environmental management

Damen, M. C. J.

Bibliographic data

Multivolume work

Persistent identifier:: 856342815

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856342815

Language:: English

Additional Notes:: Volume 1-3 erschienen von 1986-1988

Editor:: Damen, M. C. J.

Document type:: Multivolume work

Volume

Persistent identifier:: 856343064

Title:: Remote sensing for resources development and environmental management

Sub title:: proceedings of the 7th international Symposium, Enschede, 25 - 29 August 1986

Scope:: XV, 547 Seiten

Year of publication:: 1986

Place of publication:: Rotterdam; Boston

Publisher of the original:: A. A. Balkema

Identifier (digital):: 856343064

Illustration:: Illustrationen, Diagramme

Signature of the source:: ZS 312(26,7,1)

Language:: English

Usage licence:: Attribution 4.0 International (CC BY 4.0)

Editor:: Damen, M. C. J.

Publisher of the digital copy:: Technische Informationsbibliothek Hannover

Place of publication of the digital copy:: Hannover

Year of publication of the original:: 2016

Document type:: Volume

Collection:: Earth sciences

Chapter

Title:: 4 Renewable resources in rural areas: Vegetation, forestry, agriculture, soil survey, land and water use. Chairman: J. Besenicar, Liaisons: M. Molenaar, Th. A. de Boer

Document type:: Multivolume work

Structure type:: Chapter

Chapter

Title:: Photo-interpretation of wetland vegetation in the Lesser Antilles. B. Rollet

Document type:: Multivolume work

Structure type:: Chapter

503 Goyaves (G.R.G.) 1:20000 reduced , 3 Low prairie -yperaceae (was i icaco thicket ; 9 Acrostichum .-Avie.-Lagune. hromatic photos .nopies) has to •istic-pedological e of areas to mapping scale, quite sufficient >gical units and low banks, .rge vegetation inundable mestone, peat, , ). generally more lowing in detail d growth condi- ;y classes. The idely different one side, the e , barely meca- jLES the vegetation iblications but scales between illy introduced •ms of mangrove ! palustre (for Figure 6. Sketch of Grande Rivière à Goyaves mouth From ORSTOM colour photo 1:10000 reduced to about 1:13000 A old mouth ; B present mouth ; 1 pure tall Rhiz. 2 Overwash mangrove ; 3 tall Rhiz. ; 4 Cycloned Rhiz. invaded by Rhabdadenia ; 5 Pterocarpus ; 6 Avic. thicket ; 7 Avic. park-like ; 8 Saltflat About the same time Beard (1949) did a similar pioneer work in the Lesser Antilles (except Guade loupe and Martinique), especially in vegetation classification. Unfortunately, wetlands are so small in the English-speaking Islands that they are not shown in his sketchmaps about 1:240000. Portecop (1976,1980) produced two colour vegetation maps 1:150000 with comments showing mangrove (and two facies, Conocarpus and Acrostichum) for Marti nique ; mangrove, Pterocarpus, Cladium swamp and halophilous pastures (the most inland belt) for Guadeloupe. Tandy (1983) drew a tentative unpublished colour map 1:20000 in 7 sheets for Guadeloupe with the following legend and no comment : mangrove, Ptero carpus, xerophilous forest, Cyperaceous swamp, fern swamp, mudflats and saltflats altogether. Rioux et al (1984) published a colour map 1:50000 of the wetlands of Guadeloupe with short comments and the following legend : mangrove, Pterocarpus, Chrysobalanus thicket, Haematoxylon swamp thicket, Cladium swamp, Acrostichum swamp, two types of brac kish inundable prairies (Philoxerus, Eleocharis) and 3 types of freshwater prairies. This map is fairly detailed and was established for health pur poses to show mosquitoes breeding sites in relation to salinity and inundation. Feller et al are preparing an ecological map 1:50000 in colour (one sheet) of the wetlands of Guadeloupe, a joint interpretation of soil and vegetation with comments on both aspects. Chanteur et al (1980,1981) produced unpublished tentative sketchmaps 1:10000 on the mangroves of Martinique with the legend : Rhizophora, Avicennia, Laguncularia, mixtures, grass swamps, saltflats, xerophilous vegetation. The objectives of research and mapping at 1:10000 or 1:20000 were to substantiate the procedure of mangrove reserve establishment in Guadeloupe and Martinique for conservation purposes, not for produc- Figure 7. Morne rouge Photo IGN 68.69 ANT 104-200 294 original 1:20000, reduced to about 1:27000 1 Mixed thicket Rhiz.+Avic.+Lagunc. ; 2 Rhiz. 5- 6 m + scattered Lagunc. ; 3 Pterocarpus ; 4 Nephro- lepis thicket ; 5 Acrostichum fringed by Pterocarpus 6 this point is Cyperaceae in 1984, was Rhiz. in 1968 ; 7 pure Rhiz. thicket ; 8 Cyperaceae swamp 9 tall Rhiz. ; 10 mixed Conocarpus thicket. tion which is minute compared with the energy con sumption of both Départements. Actually some adjustments are necessary on the available maps. 10. THE IMPORTANCE OF WETLANDS IN THE LESSER ANTILLES The largest wetlands in the Lesser Antilles occur in Guadeloupe : mangroves 2 900 ha, Pterocarpus forest 2 300 ha, open swamps 1 000 ha. Next in impor tance is Martinique : mangroves 1 900 ha, Pterocarpus less than 10 ha, grass swamps 700 ha ? Dominica has too steep shores for any significant development of mangroves ; there are no stands al though Laguncularia is locally present (Portsmouth) ; only Pterocarpus occurs in small clumps with Annona glabra nearby and small Acrostichum patches. The mangroves of St-Lucia have been drained during the Second World War : a large swamp near Vieux Fort disappeared leaving few remnants. Pterocarpus is found South of Micoud on the Windward coast. In St-Vincent, Grenada and Barbados only relicts of mangrove and apparently no Pterocarpus occur. Floristic poverty in the Lesser Antilles Wetlands is directly linked to their small size and isolation in spite of the existence of two feeding sources, from the Greater Antilles in the North, from the Continent and Trinidad in the South. 11. THE CARIBBEAN BACKGROUND It is worthwhile mentioning even briefly the impor tance of wetlands in the Caribbean area for the sake of comparison, at least for mangroves. Many islands are provided with rather modest mangrove

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