Wetland Digitization and Inventory Definition (Mitsch and Gosselink 2007): A ‘wetland Inventory’ may be defined as: “the determination of the location and extent of wetlands” Definition (Ramsar 2005): “ The compilation of data about a wetland’s main biophysical features namely: soil, geology, surface area, water regime and water chemistry etc as well as management features such as land use, goods and services.”
Wetland Digitization and Inventory. Definition (Mitsch and Gosselink 2007): A ‘ wetland Inventory ’ may be defined as: “the determination of the location and extent of wetlands” Definition (Ramsar 2005): - PowerPoint PPT Presentation
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Wetland Digitization and Inventory
Definition (Mitsch and Gosselink 2007):
A ‘wetland Inventory’ may be defined as: “the determination of the location and extent of wetlands”
Definition (Ramsar 2005):
“ The compilation of data about a wetland’s main biophysical features namely: soil, geology, surface area, water regime and water chemistry etc as well as management features such as land use, goods and services.”
Type of Information required:
Objective/s of the inventory
Wetland definition
Classification systems used
Method/s of data collection
INTRODUCTION
Wetland Classification:
Analysis of land use map series of Mauritius
Analysis of the Ramsar Wetland Classification Scheme and Regional wetland classification systems such as that used in the Southern African Development Community (SADC)
Landscape Unit approach used by Dugan (1990)
Wetland Digitization:
Land use map series at 1: 25,000 scale (GOM-OS 1991)
Classification units
ArcGIS™ software
METHODOLOGY
Collection of wetland attributes’ data:
Wetland names
Wetland classification
Soil maps
Underlying geology
Climate
Mean elevation
Surface area
Geographic location
Methodology (Cntd)
RESULTS
Wetland Classification:
Eight (8) ecological units were defined:
Marine coasts
Estuarine
Floodplains
Marsh/Swamp
Lacustrine
Depressions
Mangroves
Reservoirs
Results (Cntd)
Wetland Digitization: 129 wetland polygons and 144 point features
Ecological units
SurfaceArea of polygons (km2)
Distribution of ecological units point features per region
N NW E SE S SW W CPL CPW
Marine coasts 1.18 2 nil nil 3 nil 1 nil nil nil
Estuarine 0.95 2 2 2 7 3 1 5 nil nil
Floodplains 1.38 3 nil 3 1 1 1 4 nil nil
Marsh/Swamp 2.03 17 nil 22 7 1 nil 1 2 2
Lacustrine 0.13 nil nil nil nil 2 nil nil nil nil
Depressions 0.24 2 1 7 1 7 3 2 2 2
Mangroves 1.17 4 nil 9 3 nil nil nil nil nil
Reservoirs 11.95 1 nil nil nil nil nil 1 4 2
Total 19.03 31 3 44 22 14 6 15 8 6
Results (cntd)
Wetland Attribute Table (129 wetland polygons)No Id Wetland name Region Mean
elevation (m)2d.p.
Surface area(km2) 3d.p.
Underlying Geology
Soil type
Climate type
1 Id1 BBMP SE 0.36 0.847 N/A N/A SB
2 Id1 Le Bouchon SE 0.00 0.142 DL3 N/A H
3 Id1 Bassin Bernard N 0.00 0.086 N/A N/A SP
4 Id1 Le Morne SW 1.15 0.063 BTP C H
5 Id1 Mudflat SE 1.52 0.038 DL1 M H
6 Id1 Bassin Goemons N 0.00 0.004 N/A N/A H
7 Id2 RTREBS NW 0.00 0.266 N/A N/A SB
8 Id2 RChampagne1 SE 0.30 0.127 DI1 H/S H
9 Id2 RChampagne2 SE 0.31 0.076 DI1 H/S H
10 Id2 RChampagne3 SE 0.43 0.073 DI1 H/S H
11 Id2 RChampagne4 SE 2.40 0.118 DI1 H/S H
12 Id2 RChampagne5 SE 2.63 0.142 DI1 H/S H
13Id2
RChampagne6 SE 4.04 0.143 DI1 H/S H
14 Id3 St Martin S 3.25 0.161 BTP L H
15 Id3 La Prairie SW 3.95 0.316 S1 C H
16 Id3 Mare Piram N 25.56 0.121 DI2 G SB
17 Id3 Wolmar1 W 1.99 0.089 S1 C SB
18 Id3 Wolmar2 W 4.39 0.115 S1 C SB
19 Id3 Wolmar3 W 5.06 0.051 S1 C SB
20 Id3 Wolmar4 W 1.71 0.115 S1 C SB
21 Id3 Le souffleur SE 5.04 0.017 DL1 C H
22 Id3 Clemencia E 86.96 0.081 DL2 LG SP
23 Id3 Camp de Masque E 82.78 0.061 DL2 I SP
24 Id3 La Lucie E 67.93 0.035 DL2 I SP
25 Id3 Mare Grand Maree N 15.08 0.172 DI2 L SB
26 Id3 Mare Pont Malette N 18.43 0.044 DI2 L SB
27 Id4 Choisy Barachois E 2.97 0.014 DL3 T H
28 Id4 Mare Rond E 4.92 0.042 DL2 C H
29 Id4 Mare de la Montagne Gourmande E 4.94 0.040 S1 C H
30 Id4 Mare Casse Ghoon E 7.51 0.063 DL2 T H
31 Id4 Mare Blanche E 8.13 0.036 DL2 T H
32 Id4 Mare du Verger E 6.91 0.029 DL2 T H
33 Id4 Mare du Puits E 6.32 0.120 DL2 T H
34 Id4 Mare Planche E 9.94 0.018 DL2 T H
35 Id4 Mare Laurent E 2.43 0.022 DL2 C H
36 Id4 Mare Chevrette E 7.54 0.070 DL2 T H
37 Id4 Mare- aux- Anguilles E 8.27 0.055 DL2 T H
38 Id4 Solitude N 29.52 0.015 DI2 G SB
39 Id4 Mare Michaux N 2.46 0.032 DL2 T SB
40 Id4 Grande Mare Longue N 4.01 0.135 DL2 T SB
41 Id4 Mare Camp Pave N 4.32 0.060 DL2 T SB
42 Id4 Mare Millet1 SE 3.61 0.006 DL1 P H
43 Id4 Mare Millet2 SE 5.68 0.021 DL1 P H
44 Id4 Mare Dodo1 SE 9.09 0.007 DL1 P H
45 Id4 Mare Dodo2 SE 6.94 0.023 DL1 P H
46 Id4 Providence wetland E 3.70 0.114 DL2 T H
47 Id4 Mare Sottise N 7.32 0.009 DL2 T SB
48 Id4 Mare Soyfoo N 5.15 0.022 DL2 T SB
49 Id4 Mare aux Trois Ilots E 7.85 0.090 DL2 T H
50 Id4 Palmar wetland E 7.07 0.017 DL2 T H
51 Id4 Cap Malheureux wetland N 6.08 0.030 DL2 T SB
52 Id4 Pte de Roche Noir wetland E 4.87 0.056 S1 T H
53 Id4 Mare Tatos E 8.43 0.048 DL2 T H
54 Id4 Mare aux Lubines E 6.93 0.012 DL2 P H
55 Id4 Dagotiere CPL 443.82 0.182 DL1 B SP
56 Id4 Mare Samson W 4.88 0.024 S1 C SB
57 Id4 Anse Du Bain1 N 9.26 0.006 DL1 P H
58 Id4 Anse Du Bain2 N 6.18 0.008 DL1 P H
59 Id4 Pointe des Lascars N 9.64 0.024 DL1 P H
60 Id4 Pte Oscorne N 8.45 0.015 DL2 T SB
61 Id4 Grand Barachois N 5.34 0.012 DL2 I SB
62 Id4 Pte Radeau E 1.91 0.009 S1 T H
63 Id4 Beau Vallon 1 SE 7.45 0.047 DL1 I H
64 Id4 Beau Vallon 2 SE 6.06 0.009 DL1 I H
65 Id4 Beau Vallon 3 SE 7.77 0.017 DL1 I H
66 Id4 Mare Phedre1 N 5.72 0.144 DL2 T SB
67 Id4 Mare Phedre2 N 2.49 0.007 DL2 T SB
68 Id4 Mare Phedre3 N 1.24 0.015 DL2 T SB
69 Id4 Grand Baie 1 N 5.97 0.006 DL2 T SB
70 Id4 Grand Baie 2 N 7.11 0.004 DL2 T SB
71 Id4 Grand Baie wetland3 N 2.93 0.033 DL2 T SB
72 Id4 GBassinS
666.43 0.011 DL3 M SP
73 Id4 Mare Sarcelle1 E 3.39 0.199 DL3 T H
74 Id4 Mare Sarcelle2 E 3.54 0.032 DL3 T H
75 Id4 Bar le Duc CPL 469.23 0.009 DI4 I SP
76 Id4 Wetland B E 2.79 0.006 DL3 T H
77 Id5 Grand Bassin S 655.24 0.090 DL3 M SP
78 Id5 Bassin Blanc S 461.97 0.039 DL3 T SP
79 Id6 Wetland A N 8.11 0.012 DL2 P SB
80Id6
Bassin Oozeerally E 1.19 0.008 DL2 T H
81Id6
pond7 E 2.32 0.006 DL3 T H
82 Id6 pond8 E 4.16 0.004 DL3 T H
83Id6
Bassin Rivaltz E 3.09 0.016 DL2 T H
84Id6
Bassin Nozaic E 0.00 0.023 DL2 T H
85Id6
Bassin Requins E 5.68 0.018 DL2 T H
86Id6
Bassin Turmet E 3.41 0.006 DL2 T H
87Id6
Bassin Goemons N 3.27 0.003 DL2 I H
88Id6
Vallee des Pretes pond NW 23.23 0.014 BTP D SB
89Id6
La Crete pond SW 284.28 0.005 BTP M SP
90Id6
Chamarel SW 303.36 0.018 BTP M SP
91Id6
Mapou pond SE 138.39 0.007 DI1 M SP
92Id6
pond9 E 6.92 0.004 DL3 P H
93Id6
Rivulet Ruche S 254.19 0.018 BP T/S SP
94 Id6 Ruche pond S 290.41 0.006 BP T/S SP
95 Id6 Cresson pond2 S 12.40 0.004 DI3 M H
96 Id6 Cresson pond1 S 17.96 0.003 DI3 M H
97 Id6 Michel pond S 78.23 0.003 DI3 M H
98 Id6 La Dagotiere CPL 444.72 0.021 DI3 I SP
99 Id6 Alma pond CPL 450.00 0.011 DI3 LG SP
100 Id6 pond1 S 28.61 0.004 DI2 I H
101 Id6 pond2 S 106.01 0.006 DI2 M H
102 Id6 pond3 S 25.61 0.010 DI2 I H
103 Id6 pond4 S 308.56 0.005 DI3 M H
104 Id6 pond5 S 54.13 0.004 DI2 I H
105 Id6 pond6 S 84.95 0.006 DI2 I H
106 Id7 Pte Corail SE 0.73 0.049 BTP S H
107 Id7 Pte D'Esny SE 1.84 0.110 DL1 C H
108 Id7 Bras de Mer mangrove E 1.38 0.029 DL3 T H
109 Id7 Trou Mano mangrove E 0.00 0.036 DI4 I H
110 Id7 Mangrove Roches Noires E 3.56 0.018 DL2 T SB