DiDEM project

Dialogue Science-Decision-Makers for the Integrated Management of the Coastal and Marine Environment

Integrate scientific knowledge into decision-making for coastal and marine management in the Western Indian Ocean (Comoros, Kenya, Madagascar, Mauritius, Mozambique, Seychelles, Tanzania), 2021-2024

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1 to 10 of 11 Results

Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Feb 16, 2024 Hervé, Dominique; Randrianatoandro, Ravakiniaina; Delaitre, Eric; Robison, Laurent; Razanaka, Samuel; Ratiarson, Venot, 2024, "Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)", https://doi.org/10.23708/COLVLV, DataSuds, V1 Long time series (more than a century) are difficult to construct but they are useful for understanding hydro-geomorphological phenomena that take place over the long term and anticipating future risks. The Betsiboka River into which the Ikopa flows from Antananarivo, capital of...
DIDEM_Betsiboka_Delta_01_README.txt Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Plain Text - 3.4 KB - MD5: 9a7d68f27f682bf455db7d40d882d817 Documentation Dataset description
DIDEM_Betsiboka_Delta_02_Authors_Contributions_EN.pdf Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Adobe PDF - 113.2 KB - MD5: 02aff060eb26f7f5d00b10a2ab403395 Documentation Co-author contribution details.
DIDEM_Betsiboka_Delta_03_Downstream_LongLimit_1.pdf Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Adobe PDF - 334.6 KB - MD5: d3fbb51a793a835071ea7029f837706e Data Detail of the downstream limit of the Betsiboka delta, between Boanamary in the right bank and a river in the left bank.
DIDEM_Betsiboka_Delta_04_LargeLimit_2.pdf Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Adobe PDF - 518.1 KB - MD5: da1207c2d5b47c908f6df6b64467b70e Data Large limits of the delta are defined by the extension of mangrove soils in green (ORSTOM, 1952) and the maximum extension of flooded area in red (flooded area in 2015-2016 by Catry et al., 2017).
DIDEM_Betsiboka_Delta_05_Limits_3.jpg Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) JPEG Image - 1.9 MB - MD5: db9dca815b111a010f1be6b12641f547 Data The definitive limits of the delta are defined by the downstream long limit (Boanamary), the upstream first right channel, and the large limits defined according to mangrove and flooded area.
DIDEM_Betsiboka_Delta_06_Axis_Equidistants_1.jpg Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) JPEG Image - 5.1 MB - MD5: 6e41def3b96fd79929ad9af5412a2a23 Data Course of the main axis of the Betsiboka river in its delta, with equidistants points (Sentinel 2, 2021).
DIDEM_Betsiboka_Delta_07_Transects_2.jpg Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) JPEG Image - 5.2 MB - MD5: 88053ffaa04bb1f71d70f7521415ac0a Data 13 equidistants transects in the Betsiboka delta (Sentinel 2, 2021).
DIDEM_Betsiboka_Delta_08_Up-Mid-Down-Stream_3.jpg Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) JPEG Image - 5.1 MB - MD5: 1a8eac1fa3f75d5476ed8c2b6edce607 Data 13 transects in the Betsiboka delta, grouped in Upstream, Midstream and Downstream sections (Sentinel 2, 2021).
DIDEM_Betsiboka_Delta_09_GeoUnits_2020_1.pdf Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021) Adobe PDF - 6.3 MB - MD5: 04339555c4fa22f542e1e4da23c61e00 Data Grid with 4km by 4 km boxes applied on the Betsiboka delta, numbered to enable localization of the 186 geomorphological units identified in the Sentinel 2 image of 2020 (dry period, low tide).

Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Feb 16, 2024

Hervé, Dominique; Randrianatoandro, Ravakiniaina; Delaitre, Eric; Robison, Laurent; Razanaka, Samuel; Ratiarson, Venot, 2024, "Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)", https://doi.org/10.23708/COLVLV, DataSuds, V1

Long time series (more than a century) are difficult to construct but they are useful for understanding hydro-geomorphological phenomena that take place over the long term and anticipating future risks. The Betsiboka River into which the Ikopa flows from Antananarivo, capital of...

DIDEM_Betsiboka_Delta_01_README.txt

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Plain Text - 3.4 KB -

Documentation

Dataset description

DIDEM_Betsiboka_Delta_02_Authors_Contributions_EN.pdf

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Adobe PDF - 113.2 KB -

Documentation

Co-author contribution details.

DIDEM_Betsiboka_Delta_03_Downstream_LongLimit_1.pdf

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Adobe PDF - 334.6 KB -

Data

Detail of the downstream limit of the Betsiboka delta, between Boanamary in the right bank and a river in the left bank.

DIDEM_Betsiboka_Delta_04_LargeLimit_2.pdf

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Adobe PDF - 518.1 KB -

Data

Large limits of the delta are defined by the extension of mangrove soils in green (ORSTOM, 1952) and the maximum extension of flooded area in red (flooded area in 2015-2016 by Catry et al., 2017).

DIDEM_Betsiboka_Delta_05_Limits_3.jpg

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

JPEG Image - 1.9 MB -

Data

The definitive limits of the delta are defined by the downstream long limit (Boanamary), the upstream first right channel, and the large limits defined according to mangrove and flooded area.

DIDEM_Betsiboka_Delta_06_Axis_Equidistants_1.jpg

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

JPEG Image - 5.1 MB -

Data

Course of the main axis of the Betsiboka river in its delta, with equidistants points (Sentinel 2, 2021).

DIDEM_Betsiboka_Delta_07_Transects_2.jpg

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

JPEG Image - 5.2 MB -

Data

13 equidistants transects in the Betsiboka delta (Sentinel 2, 2021).

DIDEM_Betsiboka_Delta_08_Up-Mid-Down-Stream_3.jpg

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

JPEG Image - 5.1 MB -

Data

13 transects in the Betsiboka delta, grouped in Upstream, Midstream and Downstream sections (Sentinel 2, 2021).

DIDEM_Betsiboka_Delta_09_GeoUnits_2020_1.pdf

Feb 16, 2024 - Identification, localization and numbering of islets and geomorphological units of the Betsiboka delta (northwestern Madagascar) on Sentinel 2 satellite images (2020, 2021)

Adobe PDF - 6.3 MB -

Data

Grid with 4km by 4 km boxes applied on the Betsiboka delta, numbered to enable localization of the 186 geomorphological units identified in the Sentinel 2 image of 2020 (dry period, low tide).

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