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1. Rivers:
- Mangoro River: The longest river in Madagascar, flowing for approximately 350 kilometers.
- Betsiboka River: Another major river, originating in the Tsaratanana Massif and draining into the Bombetoka Bay.
- Tsiribihina River: A river in western Madagascar, known for its scenic canyons.
2. Lakes:
- Lake Alaotra: The largest lake in Madagascar, located in the eastern region. It is a shallow lake, with an average depth of only 2 meters.
- Lake Itasy: A crater lake situated in the central highlands of Madagascar. It is known for its volcanic origins and scenic landscapes.
- Lake Tsimanampetsotsa: A saline lake located in southwestern Madagascar, known for its unique ecosystem and pink-colored waters.
3. Estuaries:
- Mahajamba Estuary: Located at the mouth of the Betsiboka River on the northwest coast of Madagascar. It is a major mangrove ecosystem and habitat for various marine species.
- Toliara Estuary: Situated in the southwest of Madagascar, at the mouth of the Onilahy River. It is an important area for fishing and aquaculture.
4. Coastal Waters:
- The western coastline of Madagascar faces the Mozambique Channel, known for its rich marine biodiversity, coral reefs, and marine protected areas.
- The eastern coastline borders the Indian Ocean, with important ports such as Toamasina (Tamatave) and Mahajanga. This region is influenced by the East African Coastal Current.
5. Groundwater:
- Madagascar has extensive groundwater resources, particularly in the sedimentary basins and volcanic aquifers. These aquifers provide freshwater for domestic, agricultural, and industrial purposes.
6. Wetlands:
- Madagascar has various wetland ecosystems, including marshes, swamps, and mangroves, which support unique flora and fauna. These wetlands are important for flood control and water purification.