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  1. Delta - National Geographic Society

    Apr 4, 2025 · The term delta comes from the upper-case Greek letter delta (Δ), which is shaped like a triangle. Deltas with this triangular or fan shape are called arcuate (arc-like) deltas.

  2. Okavango Wilderness Project - National Geographic Society

    The Okavango Delta, a vast fan-shaped wetland located in the Kalahari Desert, receives its life-giving waters from a water tower in the highlands of Angola. The term “water tower” refers to a water supply …

  3. MapMaker: Okavango Wilderness Project - Education

    The map includes the rivers and source lakes as well as the peat deposits of Angola, which feed the Okavango Delta. It also includes the number of species observed by the team at different locations …

  4. Okavango River Basin - Education

    The water of the Okavango Delta begins in the highlands of Angola. It flows down channels and rivers and seeps through peatlands along the Angola-Namibia border and into northern Botswana, where it …

  5. Nile River - National Geographic Society

    May 8, 2025 · Instead of growing in size through the soil deposits, the delta is shrinking due to erosion along the Mediterranean Sea. In addition, annual flooding no longer occurs along parts of the Nile.

  6. Lifeline to a Desert Delta - Education

    Oct 1, 2024 · Students can locate and trace the rivers feeding into the delta then determine which countries they flow through. Focus on the origin point of the Cubango and Cuito Rivers and read …

  7. Education | National Geographic Society

    It is one in a series of World Cultures and Geography lessons intended to promote geographic thinking by using maps and spatial patterns to acquire, understand and communicate information.

  8. Landforms and Landscapes - Education

    Delta Biology, Ecology, Geography, Physical Geography Deltas form as rivers empty their water and sediment into another body of water, such as an ocean, lake, or another river.

  9. Okavango Delta Watershed - Education

    Aug 6, 2024 · Students should determine that it is an inland delta. Then, have students use the map to learn more about the dynamic freshwater system in this delta and watch the video "Sand to Source" …

  10. Anatomy of the Nile - Education

    Earth Science, Geography, Physical Geography Video The Source of the Nile Where does the Nile river begin? As long as 5,000 years ago, the Nile was believed to be a gift from the gods. Learn about the …