deltas
Alluvial fan formations
Deltas is the plural of delta, the fourth letter of the Greek alphabet (Δ, δ).
A river delta is the fan-shaped landform where a river deposits sediment as it meets a larger body of water—named for its resemblance to the triangular letter.
In mathematics and science, delta represents change or difference: The deltas between test scores were minimal.
In recent usage, delta often means a difference or discrepancy more generally: We need to address the deltas between our projections and actual results.
Water-deposited loose sediment
- estuaryTidal mixing zone
- floodplainFlood-prone riverside lowland
- distributaryBranch flowing from river
- siltationAccumulation of fine waterborne particles
coastline · avulsion · anabranch · tidal · marshes · meander · oxbow · fan
Stream entering larger river
- confluenceMeeting point of streams
- flowUnbroken forward movement
- currentDirected flow of charge
- channelPassage for transmission
stream · watershed · drainage · riparian · hydrology · discharge · sedimentation · watercourse
Able to reproduce abundantly
- soilGround matter for planting
- irrigationArtificial water supply for agriculture
- cultivationFostering growth through care
- cropCultivated agricultural plants
harvest · floodplain · rice · farming · silt · nutrient · arable · yield
alluvium
Water-deposited loose sediment
- estuaryTidal mixing zone
- floodplainFlood-prone riverside lowland
- distributaryBranch flowing from river
siltation · coastline · avulsion · anabranch · tidal · marshes · meander · oxbow · fan · lobe
tributary
Stream entering larger river
- confluenceMeeting point of streams
- flowUnbroken forward movement
- currentDirected flow of charge
channel · stream · watershed · drainage · riparian · hydrology · discharge · sedimentation · watercourse · downstream
fertile
Able to reproduce abundantly
- soilGround matter for planting
- irrigationArtificial water supply for agriculture
- cultivationFostering growth through care
crop · harvest · floodplain · rice · farming · silt · nutrient · arable · yield · paddy
marsh
Grassy waterlogged lowland
- swampWaterlogged land with vegetation
- mangroveTidal shrub with exposed roots
- ecosystemInterconnected organisms and surroundings
habitat · flora · fauna · aquatic · brackish · reedbed · waterfowl · fishery · biodiversity · estuary
Nile
Africa's longest river
- MississippiSouthern state or major river
- GangesIndia's holiest river
- MekongMajor Southeast Asian river
Amazon · Danube · Niger · Yangtze · Rhine · Irrawaddy · Indus · Colorado · Tigris · Euphrates
- coastal lowlandscoastal plains, lowlands, flatlands, tidewater, coastal wetlands
- Gulf CoastGulf of Mexico, Gulfport, Gulf beaches, Gulf Stream, Alabama
- Southern LandformsAppalachians, Blue Ridge Mountains, coastal plain, Everglades, Gulf Coast
- Caspian RegionCaspian Sea, Baku, Azerbaijan, Kazakhstan, Turkmenistan
- geografiaAmerica, Africa, Asia, Europa, Oceania
- geographycontinents, continent, oceans, countries, country
deltassources
Points of origin
headwaters · springs · origins · mountain streams · fountainheads
deltasconstants
Unchanging fixed values
invariants · stasis · equilibrium · stability · steady states
- deltoid musclesTriangular shoulder muscles
- river deltaAlluvial deposit at mouth
- delta wavesLow-frequency brain oscillations
- Delta ForceElite Army special missions unit
- Nile DeltaEgyptian river's alluvial plain
- Mississippi DeltaRiver's fan-shaped lowland