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Water

Water. Cycle. Evaporation: Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air. Transpiration. Do plants sweat?

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Water

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  1. Water Cycle

  2. Evaporation: Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air.

  3. Transpiration • Do plants sweat? • Well, sort of.... people perspire (sweat) and plants transpire. Transpiration is the process by which plants lose water out of their leaves. Transpiration gives evaporation a bit of a hand in getting the water vapor back up into the air.

  4. Transpiration and evaporation make up Evapotranspiration

  5. Condensation: Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation.

  6. Precipitation: Precipitation occurs when so much water has condensed that the air cannot hold it anymore. The clouds get heavy and water falls back to the earth in the form of rain, hail, sleet or snow.

  7. Collection: When water falls back to earth as precipitation, it may fall back in the oceans, lakes or rivers or it may end up on land. When it ends up on land, it will either soak into the earth and become part of the “ground water” that plants and animals use to drink or it may run over the soil and collect in the oceans, lakes or rivers where the cycle starts all over again. Collection

  8. Infiltration • The flow of water from the ground surface into the ground. Once infiltrated, the water becomes soil moisture or groundwater

  9. Groundwater • Groundwater is water located beneath the Earth’s surface in soil pores and rock fractures.

  10. Groundwater • When rain falls to the ground, the water does not stop moving. • Some of it flows along the land surface to streams, lakes, or oceans. • Some is used by plants. • Some evaporates and returns to the atmosphere.

  11. Aquifers • Water seeps underground, into pores between sand, clay and rock formations called aquifers. • Water moves through aquifers much like a glass of water poured onto a pile of sand.

  12. Catawba Aquifer Charlotte Drainage Area, square miles (NC): 3,343 River miles (including tributaries): 3,004 Population (2000): 1,170,512

  13. Watershed

  14. Drainage Basin • A drainage basin is where surface water from rain, melting snow or ice converges to a single point. • The drainage basin acts as a funnel by collecting all the water within the area covered by the basin and channeling it to a single point. Each drainage basin is separated topographically from adjacent basins by a geographical barrier such as a ridge, hill or mountain.

  15. Example of a drainage basin. The dashed line is the main water divide of the hydrographic basin.

  16. Drainage basin Notice the tree branch of rivers and streams that make up the Charlotte watershed.

  17. Watershed drainage basin in the North Carolina mountains. Exercise: Delineating a Watershed Boundary

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