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Mechanical weathering in which rocks collide and scrape against each other, wearing away the exposed surfaces. |
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Fan-shaped deposit of sediments at the base of a slope on land. |
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| The lowest level to which a stream can erode the channel through which it flows, generally equal to the prevailing global sea level. |
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| Sediment or other material that slides, rolls, or bounces along a stream or channel bed of flowing water. |
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| The force of which rocks and sediments are carried downstream in running water. |
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Fan-shaped deposit of sediments at the mouth of a stream. |
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Volume of water moved by a stream within a given time. |
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Elevated region that separates two watersheds. |
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Drainage Basin or Watershed [image] |
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| Land area where precipitation runs off into streams, rivers, lakes, and reservoirs. |
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| A flood that occurs within a few hours (usually less than six) of heavy or excessive rainfall, dam or levee failure. |
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Part of the valley floor that may be covered with water during a flood. |
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| Deep ditch cut by running water (especially after a prolonged downpour). |
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Lengthening and branching of a stream. |
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| High mounds of silt, which have deposited on the banks of a river during flooding and have frequently been increased by man to protect the floodplain. |
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| Looping changes of direction of a stream. These may be somewhat sine-wave in form. |
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| Crescent-shaped lake formed when a meander from a stream is cut off to form a lake. |
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| A bowl-shaped depression in a rock surface that has been carved by the whirling action of stones in a stream bed. |
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| A homogeneous mixture composed of two or more substances. |
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| The natural movement of groundwater from one river basin to another (sometimes distant) basin. |
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| A mixture in which fine particles are suspended in a fluid where they are supported by buoyancy. |
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| A water gap is an opening or notch which flowing water has carved through a mountain range. Water gaps often offer a practical route for roads and railroads to cross a mountain ridge. |
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