Development of Stream and Landscapes

Jun 30th, 2015
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Streams surround us everyday of our lives, no matter where you live. They are one of the most important natural features of the Earth as well. The first civilizations were based around rivers in the west and recently rivers have been the beginnings of new cities in new countries, such as our own.

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01Geology and Civil EngineeringTHE GEOLOGICAL ENVIRONMENTEarth is an active planet in a constant state of change. Geological processes continually modify the Earth's surface, destroy old rocks, create new rocks and add to the complexity of ground conditions.Cycle of geology encompasses all major processes, which are cyclic, or they would grind to an inevitable halt.Land: mainly erosion and rock destruction.Sea: mainly deposition, forming new sediments.Underground: new rocks created and deformed.Earth movements are vital to the cycle; without them the land would be eroded down to just below sea level.Plate tectonics provide the mechanism for nearly all earth movements (section 09). The hot interior of the Earth is the ultimate energy source, which drives all geological processes.Geological time is an important concept. Earth is4000M years old and has evolved continuously towards its present form.Most rocks encountered by engineers are 10-500M years old. They have been displaced and deformed over time, and some are then exposed at the surface by erosional removal of rocks that once lay above them. Underground structures and the ground surface have evolved s

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