This essay Energy Flow Systems has a total of 1331 words and 6 pages.
Energy Flow Systems
Richard White's Organic Machine, and William Cronon's Changes in the
Land, both examine environments as energy flow systems. The energy flow model
was utilized by the authors to explain relationships within ecosystems.
Richard White's thesis is to examine the river as an organic machine, as
an energy system that, although modified by human intervention, maintains it's
natural, its ?unmade? qualities. White emphasizes on energy because it is a
useful concept that can be easily understood. He says, ?the flow of the river
is energy, so is the electricity that comes from the dams that block that flow.
Human labor is energy; so are the calories that are stored as fat by salmon for
their journey upstream.? White notes that energy is as concrete as salmon,
human bodies, and the Grand Coulee Dam. White wants his readers to think about
nature and its relationship with humanity.
White explains how the river is energy. The Columbia River works as
gravity pulls it to the Pacific Ocean. The Columbia is continuously cutting
into the terrain that it flows through. Over millions of years water rushed
through the Columbia Basin to form the Columbia River. Water carries soil, silt,
and debris downstream. The constant movement of material in the river cuts and
shapes the river basin into the land. This movement is a slow and inefficient
use of energy. According to White, only two percent of water's potential energy
results in the work of erosion. The other ninety-eight percent of water's energy
was lost as water molecules rub against themselves, the river bed, and the river
banks. This energy was released as heat into the river.
Often the energy of flowing water was not recognized. There are
occasions when rivers do show their power is destructive ways. Power was
usually demonstrated through floods, and more so in flash floods. Thousands of
years ago, an ice dam in the Columbia River, holding the glacial lake Missoula,
broke and created the largest known freshwater flood in earth's history. The
flood rushed into the Columbia Channel and created the Grand Coulee and other
rock channels that would have taken the Mississippi River three hundred years at
full flood to create.
Salmon are also a part of the Colombian energy model. As the river
works its way downward to the Pacific Ocean, the salmon work their way up the
Columbia to spawn. The energy in salmon can be measured by their body fat and
caloric value. Salmon start their run upstream prepared for the long hard run.
Their bodies have stored fat and oil after a year worth of feeding at sea. The
stored energy in salmon is used as energy as they battle head to head against
the force(energy) of the Columbia River. As the salmon work upstream, they use
their stored energy and their bodies become leaner. When the salmon reach their
destination, they are in ill condition. The skinny salmon lay their eggs and
die of exhaustion.
Work and energy also link humans to the Columbia River energy model.
Alexander Ross and his crew learned how powerful the river was in 1811. They
attempted to enter the mouth of the Columbia from the Pacific. Ross learned
that the river's current and the ocean's tide work against each other creating
an astonishing amount of friction. Fresh water is pushed several miles out to
sea and the ocean tides can be felt one hundred and forty miles up river. The
tide form sandbars at the mouth of the river and the current crashing on them
produces huge waves and foaming breakers. These breakers form barriers that
Alexander Ross and his crew had to cross.
Human energy challenged the energy of the river mouth in 1811. The
first attempt to cross the barrier was a failure. Ross's friend Fox and his
crew were lost while battling the waves of the seemingly unapproachable mouth of
the Columbia. Ross and his crew with will and muscle somehow survived the force
of the tide and current and made it across the river's mouth for the first time.
Ross's drama to enter the river was explained by White by using the
energy cycle. White explains that lunar energy causes the ocean tide and the
sun provides all of the remaining energy of the cycle. The sun heats the
atmosphere that heats and evaporates the ocean water and provides the wind to
move the moisture to the mountains. The clouds cool and moisture is released as
rain or snow that falls to the land. Gravity pulls the water to the ocean again
through the rivers and the process starts over again.
Man attempts to slow down the natural energy cycle to extract energy
from the river by building
Topics Related to Energy Flow Systems
Columbia River, Salmon, Grand Coulee Dam, Hydroelectricity, Soil, River, Snake River, Energy development, energy flow model, glacial lake missoula, columbia river water, grand coulee dam, william cronon, flash floods, organic machine, water molecules, columbia basin, changes in the land, river banks, energy results, columbia river, flow systems, human bodies, flowing water, ninety eight, energy system, human intervention, potential energy
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