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Aswan Dam
by Josh Brock
Physical Geology
Fall 2008
         
                                

 

Damming the Nile: The Aswan High Dam

 

            Throughout history, civilizations have been founded, and sustained by the life-giving properties of major rivers, such as the Nile. Inevitably, as a species, we always strive to safeguard and take control of such resources, wrangling them in so that they may become more advantageous to our needs. There can be no more perfect example of the benefits, and downfalls, of this control than the Aswan High Dam, in Egypt.
 

Image:BarragemAssućo.jpg 

(NASA Satellite Image of Aswan High Dam) (1)
 

            The Aswan High Dam was a project that began it’s infancy in 1954 after the Egyptian Revolution, where the political climate was finally ripe for the construction of a new, modern, super damn. Not surprisingly, the Aswan High Dam was not the first attempt to tame the mighty Nile, but was made to replace the aging and maintenance dependant Aswan Low Dam which was constructed by the British in 1902.
 

            The Low Dam, which had to be raised on two separate occasions to keep from overflowing, was no longer able to keep up it’s fight against the river. The British had entertained the notion of raising it a third time, but the idea was met with stiff opposition.
 

            With the opportunity granted by the Revolution in 1954, however, the newly formed government of Egypt actively began planning and seeking funding for the project.
 

            At first, the United States was set to fund the project, but the deal was later scrapped due to a shifting political climate. The deal then, not surprisingly, came to the Russians, who gladly financed the project in 1958.
 

            Construction of the 3, 830m long and 980m wide Dam began in 1960, and reached full capacity by July 1970.

 

(Aswan Dam Project Design) (2)
 

            The benefits of the construction of the Aswan Dam can be seen as the global justification for constructing a Dam. The first and foremost benefit of the structure is to control the devastating floods that could tear through the Nile River Valley. Indeed, given the fact that approximately 95% of Egypt’s population lives within 12 miles of the Dam(3), this was a very central issue to consider.
 

            Along with controlling flood waters, the Dam also allowed irrigation water to be dispersed to the large agricultural region. Farms that were formerly hampered by either flooding or drought could now increase productivity dramatically with due to the protection and hydration afforded by the Dam.
 

            Another benefit of constructing the Dam was the production of cheap electricity. With twelve electric generators rated at 175 megawatts, the Dam provides 2.1 gigawatts of electricity. This electricity provides much of the power supply for Egypt.
 

            Aside from electricity, flood control, and farming benefits, the reservoir created by the Aswan Dam, Lake Nasser, provides a growing fishing industry. While the industry boasts of growing yield, it is hampered by the lack of large markets in the area.
 

           

(Aswan High Dam) (4)

            While the benefits of Aswan Dam are clearly dramatic, construction of the concrete behemoth has given rise to numerous environmental issues that were not taken into account during construction.
 

            The first, and relatively easiest to anticipate, issue was the displacement of thousands of locals from the project area. Lake Nasser, when created, occupied an area previously inhabited by over 90,000 Nubians. Along with displacing these people and in effect destroying their lifestyle, the flooding caused many archeological sites to be erased and buried under a literal wall of water. 
 

            Next, is the negative effect of the gradual salinization of the Nile farmland. In the past, the soil in the fertile region was annually replenished as the river flooded each season. This flooding would wash away the salt produced by excessive farming, and redeposit a fresh layer of rich soil and minerals over the area. Now that the Dam has stopped this annual happening, the soil is beginning to lose its fertility, and is nowhere near as rich today as it was before the construction of the Dam.
 

            Another agricultural related effect is the chemical pollution of artificial fertilizers. Once clean of chemical pollutants due to the natural fertilization process, the waters are now showing signs of contamination as farmers are forced to rely on man-made materials to increase the productivity of their fields.
 

            Curiously enough, the Dam has also had a very dramatic effect on the population of fish near the eastern basin of the Mediterranean. This region, which is traditionally un-fertile in minerals, used to depend on a flow of silicates and phosphate from the Nile to provide sustenance for the underwater life. Now that the flow has been blocked, the fishing industry has taken a hit and is not expected to recover.
 

            These reasons, combined with a continual build up of silt in the Nasser Lake Reservoir (an inevitable phenomenon which will eventually decrease productivity and render the Dam obsolete) are fuel for many debates about the usefulness of the Dam for the Egyptian Ecosystem and Economy.
 

           

(Temple of Abu Simel which was displaced by Dam construction) (5)
 

            In conclusion, Aswan High Dam is a structure which has proven both to be an economical and industrial boon, and an environmental issue. This Dam is representative, in many ways, of the pros and cons of constructing a similar structure all over the world. The debate about the effectiveness of the Aswan High Dam is ongoing, and proves that the potential effects of construction such a project, both good and bad, should be carefully considered and studied in depth.

 

Sources:

http://earth.jsc.nasa.gov/sseop/EFS/lores.pl?PHOTO=STS102-303-17 (photo) (1)

http://www.proutworld.org/features/nile-filer/image002.jpg (photo) (2)

http://www.pbs.org/wgbh/buildingbig/wonder/structure/aswan_high.html (3)

http://www.mbarron.net/Nile/OWENFALL.JPG  (4)

http://www.mbarron.net/Nile/new-sbl.jpg            (5)

http://carbon.cudenver.edu/stc-link/aswan1/

http://en.wikipedia.org/wiki/Aswan_Dam