208:. The Papaloapan river basin was subject to frequent flooding, with the damage sometimes compounded by cyclones. A particularly severe flood in September 1944 covered 470,000 hectares, with great loss of life and property. The Miguel Aleman dam reduced the problem, but further floods occurred after it had been completed in 1955. A flood in 1958 covered 195,000 hectares and one in 1969 covered 340,000 hectares. Meanwhile, the drainage capacity of the Papaloapan river was being reduced by silt carried by the Santo Domingo river. The Papaloapan river Commission recommended building the Cerro de Oro dam on the Santo Domingo river, which would reduce the extent of floods to a manageable level. The combined reservoir of the two dams would also support increased power generation from the Miguel Alemán dam.
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forest to allow for farming in the new settlements, with mixed results. The displaced people later complained that the government had not met its promises in the amount of land allocated. The government denied making such promises, and stated that the people had not owned the flooded land since time
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due to increased release of nutrients from submerged organic matter, combined with thermal stratification, making them less hospitable to many fish species. Land clearance around the reservoirs has caused increasing silting, and human activities have caused pollution from sewage, trash, fertilizers
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The dam curtain is a massive structure of packed earth and gravel. The reservoir covers 22,000 hectares, joined by a channel to the 47,800 hectare reservoir formed by the Miguel Alemán, giving a combined capacity of 13,380 million m. There are plans to add hydroelectric generation capacity to
479:"Report of the Committee set up to examine the representation alleging non-observance by Mexico of the Indigenous and Tribal Peoples Convention, 1989 (No. 169), made under article 24 of the ILO Constitution by the Radical Trade Union of Metal and Associated Workers"
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Approximately 26,000 local people were forced to move. The original plan had been to move the people to the area immediately below the dam, but this was frustrated by large landowners in the target region. The move, mostly of
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state. Construction began in 1973 and the dam was completed in May 1989. About 26,000 people were displaced by the project. Water quality in the reservoir is poor and deteriorating, affecting fish catches.
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below the dam to form the
Papaloapan river, which is joined by the Tonto river to the north of the city of San Juan Bautista Tuxtepec and meanders northeastward through the
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and pesticides. The dams have also affected populations of some species of fish and crustaceans in the tributary rivers by disrupting their migration patterns.
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The future of large dams: dealing with social, environmental, institutional and political costs
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immemorial and therefore were not entitled to compensation, although land had been provided.
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people, took place in two stages, ending up in 30 new villages in the
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377:. Comisión Nacional para el Conocimiento y Uso de la Biodiversidad
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Proceedings of
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397:"A Comparative Survey of Dam-induced Resettlement in 50 Cases"
151:), also called the Miguel de la Madrid Hurtado Dam, is on the
481:. International Labor Organization. 1998. Archived from
345:"The Experience with Dams and Resettlement in Mexico"
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286:. URS Corporation. September 2009. Archived from
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313:"Some Problems of the Papaloapan River Basin"
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217:the dam, delivering about 10.8 megawatts.
456:. Smithsonian Institution. Archived from
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375:"78. PRESA MIGUEL ALEMÁN - CERRO DE ORO"
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402:. California Institute of Technology
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515:Buildings and structures in Oaxaca
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350:. World Commission on Dams.
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196:The Santo Domingo joins the
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454:"UXPANAPA-CHIMALAPA REGION"
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234:region of south-central
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520:Dams completed in 1989
428:. Earthscan. p.
322:. Columbia University
204:coastal plain to the
62:17.99861°N 96.26306°W
16:Dam in Oaxaca, Mexico
247:Environmental issues
221:Displaced population
198:Valle Nacional River
159:municipality of the
153:Santo Domingo River
122:Total capacity
95:Santo Domingo River
67:17.99861; -96.26306
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167:state in southern
175:, located on the
173:Miguel Alemán Dam
161:Papaloapan Region
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134:Surface area
127:Miguel Alemán Dam
117:Cerro de Oro Lake
86:Dam and spillways
78:Opening date
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525:Papaloapan River
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487:. Retrieved
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288:the original
253:oligotrophic
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240:Selva Zoque
177:Tonto River
65: /
41:Coordinates
504:Categories
489:2010-06-29
464:2010-06-29
406:2010-06-29
381:2010-07-02
326:2010-06-30
297:2010-06-29
264:References
181:Papaloapan
147:(English:
53:96°15′47″W
50:17°59′55″N
352:CiteSeerX
257:eutrophic
228:Chinantec
212:Structure
183:basin in
109:Reservoir
236:Veracruz
232:Uxpanapa
202:Veracruz
185:Veracruz
91:Impounds
81:May 1989
27:Location
192:Purpose
155:in the
114:Creates
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169:Mexico
165:Oaxaca
104:75.6 m
101:Height
35:Mexico
31:Oaxaca
400:(PDF)
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