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- La BVA es una colección de recursos educativos que tratan sobre temas ambientales que conciernen al estado de Chihuahua, México. Este repositorio temático está intencionado para beneficio de la sociedad y sin fines de lucro, con el objetivo de facilitar el acceso al conocimiento ambiental sobre la zona.
Recent Submissions
Acción pública local: una alternativa para dotar de agua potable a las colonias de la periferia de Ciudad Juárez, Chihuahua
(Estudios demograficos y urbanos, 2018-04-20) Córdova Borjórquez, Gustavo
Los cursos de agua compartidos entre México y los Estados Unidos de América y la variable medioambiental. Una aproximación
(Revistas jurídicas UNAM, 2006-01-01) Anglés Hernández, Marisol
This paper examines U.S.-Mexico relations regarding border waters. In the semi-arid border region from Mexico-U.S. the tensions about the use of water, its pollution, and its equitable distribution have increased. Even though there are many obstacles, the cooperation on management of shared resources and jointly addressing transboundary environmental problems has gotten strengthen gradually. The author shows some of the successes and failures of the ambitious border policy initiatives and treaties about the border and emphasizes that Mexico and the U.S. face a great challenge, certainly, it is necessary to consider climatic change to may define planning strategies for water management, and its equitable distribution; urban development, and improvement of the environment in the border area.
Microbial contamination and chemical toxicity of the Rio Grande
(BMC Microbiology, 2004-04-22) Mendoza, Jose; Botsford, James; Hernandez, Jose; Montoya, Anna; Saenz, Roswitha; Valles, Adrian; Vazquez, Alejandro; Alvarez, María
Background
The Rio Grande River is the natural boundary between U.S. and Mexico from El Paso, TX to Brownsville, TX. and is one of the major water resources of the area. Agriculture, farming, maquiladora industry, domestic activities, as well as differences in disposal regulations and enforcement increase the contamination potential of water supplies along the border region. Therefore, continuous and accurate assessment of the quality of water supplies is of paramount importance. The objectives of this study were to monitor water quality of the Rio Grande and to determine if any correlations exist between fecal coliforms, E. coli, chemical toxicity as determined by Botsford's assay, H. pylori presence, and environmental parameters. Seven sites along a 112-Km segment of the Rio Grande from Sunland Park, NM to Fort Hancock, TX were sampled on a monthly basis between January 2000 and December 2002.
Results
The results showed great variability in the number of fecal coliforms, and E. coli on a month-to-month basis. Fecal coliforms ranged between 0–106 CFU/100 ml while E. coli ranged between 6 to > 2419 MPN. H. pylori showed positive detection for all the sites at different times. Toxicity ranged between 0 to 94% of inhibition capacity (IC). Since values above 50% are considered to be toxic, most of the sites displayed significant chemical toxicity at different times of the year. No significant correlations were observed between microbial indicators and chemical toxicity.
Conclusion
The results of the present study indicate that the 112-Km segment of the Rio Grande river from Sunland Park, NM to Fort Hancock, TX exceeds the standards for contact recreation water on a continuous basis. In addition, the presence of chemical toxicity in most sites along the 112-Km segment indicates that water quality is an area of concern for the bi-national region. The presence of H. pylori adds to the potential health hazards of the Rio Grande. Since no significant correlation was observed between the presence of H. pylori antigens and the two indicators of fecal contamination, we can conclude that fecal indicators cannot be used to detect the presence of H. pylori reliably in surface water.
Tecnologías alternas de desalinización del acuífero del Bolsón del Hueco para el abastecimiento de agua potable a Ciudad Juárez, Chih., México.
(CULCyT, 2015-06) Luján, R.; Garza-Almanza, V.; Quevedo Urías, H.
Debido a las condiciones climatológicas imperantes en la zona de Ciudad Juárez, Chih., México, al continuo incremento en la demanda de agua potable y a las características físicas de la única fuente de suministro de agua de la ciudad, el acuífero subterráneo denominado Bolsón del Hueco, el volumen y calidad de los recursos de agua dulce disponibles constantemente se reducen. Esto se hace manifiesto en el abatimiento del acuífero y en la reducción de la calidad de sus aguas. Se analiza la necesidad de explorar varias alternativas que permitan su mejor aprovechamiento y conservación. Una solución potencial al problema de escasez que se avecina radica en la utilización de los importantes volúmenes de agua salobre del acuífero, lo cual puede hacerse mediante procesos de desalación. En el presente trabajo se describen las condiciones generales del Bolsón, sus características hidrogeológicas y de calidad del agua. Se presentan algunos procesos de desalación de mayor uso a nivel mundial.
Agua: Problemática del agua y crecimiento urbano en Ciudad Juárez, Chihuahua
(CULCyT, 2015-06) Salas-Plata Mendoza, Jorge A.