The 26th cycle in the water treaty Mexico-USA, related to drought in the Conchos River Basin

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The 26th cycle in the water treaty Mexico-USA, related to drought in the Conchos River Basin

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Title: The 26th cycle in the water treaty Mexico-USA, related to drought in the Conchos River Basin
Author: Velasco, I.; Aparicio, F. J.; López, O.
Abstract: The Conchos River is one of the most important tributaries of the Río Bravo/Rio Grande (RB/RG), and its runoff constitutes a significant portion of the water flowing to the international dams. Rainfall evaluation for the 26th cycle of the 1944 International Water Treaty (from October, 1997 to September, 2002, a five-year period), through the isohietal method, and SPI and PDSI drought indices, shows that rain amount has been deficient, and therefore not enough to fulfill the delivery volumes specified in the Treaty. The valuations in hydrological annual terms, through SPI and PDSI methods, show that on wide areas of the basin, rainfall has been lower than mean long-term conditions, with the consequence of lower surface runoff toward reservoirs, and also lower infiltration into aquifers. As a result, the hydrological RB/RG region as a whole, including the Conchos River basin, has been severely limited to satisfy water demand; if this condition does not get better in the short term, regional conditions could be harder, and only a deep change in water management will allow to mitigate damages and impacts due to this situation.
URI: http://bva.colech.edu.mx/xmlui/handle/123456789/HASH0179cf3780cdc54f2d69049b
Date: 2012-03-09

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Observatorio Ambiental de El Colegio de Chihuahua (COLECH)
Biblioteca Virtual Ambiental del Estado de Chihuahua (BVA)
Correo electrónico: bva@colech.edu.mx

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