HR: 11:55h
AN: U32C-03    [Abstracts]
TI: Advance of the Monitor of Drought for the Northern Region of Mexico
AU: * Reyes Gomez, V M
EM: rey.victor@gmail.com
AF: Instituto de Ecologia, A.C., Centro de Investigacion Sobre Sequia, km 33.31, Carret, Chih. - Ojinaga, Aldama, Chi 32900, Mexico
AU: Nunez Lopez, D
EM: danielnulo@gmail.com
AF: Instituto de Ecologia, A.C., Centro de Investigacion Sobre Sequia, km 33.31, Carret, Chih. - Ojinaga, Aldama, Chi 32900, Mexico
AB: In the last 13 years, the State of Chihuahua suffered a lingering drought that caused social, economical and environmental impacts hardly quantifiable. Since 2002, a monitoring system was implemented to watch the evolution of the meteorological drought in Chihuahua, recently being broadened for the states in the North of Mexico. Evaluation of the Meteorological Drought The Monitoring System on the Drought in Chihuahua includes the following steps: missing data gaps were completed basing on the statistical procedures described by Young (1992); the source code, was compiled to create a computer program, with which it can be derived a level of climatic station, historical series of values for the SPI in time scales of 1 to 48 months; under this classification scheme, it is considered that a drought event begins when the values of the SPI are inferior to -0.7 (McKee et al. 1995). The spatial distribution of the SPI was determined through spatial interpolation techniques using a reverse method of the distance between stations included in Arc/InfoŠ. This same procedure was applied for the States of Sonora, Sinaloa, Durango and Zacatecas with the purpose of implementing this tool for the north of Mexico. Advances on the Monitoring System The monitoring system allows an analysis of the frequency, duration and intensity of the drought events that took place in several climatic regions (Núñez-López et al., 2005); un map of spatial distribution of the SPI for the northern region of Mexico, in the States of Sonora, Sinaloa, Durango and Chihuahua. The generated map will be published in a section on the CEISS web page (www.sequia.edu.mx), together with the monthly bulletin available to the public in general; it is monitoring to an annual scale, the tendencies of the deficits or surplus of the runoff volumes on three of the main dams in the State of Chihuahua Conclusions The Drought Monitoring System in Chihuahua complies with the following international rules for the estimation of the SPI: 1. It is estimated with the standardized index of precipitation used internationally, is special the Drought Monitor Center en Nebraska (E.U.A.) 2. It has as a normal media a historical series of at least 30 years of monthly precipitation. 3. The source code developed was compiled to create a computer program, with which you can derive to a climatic level, historical series of values of the SPI on time scales of 1 to 48 months. 4. The interpolation of values was classified with the current systems accepted internationally. 5. It has as a complement the annual pursuit of the hydrological drought on the level of the basin of the Conchos River through three of the main dams, an index of the deficits of the runof volume is employed and one index of the hydrological drought tendency employed in different parts of the world. Mentioned Literature Nuñez-López D., C.A. Muñoz-Robles, G. Hector, V.M. Reyes-Gómez, 2006. Caractérisation, á diverses échelles de temps, des séquences de sécheresse dans l'état de chihuahua (Mexique). Science et Changements Planétaires - Sécheresse 17(4) : 467-474. McKee, T., N. Doesken, and J. Kleist, "Drought Monitoring with Multiple Time Scales.", Proceedings of the 9th Conference on Applied Climatology, Boston MA, U.S.A., 1995, 233-236 pp. Young, K.C., "A Three-Way Model for Interpolating for Monthly Precipitation Values.", Monthly Weather Review, Vol. 120, Boston, MA. U.S.A., 1992, 2561-2569 pp.
DE: 1800 HYDROLOGY
DE: 1812 Drought
SC: Union [U]
MN: 2007 Joint Assembly