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Maximum Daily Precipitation for Aguascalientes, México

Maximum Daily Precipitation for Aguascalientes, México. Sergio I. Martínez-Martínez Term Project of GIS in WR Fall 2002. Nov. 21, 2002. Objectives:. To know the spatial variation of maximum daily precipitation in Aguascalientes. To draw a map which can be used to design water works.

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Maximum Daily Precipitation for Aguascalientes, México

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  1. Maximum Daily Precipitation for Aguascalientes, México Sergio I. Martínez-Martínez Term Project of GIS in WR Fall 2002. Nov. 21, 2002

  2. Objectives: • To know the spatial variation of maximum daily precipitation in Aguascalientes. • To draw a map which can be used to design water works.

  3. Data • Daily precipitation records of 68 climatologic stations in Aguascalientes y 12 in its neighboring states. The combined data are from 1940 to 1998. • A map of Mexico. • A DEM of Aguascalientes.

  4. Statistical Procedure (each station) • Obtain annual maximum and annual exceedance series. • Asign ploting positions. • Fit the series to a probability distribution or regression equation. • Calculate the maximum daily precipitations for the required return periods (2, 5, 10, 20, and 25 years).

  5. Geographic Procedure. Base Map • Obtain the outline of Aguascalientes. • Draw the stations and towns. • Draw raster of elevations and its derived contour curves.

  6. Result: Base Map • Outline • Stations • Towns • Raster of elevations • Topographic contour

  7. Geographic Procedure. Maps for several return periods • Interpolate the attribute of precipitation of the stations feature class to a raster. • Calculate isohyets with the raster of precipitation.

  8. Result: Map of return period of 2 years • Outline • Towns • Raster of elevations • Isohyets of return period of 2 years

  9. Work in Progress... • Test if the maximum daily precipitation is correlated with the elevation. • Outline the procedure to utilize the map of the return period of 2 years to design water works.

  10. Data Sources and Bibliography • Precipitation data: • Quintas, I. 2000 “ERIC II”, IMTA. (In Spanish, it is a database of climatologic variables) • Geographic data: • Map of México was downloaded from (thanks to Carlos Patiño): • http://ww.fhwa.dot.gov/binational/databank/gis.html • DEM obtained from: • http://geoengine.nima.mil./ • Other data: • www.inegi.gob.mx • Hydrologic procedure: • Martínez-Martínez, S.I. (2000) “Introduction to Water Surface Hydrology”, Autonomous University of Aguascalientes, México. (In Spanish).

  11. Questions? Thank all of You, particularly Dr. Maidment!

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