In Cooperation with the World Bank, the Mauritania Ministry of Mines and Industry, and Futures Group Inventory and Review of Existing PRISM Hydrogeologic Data for the Islamic Republic of Mauritania, Africa By Michael J. Friedel Open-File Report 2008–1138 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior DIRK KEMPTHORNE, Secretary U.S. Geological Survey Mark D. Myers, Director U.S. Geological Survey, Reston, Virginia 2008 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Suggested citation: Friedel, M.J., 2008, Inventory and review of existing PRISM hydrogeologic data for the Islamic Republic of Mauritania, Africa: U.S. Geological Survey, Open-File Report 2008-1138. 69 p. 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Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. ii Contents Abstract................................................................................................................................................................................1 Introduction .........................................................................................................................................................................2 Inventory of Hydrogeologic Information ........................................................................................................................3 Reports of Choum-Zouerate .........................................................................................................................................3 GIS, Excel, and Document Files of Mauritania..........................................................................................................4 Relational Database of Choum-Zouerate and Mauritania ......................................................................................4 Review of Hydrogeologic Information ............................................................................................................................4 Reports..............................................................................................................................................................................5 Hydrogeologic Setting ...............................................................................................................................................5 Evaporation, Evapotranspiration, and Precipitation.............................................................................................5 Recharge ......................................................................................................................................................................6 GIS and SIPPE2 ...............................................................................................................................................................6 Water Quantity ............................................................................................................................................................6 Water Quality...............................................................................................................................................................8 Summary and Conclusions ...............................................................................................................................................9 Report Limitations .......................................................................................................................................................9 GIS Coverage Limitations ........................................................................................................................................10 SIPPE2 Database Limitations..................................................................................................................................10 Suggestions ...............................................................................................................................................................11 References Cited ..............................................................................................................................................................11 Figures 1. Schematic of relational tables in SIPPE2 Access database. ...............................................................................13 2. Relief, streams, sebkhas, and lakes..........................................................................................................................14 3. Aquifers defined based on success ratio ................................................................................................................15 iii 4. Distribution of hydraulic head values provided as GIS coverages.....................................................................16 5. Distribution of measured water levels from the SIPPE2 database .....................................................................17 6. Distribution of aquifer transmissivity from the SIPPE2 database........................................................................18 7. Distribution of dissolved nitrate in groundwater from the SIPPE2 database....................................................19 8. Distribution of dissolved bicarbonate in groundwater from the SIPPE2 database..........................................20 9. Distribution of dissolved sodium in groundwater from the SIPPE2 database...................................................21 10. Distribution of dissolved oxygen in groundwater from the SIPPE2 database.................................................22 11. Distribution of electrical conductivity in groundwater from the SIPPE2 database........................................23 Tables 1. Summary of available annual climate information.................................................................................................24 2. Annual evaporation, evapotranspiration, and humidity measurements ............................................................24 3. Summary of evaporation at measurement stations across Mauritania.............................................................25 4. Summary of groundwater physical parameter and chemical concentrations from SIPPE2 database........26 5. Hydrogeologic information found in the Carte Hydro choumZte folder. ............................................................28 6. Hydrogeologic information found in subfolders of the Rapports folder.............................................................28 7. Hydrogeologic information (PRISM-2) found in subfolders of the SIPPE2 folder.............................................30 8. Hydrogeologic information found in subfolders of the Hydrology folder...........................................................31 9. Hydrogeologic information found in subfolders of the SIGE folder.....................................................................33 10. Overview of tables and fields found in the SIPPE2 database ............................................................................36 11. Hydrogeologic inventory of aquifer area, thickness, and volume.....................................................................40 12. Hydrogeologic inventory of production, porosity, and hit ratio .........................................................................43 13. Hydrogeologic inventory of instantaneous flows and associated salinity concentrations..........................46 14. Hydrogeologic inventory of hydraulic properties.................................................................................................49 15. Hydrogeologic inventory of piezometric head map and recharge potential...................................................52 iv Appendix Files A. Overview of Hydrogeologic Information Provided to the USGS. ...................................................................................27 B. Overview of Tables in the PRISM-2 (SIPPE2) Relational Database ...............................................................................35 C. Hydrogeologic Inventory Based on Existing Reports......................................................................................................39 D. Meteorology Questionnaire ............................................................................................................................................55 E. Hydrology Questionnaire .................................................................................................................................................59 F. Groundwater Questionnaire ............................................................................................................................................64 v Conversion Factors Inch/Pound to SI Multiply By To obtain Length foot (ft) 0.3048 meter (m) mile (mi) 1.609 kilometer (km) yard (yd) 0.9144 meter (m) Volume ounce, fluid (fl. oz) 0.02957 liter (L) gallon (gal) 0.003785 cubic meter (m3) cubic inch (in3) 0.01639 liter (L) cubic foot (ft3) 0.02832 cubic meter (m3) Flow rate foot per second (ft/s) 0.3048 meter per second (m/s) cubic foot per