Water Resources Management

, Volume 22, Issue 7, pp 775–796 | Cite as

The Falling Lake Victoria Water Level: GRACE, TRIMM and CHAMP Satellite Analysis of the Lake Basin

  • Joseph L. Awange
  • Mohammad A. Sharifi
  • Godfrey Ogonda
  • Jens Wickert
  • Erik W. Grafarend
  • Monica A. Omulo
Article

Abstract

In the last 5 years, Lake Victoria water level has seen a dramatic fall that has caused alarm to water resource managers. Since the lake basin contributes about 20% of the lakes water in form of discharge, with 80% coming from direct rainfall, this study undertook a satellite analysis of the entire lake basin in an attempt to establish the cause of the decline. Gravity Recovery And Climate Experiment (GRACE), Tropical Rainfall Measuring Mission (TRMM) and CHAllenging Minisatellite Payload (CHAMP) satellites were employed in the analysis. Using 45 months of data spanning a period of 4 years (2002–2006), GRACE satellite data are used to analyse the variation of the geoid (equipotential surface approximating the mean sea level) triggered by variation in the stored waters within the lake basin. TRMM Level 3 monthly data for the same period of time are used to compute mean rainfall for a spatial coverage of .25°×.25° (25×25 km) and the rainfall trend over the same period analyzed. To assess the effect of evaporation, 59 CHAMP satellite’s occultation for the period 2001 to 2006 are analyzed for tropopause warming. GRACE results indicate an annual fall in the geoid by 1.574 mm/year during the study period 2002–2006. This fall clearly demonstrates the basin losing water over these period. TRMM results on the other hand indicate the rainfall over the basin (and directly over the lake) to have been stable during this period. The CHAMP satellite results indicate the tropopause temperature to have fallen in 2002 by about 3.9 K and increased by 2.2 K in 2003 and remained above the 189.5 K value of 2002. The tropopause heights have shown a steady increase from a height of 16.72 m in 2001 and has remained above this value reaching a maximum of 17.59 km in 2005, an increase in height by 0.87 m. Though the basin discharge contributes only 20%, its decline has contributed to the fall in the lake waters. Since rainfall over the period remained stable, and temperatures did not increase drastically to cause massive evaporation, the remaining major contributor is the discharge from the expanded Owen Falls dam.

Keywords

Lake Victoria Water balance Tropopause temperature Rainfall CHAMP GRACE TRMM 

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References

  1. Altunkaynak A (2006) Forecasting surface water level fluctuations of Lake Van by Artificial Neural Networks. Water Resour Manag 21:399–408CrossRefGoogle Scholar
  2. Amitai E, Marks DA, Wolff DB, Silberstein DS, Fisher BL, Pippitt JL (2006) Evaluation of radar rainfall products: lessons learned from the NASA TRMM validation program in Florida. J Atmos Ocean Technol 23:1492–1505CrossRefGoogle Scholar
  3. Awange JL, Ong’ang’a O (2006) Lake Victoria: ecology, resources and environment. Springer, HeidelbergGoogle Scholar
  4. Awange JL, Grafarend E (2005) Solving algebraic computational problems in geodesy and geoinformatics. The answer to modern challenges. Springer, BerlinGoogle Scholar
  5. Awange JL, Fukuda Y, Takemoto S, Wickert J, Aoyama Y (2004) Analytic solution of GPS atmospheric sounding refraction angles. Earth Planets Space 56:573–587Google Scholar
  6. Crowley JW, Mitrovica JX, Bailey RC, Tamisiea ME, Davis JL (2006) Land water storage within the Congo Basin inferred from GRACE satellite gravity data. Geophys Res Lett 33:L19402. doi:10.1029/2006GL027070 CrossRefGoogle Scholar
  7. Dinku T, Anagnostou EN (2006) TRMM calibration of SSM/I algorithm for overland rainfall estimation. J Appl Meteorol Climatol 45:875–886CrossRefGoogle Scholar
  8. Dunn C, Bertiger W, Bar-Sever Y, Desai S, Haines B, Kuang D, Franklin G, Harris I, Kruizinga G, Meehan T, Nandi S, Nguyen D, Rogstad T, Thomas JB, Tien J, Romans L,Watkins M, Wu S-C, Bettadpur S, Kim J (2003) Instrument of GRACE – GPS augments gravity measurements. GPS World, 1 February 2003Google Scholar
  9. EAC (East African Community) (2006) Lake Victoria basin commission. Special report on the decline of water levels of Lake Victoria. EAC Secretariat, Arusha, TanzaniaGoogle Scholar
  10. Gurbunov ME, Gurvich AS, Bengtsson L (1996) Advanced algorithms of inversion of GPS/MET satellite data and their application to the reconstruction of temperature and humidity, Rep. No. 211, Max-Plunk-Institut für Meteorologie. Hamburg, GermanyGoogle Scholar
  11. Heiskanen WA, Moritz H (1967) Physical geodesy. Freeman and Company, LondonGoogle Scholar
  12. Hinderer J, Andersen O, Lemoine F, Crossley D, Boy JP (2006) Seasonal changes in the European gravity field from GRACE: a comparison with superconducting gravimeters and hydrology model predictions. J Geodyn 41:59–68CrossRefGoogle Scholar
  13. Hildebrand PH (2005) Toward an improved understanding of the global fresh water budget. A symposium on living with a limited water supply 85th AMS Annual Meeting, 9-13 January, San DiegoGoogle Scholar
  14. Kalivas DP, Kollias VJ, Karantounias G (2003) A GIS for the assessment of the spatio-temporal changes of the Kotychi lagoon, western Peloponnese, Greece. Water Resour Manag 17:19–36CrossRefGoogle Scholar
  15. Kayombo S, Jorgensen SE (2006) Lake Victoria: experience and lessons learned brief. International Lake Environment Committee, Lake Basin Management Initiative, Kusatsu, Japan. Available at: http://www.ilec.or.jp/eg/lbmi/reports/27_Lake_Victoria_27February2006.pdf
  16. Kull D (2006) Connections between recent water level drops in Lake Victoria, dam operations and drought. Available at: http://www.irn.org/programs/nile/pdf/060208vic.pdf. Cited 18th May 2006
  17. Kummerow C, Barnes W (1998) The tropical rainfall measuring mission (TRMM) sensor package. J Atmos Ocean Technol 15:809–817CrossRefGoogle Scholar
  18. Li XY, Xu HY, Sun YL, Zhang DS, Yang ZP (2007) Lake-level change and water balance analysis at Lake Qinghai, West China during recent decades. Water Resour Manag doi:10.1007/s11269-006-9096-1 (in press)
  19. Loukas A, Mylopoulos N, Vasiliades L (2006) A modeling system for the evaluation of water resources management strategies in Thessaly, Greece. Water Resour Manag doi:10.1007/s11269-006-9120-5 (in press)
  20. Mendoza ME, Bocco G, Bravo M, Granados EL, Osterkamp WR (2006) Predicting water-surface fluctuation of continental lakes: a RS and GIS based approach in Central Mexico. Water Resour Manag 20:291–311CrossRefGoogle Scholar
  21. Melbourne WG, Davis ES, Duncan CB, Hajj GA, Hardy K, Kursinski R, Mechan TK, Young LE, Yunck TP (1994) The application of space borne GPS to atmospheric limb sounding and global change monitoring. JPL Publ 94–18Google Scholar
  22. Mylopoulos N, Mylopoulos Y, Tolikas D, Veranis N (2006) Groundwater modeling and management in a complex lake-aquifer system. Water Resour Manag 21:469–494CrossRefGoogle Scholar
  23. Nicholson SE (1998) Historical fluctuations of Lake Victoria and other lakes in the Northern Rift Valley of East Africa. In: Lehman JT (ed) Environmental change and response in East African lakes. Kluwer, Dordrecht, pp 7–35Google Scholar
  24. Nicholson SE (1999) Historical and modern fluctuations of lakes Tanganyika and Rukwa and their relationship to rainfall variability. Clim Change 41:53–71CrossRefGoogle Scholar
  25. Owes TY, Taimeh AY (1996) Evaluation of small basin water harvesting system in arid region of Jordan. Water Resour Manag 10:21–34CrossRefGoogle Scholar
  26. Phoon SY, Shamseldin AY, Vairavamoorthy K (2004) Assessing impacts on Lake Victoria basin, Africa. 30th WEDC International Conference. Vientiane, Lao PDRGoogle Scholar
  27. Ramillien G, Cazenave A, Brunau O (2004) Global time variations of hydrological signals from GRACE satellite gravimetry. Geophys J Int 158:813–826CrossRefGoogle Scholar
  28. Ramillien G, Frappart F, Cazenave A, Güntner A (2005) The variation of land water storage from an inversion of 2 years GRACE geoids. Earth Planet Sci Lett 235:283–301CrossRefGoogle Scholar
  29. Reigber C, Schwintzer P, Lühr H, Wickert J (2005) Earth observation with CHAMP: results from three years in orbit. Springer VerlagGoogle Scholar
  30. Riebeek H (2006) Lake Victoria’s falling waters. http://earthobservatory.nasa.gov/Study/Victoria/printall.php
  31. Rodell M, Familglietti JS (2001) Terrestrial water storage variations over Illinois: analysis of observations and implications for GRACE. Water Resour Res 37(5):1327–1340CrossRefGoogle Scholar
  32. Rodell M, Famiglietti JS, Chen J, Seneviratne SI, Viterbo P, Holl S, Wilson CR (2004) Basin scale estimates of evapotranspiration using GRACE and other observations. Geophys Res Lett 31:(L20504)1–4Google Scholar
  33. Rodell M, Johnson N, Famiglietti JS, Chen J, Seneviratne SI, Holl S, Viterbo (2005) Comparison of GRACE derived terrestrial water storage changes with model, water budget, and observation based estimates. A symposium on living with a limited water supply 85th AMS Annual Meeting, 9–13 January, San DiegoGoogle Scholar
  34. Rodell M, Famiglietti JS (2005) The potential of satellite based monitoring of ground water storage changes using GRACE: The high plains aquifer, Central US. J Hydrol 263:245–256CrossRefGoogle Scholar
  35. Steiner AK (1998) High resolution sounding of key climate variables using the radio occultation technique. Dissertation, Institute for Meteorology and Geophysics, University of Graz No. 3Google Scholar
  36. Sanderson VL, Kidd C, McGregor GR (2006) A comparison of TRMM microwave techniques for detecting the diurnal rainfall cycle. J Hydrometeorol 7:687–704CrossRefGoogle Scholar
  37. Shige S, Sasaki H, Okamoto K, Iguchi T (2006) Validation of rainfall estimates from the TRMM precipitation radar and microwave imager using a radiative transfer model: 1. Comparison of the version-5 and -6 products. Geophys Res Lett 33:L13803. doi:10.1029/2006GL026350
  38. Smith AB, Walker JP, Western AW, Ellet KM (2005) Using ground-based gravity measurements to monitor changes in terrestial water storage. Engineers Australia 29th Hydrology and Water Resource Symposium 21–23, February 2005, CanberraGoogle Scholar
  39. Tapley B, Reigber C (2004) GRACE (Gravity Recovery and Climate Experiment). In: McGraw-Hill Yearbook of Science and TechnologyGoogle Scholar
  40. Tapley BD, Bettadpur S, Watkins MM, Reigber CH (2004a) The gravity recovery and climate experiment: mission overview and early results. Geophys Res Lett 31, L09607. doi:10.1029/2004GL019920
  41. Tapley BD, Bettadpur S, Ries JC, Thompson PF, Watkins MM (2004b) GRACE measurements of mass variability in the Earth system. Science 305:503–505CrossRefGoogle Scholar
  42. TSDIS (2006) Tropical rainfall measuring mission science data and information system. Interface control specification between the Tropical Rainfall Measuring Mission Science Data and Information System (TSDIS) and the TSDIS Science User (TSU) TSDIS-P907, vol 4: File Specifications for TRMM Products – Level 2 and Level 3 Release 6.07, code 902Google Scholar
  43. Tsuda T, Heki K, Miyazaki S, Aonashi K, Hirahara K, Tobita M, Kimata F, Tabei T, Matsushima T, Kimura F, Satomura M, Kato T, Naito I (1998) GPS meteorology project of Japan – Exploring frontiers of geodesy. Earth Planets Space 50(10):i–vGoogle Scholar
  44. Viltard N, Burlaud C, Kummerow CD (2006) Rain retrieval from TMI brightness temperature measurements using a TRMM PR-based database. J Appl Meteorol Climatol 45:455–466CrossRefGoogle Scholar
  45. Vorob’ev VV, Krasil’nikova TG (1994) Estimation of the accuracy of the atmospheric refractive index recovery from Doppler shift measurements at frequencies used in the NAVSTAR system. Phys Atmos Ocean 29:602–609Google Scholar
  46. Wagner C, McAdoo D, Klokocník J, Kostelecký J (2006) Degradation of geopotential recovery from short repeat-cycle orbits: application to GRACE monthly fields. J Geod 80:94–103CrossRefGoogle Scholar
  47. Wahr J, Molennar M, Bryan F (1998) Time variability of the Earth’s gravity field: hydrological and oceanic effects and their possible detection using GRACE. J Geophys Res 103(B12): 30205–30229CrossRefGoogle Scholar
  48. Wickert J, Beyerle G, Schmidt T, Marquardt C, König R, Grundwaldt L, Reigher C (2003) GPS radio occultation with CHAMP. In: Reigber C, Lühr H, Schwintzer P (eds) First CHAMP mission results for gravity, magnetic and atmospheric studies. Springer, Heidelberg, pp 371–383Google Scholar
  49. Wickert J, Schmidt T, Beyerle G, König R, Reigber C, Jakowski N (2004) The radio occultation experiment aboard CHAMP: operational data analysis and validation of vertical atmospheric profiles. J Meteorol Soc Jpn 82(1B):381–395, special issue application of GPS remote sensing to meteorology and related fieldsCrossRefGoogle Scholar
  50. Wickert J, Schmidt T, Beyerle G, Michalak G, König R, Heise S, Reigher C (2006a) GPS radio occultation with CHAMP and GRACE: recent results. In: Foelsche U, Kirchengast G, Steiner A (eds) Atmosphere and climate: studies by occultation methods. Springer, Berlin, pp 3–16CrossRefGoogle Scholar
  51. Wickert J, Schmidt T, Beyerle G, Heise S, Reigber C (2006b) Global atmospheric sounding with GPS radio occultation aboard CHAMP. In: Flury J, Rummel R, Reigber C, Rothacher M, Boedecker G, Schreiber U (eds) Observation of the Earth system from space. Springer, Berlin, pp 55–67CrossRefGoogle Scholar
  52. WMO (1986) Atmospheric ozone, Tech. Rep. 16. World Meteorological Organisation, Geneva, Switzerland 1986Google Scholar
  53. Xia J, Zhang L, Liu C, Yu J (2006) Towards better water security in North China. Water Resour Manag 21:233–247CrossRefGoogle Scholar
  54. Xu CY, Singh VP (2004) A review on monthly water balance models for water resources investigations. Water Resour Manag 12:20–50CrossRefGoogle Scholar
  55. Xu L, Zhang Q, Li H, Viney NR, Xu J, Liu J (2007) Modeling of surface runoff in Xitiaoxi catchment, China. Water Resour Manag doi:10.1007/s11269-006-9083-6 (in press)

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Joseph L. Awange
    • 1
  • Mohammad A. Sharifi
    • 2
  • Godfrey Ogonda
    • 3
  • Jens Wickert
    • 4
  • Erik W. Grafarend
    • 5
  • Monica A. Omulo
    • 6
  1. 1.Western Australia Center of Geodesy & The Institute for Geoscience Research, Department of Spatial SciencesCurtin University of TechnologyBentleyAustralia
  2. 2.Surveying and Geomatics Engineering Department, Faculty of EngineeringUniversity of TehranTehranIran
  3. 3.Institute of NavigationStuttgart UniversityStuttgartGermany
  4. 4.Department 1: Geodesy and Remote SensingGeoForschungsZentrum Potsdam (GFZ)PotsdamGermany
  5. 5.Department of Geodesy and GeoinformaticsStuttgart UniversityStuttgartGermany
  6. 6.Department of EnvironmentMaseno UniversityMasenoKenya

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