DETERMINATION OF DAILY REGIONAL SCALE ACTUAL EVAPOTRANSPIRATION FOR INDUS SUB-BASIN USING LANDSAT ETM +

Shahzad Sultan, Iftikhar Ahmad

Abstract


Information on evaporation and transpiration from the agricultural field is an important requirement to manage water resources efficiently. The estimation of evapotranspiration through field observation is a laborious and time taking exercise. Current study gives estimation of regional scale evapotranspiration using remotely sensed data and ground based data for central Punjab in Pakistan. Surface Energy Balance Algorithm for Land (SEBAL) has been used to estimate actual evapotranspiration (ETa). SEBAL uses only seven bands (visible, near infrared and thermal infrared) of the Landsat7-ETM+ satellite sensor to estimate per pixel value of actual ETa .Ground based data is also synergized with the satellite data to enhance the validity of the results. The results reveal that using SEBAL model to estimate ETa is an appropriate method in Faisalabad & surroundings.

Full Text:

Untitled

References


Agriculture statistics of Pakistan, 2005-2006. Ministry Of Food, Agriculture & Livestock (Economic Wing), Islamabad – Pakistan.

Agromet Bulletin, October 2000; Published by Pakistan Meteorological Department,

Allen, R. G., L. S. Pereira, D. Raes, and M. Smith, 1998. Crop evapotranspiration, guidelines for computing crop water requirements, FAO Irrig. and Drain. Pap. 56, 300 pp., Food and Agric. Organ. of the U. N. (FAO), Rome, Italy

Bastiaanssen W.G.M., 1998a. “Remote sensing in water resources management: the state of the art”. International Water Management Institute (IWMI), Colombo, Sri Lanka: 118 pp.

Bastiaanssen W.G.M., Menenti M., Feddes R.A. and Holtslag A.A.M., 1998b. ”A remote sensing surface energy balance algorithm for land (SEBAL), 1. Formulation”. J. of Hydr. 212-213: 198-212

Bastiaanssen, W.G.M. (2000) SEBAL-based sensible and latent heat fluxes in the irrigated Gediz Basin, Turkey. J. Hydrology, 229:87-100

Chemin Y., Ahmad M.D. and Asif S., 1999. "Estimating the annual cycle of actual evapotranspiration and evaporative fraction in the Indus Basin: a remote sensing study" Research Report, International Water Management Institute, Colombo, Sri Lanka.

Climate Normals, 1971-2000: Published by Pakistan Meteorological Department.

Doorenbos, J. and W.O. Pruitt, 1977, Crop water requirements. Irrigation and Drainage Paper no. 24 (revised), FAO, Italy, 144pp

Duffie, J. A. and W.A. Beckman, 1980. Solar engineering of thermal processes. New York: John Wiley and Sons.

Monteith, J. L., 1965: Evaporation and Environment. - Symp. Soc. Expl. Biol. 19, 205-234.

Pakistan 2000 Agricultural Census, 2000, Ministry of Economic Affairs and Statistics, Government of Pakistan.

Richard G. Allen and Masahiro Tasumi., 2005, “Benefits from Tying Satellite-based Energy Balance to Ground-based Reference Evapotranspiration” Earth Observation for vegetation monitoring and water management, Napoli.

http://glcf.umiacs.umd.edu/data/landsat http://www.faisalabad.gov.pk/statistics.php http://www.kimberly.uidaho.edu/ref-et/


Refbacks

  • There are currently no refbacks.