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Calibrating priestley-taylor model to estimate open water evaporation under regional advection using volume balance method-case study: chahnimeh reservoir, Iran

Daneshkar Arasteh, P ; Sharif University of Technology | 2008

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  1. Type of Document: Article
  2. DOI: 10.3923/jas.2008.4097.4104
  3. Publisher: 2008
  4. Abstract:
  5. The objective of this study is to calibrate Priestley-Taylor (PT) model for estimating open water evaporation from an arid region reservoir called Chahnimeh. Chahnimeh Reservoir which is situated in the Sistan area in the southeast of Iran is being affected by regional energy advection during May to October. Therefore, common models of open water evaporation estimation such as PT require calibration. PT method was calibrated for Chahnimeh Reservoir using a volume balance method. Results showed that PT coefficient, αPT, as a constant over the year varies between 2.47±0.09 and 1.20±0.03 for two different hydrologic conditions of dry and wet. It means that there is also an intra-annular variation in αPT. Calibration of PT model also showed that Cipj. is a time dependant variable and varies monthly. In other word there is an inter-annular variation. Inter-annular variation of αPT showed that this coefficient varies from 1.56 to 3.16 against 0.67 to 1.95 for dry and wet conditions, respectively. © 2008 Asian Network for Scientific Information
  6. Keywords:
  7. Balance methods ; Common models ; Dry and wet ; Dry and wet conditions ; Hydrologic conditions ; Open water ; Priestley-taylor ; Pt models ; Advection ; Arid regions ; Calibration ; Estimation ; Evaporation ; Reservoirs (water)
  8. Source: Journal of Applied Sciences ; Volume 8, Issue 22 , 2008 , Pages 4097-4104 ; 18125654 (ISSN)
  9. URL: https://scialert.net/abstract/?doi=jas.2008.4097.4104