The estimation of average areal rainfall by percentage weighting polygon method in Southeastern Anatolia Region,Turkey |
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| Institution: | 2. The Henry Samueli School of Engineering, Civil and Environmental Engineering, University of California, Irvine, CA, USA;1. Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia;2. Institute of Ocean and Earth Sciences, University of Malaya, 50603 Kuala Lumpur, Malaysia;3. Department of Computer System and Technology, Faculty of Computer Science and Information Technology, University of Malaya, 50603 Kuala Lumpur, Malaysia;4. Faculty of Mechanical Engineering, Department for Mechatronics and Control, University of Nis, Aleksandra Medvedeva 14, 18000 Nis, Serbia;5. Faculty of Civil Engineering and Architecture, University of Nis, Aleksandra Medvedeva 14, 18000 Nis, Serbia |
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| Abstract: | The percentage weighting polygon (PWP) method is proposed as an alternative to the Thiessen method for calculating the average areal rainfall (AAR) over a given catchment area. The basis of the method is to divide the study area into subareas by considering the rainfall percentages obtained at three adjacent station locations. This method is more reliable and flexible than the Thiessen polygon procedure where the subareas remain the same, independent of the measured rainfall amounts. In this paper, the PWP method is applied to the Southeastern Anatolia Region of Turkey for the first time by considering 10 meteorological stations. In PWP method, higher rainfall values are represented with the smaller subareas than in the case of the Thiessen and the other conventional methods. It is observed that the PWP method yields 13.5% smaller AAR value among the other conventional methods. |
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