ASSESING THE ACCURACY OF THE SNOW-RAIN PHASE SEPARATION MODELS FOR METEOROLOGICAL WEATHER STATIONS OF THE MOUNTAINOUS REGION OF ZAGROS, IRAN

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RAZIEI T.; JAHANBAKHSH ASL S.; PARANDEH KHOUZANI A.; SARI SARAF B.

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Journal: IRAN-WATER RESOURCES RESEARCH Year:2018 | Volume:14 | Issue:3 Page(s): 85-102

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Title

ASSESING THE ACCURACY OF THE SNOW-RAIN PHASE SEPARATION MODELS FOR METEOROLOGICAL WEATHER STATIONS OF THE MOUNTAINOUS REGION OF ZAGROS, IRAN

Author(s)

RAZIEI T. | JAHANBAKHSH ASL S. | PARANDEH KHOUZANI A. | SARI SARAF B. | Issue Writer Certificate

Keywords

SNOW-RAIN PHASE SEPARATIONQ1

SNOW-RAIN PHASE TEMPERATURE THRESHOLDQ1

SNOWFALL TEMPERATURE RANGEQ1

SNOW DEPTH PREDICTIONQ1

SNOW MELT MODELSQ1

Abstract

In this study, the possibility of snow estimation using the SNOW-RAIN PHASE SEPARATION models which usually is integrated into the snowmelt models or in the numerical weather prediction (NWP) models are evaluated for the Zagros region, Iran. For this purpose, daily precipitation (rain and snow) and temperature data from 36 weather stations distributed over Zagros having data records over the period 1951-2015 is used. The performances of the SNOW-RAIN PHASE SEPARATION models in accurately predicting the phase of precipitation at the studied stations were evaluated through constructing contingency tables between predictions and observations, and eventually evaluating the results using a set of statistical skill scores. A statistically significant relationship was found between the phase of precipitation predicted by the models and the snow occurrences observed at all selected stations. The USACE, Pipes and Quick, Hyperbolic tangent function and Kienzle were found as the best models, while the Mccabe and Wolock model and the Brown model resulted in the weaker predictions based on the maximum and minimum temperature. The snow-rain separation temperature threshold at the selected stations varied from-1. 7 to 5 degree Celsius, nonetheless, between 0 and 2 degree Celsius in more than 75% of the stations. It was also found that the temperature range within which both snow and rain can occur simultaneously varies among stations, but in most of the stations it is between 9 and 13 degrees Celsius.

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APA: Copy

RAZIEI, T., JAHANBAKHSH ASL, S., PARANDEH KHOUZANI, A., & SARI SARAF, B.. (2018). ASSESING THE ACCURACY OF THE SNOW-RAIN PHASE SEPARATION MODELS FOR METEOROLOGICAL WEATHER STATIONS OF THE MOUNTAINOUS REGION OF ZAGROS, IRAN. IRAN-WATER RESOURCES RESEARCH, 14(3 ), 85-102. SID. https://sid.ir/paper/100440/en

Vancouver: Copy

RAZIEI T., JAHANBAKHSH ASL S., PARANDEH KHOUZANI A., SARI SARAF B.. ASSESING THE ACCURACY OF THE SNOW-RAIN PHASE SEPARATION MODELS FOR METEOROLOGICAL WEATHER STATIONS OF THE MOUNTAINOUS REGION OF ZAGROS, IRAN. IRAN-WATER RESOURCES RESEARCH[Internet]. 2018;14(3 ):85-102. Available from: https://sid.ir/paper/100440/en

IEEE: Copy

T. RAZIEI, S. JAHANBAKHSH ASL, A. PARANDEH KHOUZANI, and B. SARI SARAF, “ASSESING THE ACCURACY OF THE SNOW-RAIN PHASE SEPARATION MODELS FOR METEOROLOGICAL WEATHER STATIONS OF THE MOUNTAINOUS REGION OF ZAGROS, IRAN,” IRAN-WATER RESOURCES RESEARCH, vol. 14, no. 3 , pp. 85–102, 2018, [Online]. Available: https://sid.ir/paper/100440/en

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