Spatial Estimation of Precipitation Based on Spatial Characteristics and PRISM Framework in Sefidroud Basin

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ZANDI O.; ZAHRAIE B.; NASSERI M.

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Paper Information

Journal: IRAN-WATER RESOURCES RESEARCH Year:2020 | Volume:16 | Issue:4 Page(s): 268-283

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Information Journal Paper

Title

Spatial Estimation of Precipitation Based on Spatial Characteristics and PRISM Framework in Sefidroud Basin

Author(s)

ZANDI O. | ZAHRAIE B. | NASSERI M. | Issue Writer Certificate

Keywords

Spatial Interpolation of PrecipitationQ1

Genetic AlgorithmQ2

Inverse distance weightedQ1

Sefidroud WatershedQ1

KrigingQ2

Abstract

Accurate spatial estimation of precipitation plays a key role in many hydrological modelling, water resources planning and agricultural management studies. In order to estimate high-resolution precipitation in the current research, an estimation model based on PRISM framework considering Digital Elevation Model (DEM) and other spatial attributes is developed and applied to Sefidroud basin during the years 2000-2015. In the first step, the monthly results were compared with modified Inverse distance weighted (IDW) as a benchmark method. Considering both models’ degrees of freedom, the parameters are calibrated with Genetic Algorithm in annual time scale and the obtained parameters are utilized to estimate model monthly cross validation error. According to the monthly results, both models had roughly same statistical performance in estimating precipitation at the selected rain gauges. In spite of similar statistical performance of the models, the spatial distribution of precipitation provided by the PRISM based method is more consistent with topographic pattern and existing evidences. In the next step the proposed model’ s ability to estimate mean monthly precipitation is compared with ordinary Kriging method and according to the results, in wet months the developed model and in dry months Kriging method represents more optimal results. According to small amount of summer precipitation, PRISM based approach is considered to be a better tool for Spatial Interpolation of Precipitation than Kriging.

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APA: Copy

ZANDI, O., ZAHRAIE, B., & NASSERI, M.. (2020). Spatial Estimation of Precipitation Based on Spatial Characteristics and PRISM Framework in Sefidroud Basin. IRAN-WATER RESOURCES RESEARCH, 16(4 ), 268-283. SID. https://sid.ir/paper/396541/en

Vancouver: Copy

ZANDI O., ZAHRAIE B., NASSERI M.. Spatial Estimation of Precipitation Based on Spatial Characteristics and PRISM Framework in Sefidroud Basin. IRAN-WATER RESOURCES RESEARCH[Internet]. 2020;16(4 ):268-283. Available from: https://sid.ir/paper/396541/en

IEEE: Copy

O. ZANDI, B. ZAHRAIE, and M. NASSERI, “Spatial Estimation of Precipitation Based on Spatial Characteristics and PRISM Framework in Sefidroud Basin,” IRAN-WATER RESOURCES RESEARCH, vol. 16, no. 4 , pp. 268–283, 2020, [Online]. Available: https://sid.ir/paper/396541/en

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