Document Type : Original Article

Authors

• neda mousavi kojabad ¹
• amir sedghi saman ²
• mehdi moradi ³

¹ univercity tabriz

² Master's student in remote sensing and geographic information system, Tabriz University

³ Doctoral student of geomorphology, environmental management orientation, Tabriz University

Abstract

One of the important issues in water resources management is the estimation of rainfall in areas where pregnancy has not been done. Due to the lack of complete coverage of the rain measuring stations, it is necessary to estimate the rainfall in the areas between the stations. . Estimation of unknown data at different points is done using interpolation methods on the measured data in the studied area. For this purpose, different methods are used to analyze spatial dataIn this research, a variety of common methods of interpolation and geostatistics have been used to estimate the average annual rainfall parameter of Chahar Mahal and Bakhtiari province. The statistics used are the statistics of 44 rain gauge stations for the period from 1980 to 2008. . Due to the extreme changes in the topography of the study area, the effect of altitude on the distribution of precipitation as a barrier against the spread of clouds has also been investigated. For this purpose, interpolation was calculated with various models and a prediction map was drawn. Then, using the mutual evaluation method, the square root of the errors and the error of the maps were estimated and one map was selected as the appropriate map The obtained results show that for the interpolation of the average annual rainfall methods that considered the heights as obstaclesThey show higher accuracies in the studied area, among which the fourth and fifth degree polynomial models showed the most suitable information for interpolation of average annual rainfall values

Keywords

• Key words: interpolation
• geostatistics
• rainfall
• Chaharmahal and Bakhtiari

Main Subjects

• Remote sensing and Gis