Study of Drought Catchment Hendijan-Jarahee using geostatistics

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DARGAHIAN FATEMEH; Lotfinasabasl Sakineh; KHOSROSHAHI MOHAMMAD

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Journal Paper

Paper Information

Journal: Geographical Planning of Space Year:2020 | Volume:10 | Issue:37 Page(s): 14-28

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Title

Study of Drought Catchment Hendijan-Jarahee using geostatistics

Author(s)

DARGAHIAN FATEMEH | Lotfinasabasl Sakineh | KHOSROSHAHI MOHAMMAD | Issue Writer Certificate

Keywords

Geostatistics

Catchment

Hendijan-jarahi

Drought Index

Abstract

In this study to assess and identify the characteristics of the basin drought Hendijan-jarahi is used statistics a climatic period (30years). To determine the best indicator of drought in a correlation matrix using Pearson correlation coefficient values of PN, DI, SPI, SZI, CZI, MCZI with a confidence level of 99% and 95% review and were compared. Indices SPI, SZI, CZI together had a strong correlation more than 0. 9. the SPI Drought Index among them have ability to better identify the start and end time of drought, and based on the drought division into 4 groups: mild, moderate, severe and extreme. based on SPI index five characteristics of the drought were extracted; many with years of drought, the longest continuity, number of events, the years and the frequency of extreme events. In order to normalize the data of the method was applied Cox box. Among the deterministic and geostatistical interpolation methods according to the spatial dependence data Ordinary kriging was used. Then, to examine the spatial correlation between measurement data and assessment methods of estimation and modeling, drawing and analysis of semi-variograms were used Based on different methods, spherical, exponential and Gaussian features vario gram on the basis of Nagget and Sill, the variance structured to non-structured Proportion, the Mean, RMS, ASE RMSS, a suitable method was chosen for zoning. The results based on the five characteristics of the study due to the large difference topography and variety of terrain and other natural and climatic diversity, characteristics of drought in the basin does not follow of a certain order. But overall abundant number of years with the drought and the highest occurrence of severe drought are more than half of its eastern extreme in the West basin that most have occurred in recent decades.

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APA: Copy

DARGAHIAN, FATEMEH, Lotfinasabasl, Sakineh, & KHOSROSHAHI, MOHAMMAD. (2020). Study of Drought Catchment Hendijan-Jarahee using geostatistics. GEOGRAPHICAL PLANING OF SPACE, 10(37 ), 14-28. SID. https://sid.ir/paper/970695/en

Vancouver: Copy

DARGAHIAN FATEMEH, Lotfinasabasl Sakineh, KHOSROSHAHI MOHAMMAD. Study of Drought Catchment Hendijan-Jarahee using geostatistics. GEOGRAPHICAL PLANING OF SPACE[Internet]. 2020;10(37 ):14-28. Available from: https://sid.ir/paper/970695/en

IEEE: Copy

FATEMEH DARGAHIAN, Sakineh Lotfinasabasl, and MOHAMMAD KHOSROSHAHI, “Study of Drought Catchment Hendijan-Jarahee using geostatistics,” GEOGRAPHICAL PLANING OF SPACE, vol. 10, no. 37 , pp. 14–28, 2020, [Online]. Available: https://sid.ir/paper/970695/en

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