Getis-Ord Gi* statistics for hydrocarbons content analysis in the Tromjegan river basin

https://doi.org/10.35595/2414-9179-2020-2-26-151-160

View or download the article (Rus)

About the Authors

Valentina A. Dobryakova

Tyumen State University,
Volodarskiy str., 6, 625003, Tyumen, Russia,
E-mail: v.a.dobryakova@utmn.ru

Natalya N. Moskvina

Tyumen State University,
Volodarskiy str., 6, 625003, Tyumen, Russia,
E-mail: n.n.moskvina@utmn.ru

Andrey B. Dobryakov

Tyumen Regional Division of the Ural Main Branch of the Central Bank of the Russian Federation,
Volodarskiy str., 48, 625000, Tyumen, Russia,
E-mail: dobryakov_andrey@mail.ru

Lilia F. Zhegalina

Immanuel Kant Baltic Federal University,
Proletarskaya str., 131, 236029, Kaliningrad, Russia,
E-mail: lzhegalina@kantiana.ru

Ildar R. Idrisov

Tyumen State University,
Volodarskiy str., 6, 625003, Tyumen, Russia,
E-mail: i.r.idrisov@utmn.ru

Abstract

The information content and effectiveness of ecological research of the territory can be improved using the methods of multivariate analysis and mapping of the results. The article presents the analysis and mapping results of spatial and temporal trends of hydrocarbon pollution in the Tromjegan river basin for the period 2006–2018 using the tools of ArcGIS Pro. The informational and basic research is the data of local environmental monitoring of licensed blocks of the Khanty-Mansiysk Autonomous Okrug — Ugra.

Pollution analysis was carried out on the basis of a detailed study of the geography of the source data using statistical calculations (minimum, average, maximum distances between sampling points, Getis-Ord Gi* index). Thematic maps were constructed using data averaged over the year. The spatial and temporal dynamics of hydrocarbons concentration in surface waters for 2006–2018 is analyzed using the “Hot Spot Analysis” tool. A temporary cluster section of hydrocarbons average annual concentration according to the Getis-Ord Gi* indicator allowed us to identify trends in the dynamics of indicators. Maps of hydrocarbons average annual concentration were compiled and the results of a spatial-temporal analysis of hydrocarbons average annual concentration in surface waters were presented.

The identification of patterns in large arrays of long-term data and the consideration of the spatial component are necessary elements of modern environmental research. Analysis of the time series of average annual concentrations in the Tromjegan river basin showed a clear trend in the dynamics of hydrocarbon pollution. The findings can be the basis for making managerial decisions in the environmental monitoring of licensed blocks of the Khanty-Mansiysk Autonomous Okrug — Ugra.

Keywords

Getis-Ord Gi* statistics, space-time analysis, GIS, analysis of hot spots genesis, hydrocarbon water pollution

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For citation: Dobryakova V.A., Moskvina N.N., Dobryakov A.B., Zhegalina L.F., Idrisov I.R. Getis-Ord Gi* statistics for hydrocarbons content analysis in the Tromjegan river basin InterCarto. InterGIS. GI support of sustainable development of territories: Proceedings of the International conference. Moscow: Moscow University Press, 2020. V. 26. Part 2. P. 151–160. DOI: 10.35595/2414-9179-2020-2-26-151-160 (In Russian)