Assessment of the forests growth potential in Iraqi Kurdistan based on the analysis of hydro meteorological data
https://doi.org/10.21266/2079-4304.2024.249.38-54
Abstract
It was found that the CVP and HTC indices, which determine the potential productivity of vegetation cover, including forests, in the studied area, have high annual variability for all the considered districts. The average coefficients of variation of the CVP and HTC indices are 38.5 and 48.4%, respectively. The study of changes in indices over the years showed the presence of a linear trend towards their increase over the period under study. The tendency to increase the CVP index is more pronounced. The graphs of index changes showed the presence of significant random fluctuations (deviations) of indices from trends. The random nature of the fluctuations was verified using a median test. To calculate the potential growth of forests based on the literature data, an equation was obtained for the relationship between the growth rate and the CVP index with a high coefficient of determination equal to 94.5%. Using this equation, calculations of the potential growth of wood volume for all areas in the study area were carried out. Calculations have shown that as a result of the high variability of the CVP and HTC indices over the years of the studied period (1995-2021), the potential productivity of forests in the studied area is on average 0.7 m3/ha-year. In favorable years, the maximum growth values can reach 1.5 m3/ha-year, and in unfavorable years, the increase can fall to zero, thus putting woody vegetation on the brink of survival. A direct proportional relationship has been established between the values of the CVP and HTC indices with a determination coefficient of 86.0% for the studied territory, which allows using one index instead of the other if necessary. In general, the hydrothermal conditions for forest growth in the Erbil region area should be assessed as unfavorable.
Keywords
About the Authors
Avla Hardy Kakakhan AwlaRussian Federation
Awla Hardy Kakakhan Awla - PhD student of the Department of Forest Inventory, Management and Geoinformation Systems St. Petersburg State Forest Technical University.
Institute per. 5, St. Petersburg, 194021
A. S. Alekseev
Russian Federation
Aleksandr S. Alekseev - DSc (Geography), Professor, Head of the Department of Forest Inventory, Management and Geographical Information Systems, St. Petersburg State Forest Technical University.
Institute per. 5, St. Petersburg, 194021
Web of Science Researcher ID F-6891-2010, Scopus Author ID 55892224800
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Review
For citations:
Awla A.H., Alekseev A.S. Assessment of the forests growth potential in Iraqi Kurdistan based on the analysis of hydro meteorological data. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2024;(249):38-54. (In Russ.) https://doi.org/10.21266/2079-4304.2024.249.38-54