Analysis of Irrigated Salt-Affected Soils in the Central Fergana Valley, Uzbekistan, Using Landsat 8 and Sentinel-2 Satellite Images, Laboratory Studies, and Spectral Index-Based Approaches

Kholdorov, Shovkat; Gopakumar, Lakshmi; Jabbarov, Zafarjon; Yamaguchi, T.; Yamashita, Masahiro; Samatov, N.; Katsura, Keisuke

doi:10.1134/s1064229323600185

Cited by 6 publications

(1 citation statement)

References 26 publications

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“…The NDSI calculations were based on the spectral information derived from the green and Shortwave Infrared (SWIR) bands of Landsat 8 imagery (Poussin, Timoner, Chatenoux, Giuliani, & Peduzzi, 2023). Specifically, Band 3 was employed to represent the green band, while Band 6 represented the SWIR band within the Landsat 8 dataset (Kholdorov et al, 2023). The NDSI was computed using the formula:…”

Section: Data Analysis 231 Normalized Difference Snow Index (Ndsi)mentioning

confidence: 99%

Global warming and Ice Nucleation in Central Himalayas: A Case Study of Skardu District

Khan,

Ahmed,

Qamar

et al. 2023

Pak. J. Humanit. Soc. Sci

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Water is an essential need for life and demand for water supply is exponentially increasing with elevating human population. Ice nucleation plays a fundamental role in shaping precipitation patterns and influencing the Earth's climate system. Skardu's unique location amidst the Karakorum. As temperatures decrease, there is a noticeable increase in stream water and ice melt water, potentially impacting biological activity and ecological processes. Following Vali’s equation and finding number of frozen drops from -1 to -10 degree Celsius after 5 mints incubation at each degree. The correlation between temperature and frozen drops adds complexity, highlighting the heightened sensitivity of environmental phenomena to temperature variations, with frozen drops peaking at extremely low temperatures. Ice nucleation results at Skardu showed that stream water can maximize IN 17.5 times from its starting point of freezing points while ice melt water increased 9 times, sediments 5 times. Biotic factors of plant 1 and plant 2 showed 25 times and 24 times increase in IN from starting point of freezing. Result of IN at Shigari showed, stream water increased 9.5 times, ICM increased 9 times, sediment 4 times, plant 21 times and plant 2 showed 23.5 times from their first freezing happened. Cold desert, IN results showed that stream water increased 11 times, ICM 19 times, sediments 4 times, plant-1 25 times and plant-2 24.5 times increased in IN from their first freezing point.

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Section: Data Analysis 231 Normalized Difference Snow Index (Ndsi)mentioning

confidence: 99%

Global warming and Ice Nucleation in Central Himalayas: A Case Study of Skardu District

Khan,

Ahmed,

Qamar

et al. 2023

Pak. J. Humanit. Soc. Sci

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Study on the soil pollution condition around the domestic wastewater

Jabbarov,

Atoyeva,

Sayitov

et al. 2024

E3S Web Conf.

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The rapid development in the population of the earth, the increase in the level of consumption of people leads to an increase in the amount of household waste from year to year, which, in turn, increases the negative impact on the environment of their collection and storage areas, that is, household waste landfills. From these studies, the state of contamination of the soil as scattered around the municipal landfill, the sources factors affecting the contamination were described. The main purpose of the conducted research is to determine the level of pollution of the soil under the influence of household waste. The researches were conducted in the soil scattered around the Tashkent municipal waste dump, located in the Ohangaron district were of the Tashkent province. The results showed that in the chemical pollution of irrigated typical gray soils, the domestic landfill is considered the main pollutant source, and the level of pollution decreases from the distance of 1.2 km from the landfill, and into according to the soil layers, it decreases uniformly from the top to the bottom, starting from the 70 cm layer.The soil scattered around the landfill is contaminated with organic pollutants, ash elements and heavy metals and other pollutants, including the total amount of Cd 3.1 times, As 4.39 times, Sb 2.46 times compared to the permissible limit share. , W 4.6 times and other heavy metals increased to different degrees.

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Effects of pollution of saline soils with oil and oil products on soil physical properties

Jabbarov,

Nomozov,

Kenjaev

et al. 2024

E3S Web Conf.

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In the article, pollution of saline soils with oil and oil products, physical and water-physical properties depending on the level of salinity are studied. As a result of the research, it is scientifically based that the increase in the level of contamination of the soil is subject to the decrease in water permeability, and the decrease in the level of pollution is subject to the law of the increase in water permeability. In the article, weakly, moderately, strongly and very strongly contaminated soils with oil were studied. According to the results, it was determined that the water permeability of the soil was observed in 25, 45, 45, 37, 5, 3, 2 minutes, and it carried 75, 26, 44, 45, 540, 1050, 1200 ml of water, respectively, for 90 minutes. The amount of water transfer compared to the control soil for 90 minutes was less in 1%, 2%, 5% contaminated soils, and very high in 15%, 25% and 37.5% contaminated soils. The increase in the level of pollution is explained by the deterioration of water permeability and moisture retention. Also, due to the fact that oil is a viscous organic pollutant, the changes of 0.25, 0.5, 1, 3, 5, 7, 10 mm microaggregates, which are important for soil fertility, as a result of pollution, and changes in the amount of these microaggregates were also determined. It was found that the soils around the South Mirshodi oil field were previously contaminated and the amount of microaggregates smaller than 0.25 mm, 0.25 mm, 1 mm, 2 mm and 3 mm in the irrigated soils increased as the distance from the source of contamination increased. This is explained by the decrease in the concentration of oil in the soil. The amount of 5 mm, 7 mm and 10 mm aggregates has decreased. A similar situation was observed around the Kumkurgan oil base. The effect of petroleum hydrocarbons is more noticeable in microaggregates with a diameter of 10 mm.

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Analysis of Irrigated Salt-Affected Soils in the Central Fergana Valley, Uzbekistan, Using Landsat 8 and Sentinel-2 Satellite Images, Laboratory Studies, and Spectral Index-Based Approaches

Cited by 6 publications

References 26 publications

Global warming and Ice Nucleation in Central Himalayas: A Case Study of Skardu District

Global warming and Ice Nucleation in Central Himalayas: A Case Study of Skardu District

Study on the soil pollution condition around the domestic wastewater

Effects of pollution of saline soils with oil and oil products on soil physical properties

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