Methods and technologies for spatial analysis of regional ecosystems based on the watershed approach

Ерунова, Марина Г.; Yakubailik, Oleg

doi:10.1002/ieam.4652

Cited by 3 publications

(3 citation statements)

References 39 publications

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“…This approach offers a hydrological system defined sampling transect where the spatio-temporal variability of petroleum contamination is better captured for the assessment of current contamination levels and the monitoring of subsequent petroleum removal processes, ecological status and other restoration indicators (Erunova & Yakubailik, 2023 ; Wei et al, 2023 ).…”

Section: Resultsmentioning

confidence: 99%

Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment

Ola,

Drebenstedt,

Burgess

et al. 2024

Environ Monit Assess

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The Niger Delta in Nigeria is a complex and heavily contaminated area with over 150,000 interconnected contaminated sites. This intricate issue is compounded by the region’s strong hydrological processes and high-energy environment, necessitating a science-based approach for effective contamination assessment and management. This study introduces the concept of sub-catchment contamination assessment and management, providing an overarching perspective rather than addressing each site individually. A description of the sub-catchment delineation process using the digital elevation model data from an impacted area within the Delta is provided. Additionally, the contamination status from the delineated sub-catchment is reported. Sediment, surface water and groundwater samples from the sub-catchment were analyzed for total petroleum hydrocarbons (TPH) and polycyclic aromatic hydrocarbons (PAHs), respectively. Surface sediment TPH concentrations ranged from 129 to 20,600 mg/kg, with subsurface (2-m depth) concentrations from 15.5 to 729 mg/kg. PAHs in surface and subsurface sediment reached 9.55 mg/kg and 0.46 mg/kg, respectively. Surface water exhibited TPH concentrations from 10 to 620 mg/L, while PAHs ranged from below detection limits to 1 mg/L. Groundwater TPH concentrations spanned 3 to 473 mg/L, with total PAHs varying from below detection limits to 0.28 mg/L. These elevated TPH and PAH levels indicate extensive petroleum contamination in the investigated sediment and water environment. Along with severe impacts on large areas of mangroves and wetlands, comparison of TPH and PAH concentrations with sediment and water quality criteria found 54 to 100% of stations demonstrated exceedances, suggesting adverse biological effects on aquatic and sediment biota are likely occurring.

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Section: Resultsmentioning

confidence: 99%

Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment

Ola,

Drebenstedt,

Burgess

et al. 2024

Environ Monit Assess

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“…Cluster Analysis (CA) assembles objects based on their characteristics and contains a group of multivariate techniques whose primary purpose is to find out objects' common features [36]. Cluster analysis classifies objects based on similarity among them based on a predetermined selection criterion.…”

Section: Regionalization Methodsmentioning

confidence: 99%

Regional Flood Frequency Analysis of Northern Iran

Adhami

2024

DEUFMD

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The combination of the L-moment approach and multiple regression offers an attractive solution to provide flood estimation at ungauged sites within the Gorganrood and Ghare-sou river basins in the north of Iran. This research has two main goals including regionalization by cluster analysis and regional estimation of flood quantile at the site of interest. After data analysis regarding climatic and hydrologic data series, hierarchical approach was carried out to identify homogeneous regions. The homogeneity test was done by H-Statistic, a testing method based on L-moments. The results showed that a subdivision of selected watersheds into homogenous groups is necessary; therefore, two homogenous regions were formed. In the present study, five three-parameter distributions were fitted to the homogeneous regions and the best-fit one was identified using the L-moments approach. The results of the goodness-of-fit analysis for the two regions introduced the Generalized Pareto (GPA) distribution for both regions as acceptably close fits to the regional average L-moments. Besides, multiple regression was applied to diagnose the effective independent parameters on discharge value. The results reported percent of permeable formations, average annual precipitation, and stream slope as the most effective variables.

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“…Vast areas cannot be monitored without using satellite remote sensing methods. In a study by Erunova and Yakubailik (2022) included in this special series, spatial analysis and mathematical modeling were applied to assess the state of four river watersheds in Eastern Siberia with a total area of approximately 9 million ha. A detailed multilevel hierarchical system of watershed delineation based on natural characteristics of the territory was created and used for further analysis of the satellite data.…”

mentioning

confidence: 99%

Introduction to the Special Series “Environmental Monitoring on Global and Local Scales”

Зотина

Kudryasheva

Soukhovolsky

2023

Integr Envir Assess & Manag

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This article is part of the special series "Environmental Monitoring on Global and Local Scales." The series documents cases of the current state of environmental assessment and tracking using different approaches: in situ monitoring, geoinformation modeling, and risk-based assessment. The work was originally presented at the conference "Ecological Monitoring: Methods and Approaches," held September 2021 in Krasnoyarsk, Russia, and co-organized with the European and Russian-Language Branches of Society of Environmental Toxicology and Chemistry.

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Methods and technologies for spatial analysis of regional ecosystems based on the watershed approach

Cited by 3 publications

References 39 publications

Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment

Assessing petroleum contamination in parts of the Niger Delta based on a sub-catchment delineated field assessment

Regional Flood Frequency Analysis of Northern Iran

Introduction to the Special Series “Environmental Monitoring on Global and Local Scales”

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