Abstract: The concepts of anthromes and human appropriation of net primary production (HANPP) are both valuable in understanding our human-dominated planet, yet they have never been integrated theoretically or empirically. Here we utilize an extensive county-level dataset on HANPP and its product-level components to derive, through cluster analysis, ten contemporary US anthromes. From highest to lowest density of harvested HANPP, the anthromes are: Rainfed Corn-Soy, Dairy Fodder, Spring Wheat-Small Grain, Winter Wheat-Sorghum and Corn-Soy Dry Margin, Subtropical Soy-Cotton, Commercial Timber, Mixed Hardwood and Pasture, Recovered Eastern Forest, Prairie-Sagebrush Rangeland, and Arid and Alpine Sparse Grazing. Expanding to thirteen anthromes maintains these, while bifurcating the commercial timber (softwood, hardwood), rainfed corn-soy (core, fringe) and mixed hardwood and pasture anthromes. Cluster analysis was more successful than hierarchical modeling at producing empirically meaningful anthromes.

Abstract: The accumulation of agricultural waste poses significant agronomic and environmental challenges in tropical smallholder farming systems where organic wastes are still underutilized. This study evaluated the effectiveness of vermicomposting with Eisenia fetida to enhance nutrient recovery and the quality of organic fertilizers generated from agricultural waste. Four substrate treatments—cow dung, chicken manure, and vegetable waste (T2), cow dung and vegetable waste (T3), poultry manure and vegetable waste (T1), and a control group free of earthworms (T4)—were assessed during 60 days. Bulk density, pH, electrical conductivity, organic carbon, total nitrogen, accessible phosphorus and potassium, and the C: N ratio were among the significant physicochemical properties that were investigated. Vermicomposting significantly increased the nutritional content; the C: N ratio decreased from 26.43 (control) to 12.23, suggesting improved compost maturity, and T2 contained the greatest quantities of potassium (1.45%), phosphorus (1.21%), and total nitrogen (2.63%). Another sign of improved mineralization efficiency was a significant decrease in organic carbon during the decomposition phase. Vermicomposting improved nutrient availability, compost maturity, and structural quality in comparison to traditional composting. These results show that vermicomposting is a successful resource recovery technique that increases nutrient availability, improves resource efficiency, supports sustainable and climate-resilient agricultural systems, and turns agricultural waste into useful organic fertilizer.

Abstract: The immature stages and biology of Neoplinthus tigratus porculus (Fabricius, 1801) (Coleoptera: Curculionidae: Molytinae) associated with common hop (Humulus lupulus L.) are described for the first time. Morphology and diagnostic characters of mature larvae and pupae are documented and compared with related Molytinae and selected Cleonini (Lixinae). The mature larva generally fits the diagnostic characters of Molytinae larvae but differs in several traits, particularly the very short endocranial line and the relative length of frontal setae, with fs4 distinctly shorter than fs5. Together with the presence of five frontal setae, this combination represents useful characters for distinguishing the species. The larva and pupa are covered with cuticular asperities. Biological observations show that the species develops mainly within the root collar and roots of Humulus lupulus, where larvae feed internally and older instars overwinter. Infested plants are characterized by swollen and weakened roots, often containing multiple larvae.

Abstract: Ammonia volatilization after nitrogen fertilization represents a major pathway of reactive nitrogen loss in cropping systems, reducing nitrogen use efficiency and contributing to environmental impacts. This review analyses fertilizer-based strategies to mitigate these losses from a mechanistic perspective, focusing on the processes governing ammonia formation and emission under field conditions. Approaches such as urease inhibition, pH regulation, ammonium retention, and controlled-release formulations are examined in relation to their effects on hydrolysis, chemical equilibria, and mass transfer. Evidence from field studies and meta-analyses shows strong variability in mitigation performance across soils, climates, and management practices, indicating a high dependence on local conditions. The analysis also identifies trade-offs between nitrogen loss pathways, where reductions in ammonia emissions may influence nitrous oxide emissions or nitrate leaching. A process-based framework is proposed to guide the selection of mitigation strategies according to dominant loss mechanisms, supporting more efficient and con-text-specific nitrogen management in cropping systems.

Abstract: Climate warming is reshaping hydrothermal resource allocation worldwide, thereby altering the spatial suitability patterns of rice under different cropping systems. Using the maximum entropy model (MaxEnt), this study characterizes the climatic niche features of four typical rice cropping systems in China—single-season rice, double-season rice, rice–wheat rotation, and rice–maize rotation—based on occurrence points and climatic variables, and evaluates changes in their potential suitable areas during 2081–2100 under the SSP2-4.5 and SSP5-8.5 scenarios. The results show marked differences in the dominant factors controlling the four systems. Single-season rice and rice–maize rotation are mainly constrained by heat accumulation, whereas the suitability boundary of double-season rice is jointly limited by extreme temperature thresholds and precipitation conditions. Rice–wheat rotation is more sensitive to annual temperature range, reflecting its dependence on the seasonal rhythm of cold winters and hot summers. Under future climate scenarios, the potential suitable areas of all four systems generally shift northward and expand eastward, with stronger changes under SSP5-8.5. Suitability increases in parts of Northeast and North China, suggesting theoretical potential for the development of double-cropping systems in these regions, whereas some traditional double-season rice areas in South China may face declining suitability because of increasing high-temperature risk. These findings provide a reference for adjusting cropping systems and enhancing regional adaptation under climate change.

Abstract: Measurements assessing how micrometeorological conditions—driven by the proximity of large buildings—influence PM_2.5 levels were conducted in an urban commune of Santiago, Chile, during the winter and spring seasons. This commune is characterized by a mixture of one story houses and high-rise building. These large building may have an influence on the air quality because they alter wind circulation or lower the temperature due to the shadow of the building. In this work, PM_2.5 and meteorological parameters were measured outside three pairs of houses in winter of 2021, one of which received shadow from a nearby building and the other was under the sun. In one pair, PM_2.5 was larger in the house located under the shadow of the building only during the winter months, the result was attributed to the lower temperature generated by the shadow, which inhibited PM_2.5 dispersion. In another pair of houses, the result was attributed to the difference in wind speed in one of the houses, because the building acts as a windbreak. In the third pair of houses no effect was observed in PM_2.5, this is probably due to the lack of significant micrometeorological differences between the two sites.

Abstract: Rationale: Safe drinking water is essential for human health, yet bacterial contamination remains a pervasive challenge in resource-limited settings. In the Niger Delta region of Nigeria, aging infrastructure, environmental degradation, and inadequate water quality monitoring contribute to persistent waterborne disease burden. However, no prior study has systematically characterized and compared bacterial contamination in both institutional tap water and informal vended water (Meruwa) in this region, leaving critical evidence gaps for policy and intervention. Objectives: This study aimed to: (i) assess the presence, types, and levels of bacterial contamination in tap water from Bayelsa State College of Health Technology and vended water from Ogbia Main Town; (ii) compare contamination levels and bacterial species distribution between the two water sources; (iii) evaluate compliance with World Health Organization (WHO) drinking water standards; and (iv) provide evidence-based recommendations for water safety interventions. Methods: A total of 47 water samples were analyzed, 23 tap water samples from six campus points and 24 vended water samples from vendors in Ogbia Main Town. Total bacterial counts (TBC) and total coliform counts (TCC) were determined using the plate count method on nutrient agar and MacConkey agar, respectively. Bacterial isolates were identified through Gram staining and biochemical characterization (catalase, coagulase, oxidase, citrate, urease, indole, Kligler iron agar, motility). Compliance was assessed against WHO guidelines (0 CFU/100 mL for coliforms; <500 CFU/mL for heterotrophic bacteria). Results: All samples exceeded WHO standards. Tap water TBC ranged from 3.50 × 10⁶ to 5.00 × 10⁶ CFU/mL (mean 4.32 × 10⁶), and TCC ranged from 3.00 × 10⁶ to 3.80 × 10⁶ CFU/mL (mean 3.21 × 10⁶). Vended water TBC ranged from 3.50 × 10⁶ to 5.30 × 10⁶ CFU/mL (mean 4.24 × 10⁶), and TCC ranged from 3.00 × 10⁶ to 4.00 × 10⁶ CFU/mL (mean 3.21 × 10⁶). No significant difference was observed between water sources for TBC (p = 0.642) or TCC (p = 0.981). Bacterial isolates from tap water included Escherichia coli (28.0%), Staphylococcus aureus (28.0%), Pseudomonas aeruginosa (20.0%), Klebsiella pneumoniae (12.0%), and Enterobacter aerogenes (12.0%). Vended water isolates comprised E. coli (33.3%), Salmonella typhi (25.0%), K. pneumoniae (20.8%), and Citrobacter freundii (20.8%). Species distribution differed significantly between sources (χ² = 24.18, p = 0.0005). Compliance with WHO microbial standards was 0% for both water sources. Conclusion: Institutional tap water and vended water in the study area are universally and heavily contaminated with faecal and opportunistic pathogens, including S. typhi. Both water sources pose substantial health risks, and the widespread assumption that vended water is safer is unfounded. Recommendation: Immediate implementation of routine microbial monitoring, mandatory water treatment for both sources, vendor certification, and targeted hygiene interventions is essential to prevent waterborne disease outbreaks and protect public health. Thus, consumption of untreated water from either source carries risks of acute gastroenteritis, typhoid fever, and opportunistic infections, with particular vulnerability among children, the elderly, and immunocompromised individuals, representing a preventable public health crisis that demands urgent multisectoral action.

Abstract: Biofouling presents numerous challenges across various sectors, including aquaculture, agriculture, infrastructure, and medicine. The development of anti-biofouling techniques remains a significant challenge. In the water industry, biofouling on monitoring sensors substantially compromises the accuracy of measurements by interfering with sensors measuring ability. Biofouling also significantly increases the running costs by increasing the frequency of maintenance needed to keep sensors clean and accurate. Consequently, anti-biofouling techniques are widely employed to clean in-situ optical sensors, ensuring accurate measurements while minimizing overall system costs. The conventional approach for preventing biofouling from in-situ sensors typically involves the application of coatings, mechanical brushes, ultraviolet radiation, and ultrasonic waves, which possess distinct advantages and disadvantages contingent upon their application. The challenges associated with protecting the small windows of water quality sensors from biofouling over extended periods using current methods are either expensive or adversely affect the integrity of monitoring data. This study introduces a low-cost centimeter-scale high-frequency surface acoustic wave (SAW) device to protect the small windows of in-situ water quality sensors continuously from biofouling, functioning as an auxiliary anti-biofouling mechanism. The study found that this 16 MHz SAW device can mitigate the formation of biofilms by adhesive diatom strains CS-1664, CS-1665, and by planktonic algae CS-327 by approximately 95-99% in comparison to control conditions, functioning effectively as an anti-biofouling tool for itself and surrounding surfaces without adversely affecting aquatic organisms. The dimension and resonance frequency (RF) of the SAW device are also capable of being fabricated according to the area requiring cleaning. A miniaturized 16 MHz SAW device can sustain operation for prolonged periods up to a couple of months without maintenance, at a low cost and power consumption, providing a new anti-biofouling technology. This methodology aims to assist the Australian inland and coastal water quality monitoring system by reducing maintenance costs while simultaneously enhancing the longevity of sensors submerged in water for extended periods.

Abstract: Storage of livestock effluents represents a major source of ammonia (NH₃) emissions to the atmosphere. Therefore, identifying efficient and sustainable mitigation strategies is crucial. Conventional floating covers are commonly used to reduce emissions; however, they often present limitations in terms of management, durability, and cost. This study proposes a novel approach by comparing traditional floating cover materials like natural crust, straw, and light expanded clay with biochar as an innovative mitigation strategy to reduce ammonia volatilization from the liquid fraction of buffalo digestate obtained from an anaerobic digestion plant in southern Italy. All cover materials were applied at a uniform thickness of 2 cm under laboratory conditions using a dynamic chamber technique. Additionally, a cost analysis was performed considering the material purchase cost for an average storage tank of 700 m² and two hypothetical reduction efficiencies (50% and 70%). Results indicated that biochar was the most effective cover, achieving a 67% reduction in ammonia emissions compared with the natural crust. Light expanded clay exhibited the lowest efficiency, likely due to its insufficient sealing capacity at the applied thickness. From an economic perspective, biochar becomes increasingly competitive when emission reduction efficiency is accounted for, owing to its favorable physical–chemical properties. Further research is recommended to evaluate the long-term durability of biochar as a cover material and to investigate potential synergistic effects when applied later as a soil amendment.

Abstract: This study focused on the bioremediation of soils contaminated with heavy metals from volcanic ash deposition. To this end, composts made from organic waste generated in the areas affected by this contamination, such as crop residues, cow manure, and cheese whey, were used. The design and optimization of the composting process for these wastes are described. Adding cheese whey only affected the rate of organic matter degradation and the salt content of the final composts, without negatively affecting the stability and humification of their organic matter or their plant nutrient content. The effectiveness of the composts obtained in the soil remediation was evaluated by assessing the physiological response of a lettuce crop in pots. Five treatments were used: control soil without fertilization (C), inorganic fertilization (IF), and the three composts obtained (without whey, compost 1 (C1F); with whey diluted with water (1:2 (v:v), compost 2 (C2F); and with undiluted whey, compost 3 (C3F)). The main agronomic properties of the soil and heavy metal availability were measured, along with the physiological and chemical parameters of the lettuce, including growth and macronutrient and heavy metal content. All soils with compost improved soil fertility and reduced Ni, As, Cd, and Pb availability compared to the control and inorganic fertilization treatments. Nevertheless, compost 3 was the most effective in lettuce yield and promoting this crop’s macronutrient uptake. There was no relationship between reduced heavy metal availability in the soil with composts and the assimilability of these elements by lettuce, especially for As with the C2F treatment and Cd and Cr with C2F and C3F. This physiological response in lettuce shows that applying agro-livestock composts with and without whey is a partial solution for remediating soils contaminated by volcanic ash. It is advisable to adjust the compost application rate and optimize crop selection to minimize the impact of heavy metals on the food chain, thereby ensuring safe production.

Abstract: Ilex guayusa is a culturally significant Amazonian plant cultivated in traditional chakra agroforestry systems. Processing generates substantial residues with potential valorization opportunities. This study quantified and characterized guayusa processing residues from Kallari cooperative (Napo, Ecuador) to identify circular economy applications. Residues were separated by particle size (425 µm, 300 µm, < 300 µm) and analyzed for 20 replicates measuring density, pH, conductivity, moisture, ash, organic matter, fiber, protein, fat, total phe-nols, tannins, caffeine, and thermal properties. Granulometric analysis revealed 67.50 ± 0.94% coarse fraction (>425 µm), 11.94 ± 0.49% intermediate (300–425 µm), and 20.56 ± 0.91% fine (< 300 µm), indicating 32.5% potential rejection. Fine residues showed mean density 0.27 g/cm³, pH 5.85, moisture 6.22%, high organic matter (92.37%), protein (1.61%), fat (6.78%), total phenols (15.70 units), tannins (9.41 units), and caffeine (1.89–2.09%). No significant differences were found between coarse and fine fractions for 12 parameters (p > 0.05). Guayusa residues retain 55–70% of caffeine and substantial phenolic compounds compared to whole leaves, demonstrating potential for food ingredient applications, functional product development, nutraceutical extracts, and bioenergy generation within circular bioeconomy models.

Abstract: Background: Cephalosporins, widely used β-lactam antibiotics, are becoming significant environmental pollutants primarily due to their high use and persistence. They are released into the environment mainly through wastewater treatment plants, agricultural runoff, and hospital discharge, with particularly high concentrations recorded in effluents. Conventional wastewater treatment methods have inadequate removal efficiency, while advanced treatments, although more efficient, may produce toxic by-products. Recent studies emphasize the importance of improved detection and monitoring techniques and advocate for stricter effluent regulations. Methods: The search strategy used the SCOPUS and PUBMED databases with the keywords “cephalosporin” AND “aquatic environment”, resulting in 341 records. The final review synthesized the findings from 110 papers, highlighting the presence of cephalosporins in various aquatic habitats and laboratory settings. Results: The literature on cephalosporins in aquatic environments has expanded significantly from 1978 to 2025, prompted by concerns about pharmaceutical contamination and antibiotic resistance. Studies from 2016 to 2025 used advanced and multidisciplinary monitoring techniques, revealed key pollution sources such as wastewater treatment plants and hospitals, and correlated antibiotic residues with resistance genes, highlighting the need for continued monitoring and mitigation efforts. Conclusion: The literature has noted an increasing focus on cephalosporins in aquatic environments, with results indicating links between antibiotic residues and resistance genes. Ecotoxicological assessments show negative effects on aquatic organisms, highlighting that degradation processes may lead to the formation of more toxic compounds. This analysis calls for an integrated monitoring approach and further research to address the ecological and health impacts of cephalosporin pollution.

Abstract: Major sports infrastructure investments represent significant commitments of public and private capital, yet their spatial accessibility — the degree to which surrounding communities can physically access the venue — remains inadequately quantified in the urban planning literature. This study presents a geospatial analysis of the Allegiant Stadium in Las Vegas, Nevada, examining the spatial distribution of 517 towns across the state relative to the stadium using geodesic distance computation. The analysis employs a Geographic Information System (GIS) pipeline utilizing U.S. Census Bureau shapefiles processed with the GeoPandas library, coordinate reference system transformation from NAD 1983 Albers to WGS84, and geodesic distance calculation via the Geopy library's WGS84 ellipsoid model. Results reveal a highly uneven accessibility distribution, with 20 towns located within 26 kilometers of the stadium — predominantly in the Las Vegas metropolitan area — while rural communities in northern Nevada are situated over 500 kilometers away. Distance-based heatmap and bar chart visualizations illustrate the concentration of accessible communities and the sharp accessibility gradient across the state. The findings contribute to the growing literature on infrastructure accessibility assessment and provide a reproducible methodological framework applicable to spatial analysis of major infrastructure projects in urban and regional planning contexts. The methodology demonstrates the practical utility of open-source geospatial tools for quantifying the catchment area and regional reach of large-scale public amenities.

Abstract: Intensive agriculture, deforestation, and frequent land-use changes contribute to in-creased soil erosion and sediment transport from both arable and non-arable lands into minor river channels. These factors directly and indirectly influence riverbank erosion and, in turn, sediment transport in rivers. Evidence on anthropogenic land-use/land-cover (LULC) change impact remains limited in both quantitative and spatial terms within the Danube River Basin. The results based on the combination of LU-LC products derived from the Copernicus satellite (year 2000 vs. year 2018) and validated in the field by UAV flights (year 2025) indicate that land conversion from ri-parian vegetation to cultivated or uncultivated lands reduces the root cohesion and soil–bank structural stability, thus increasing sediment sediment delivery to the river channel through overland flow, and favors bank failure where agriculture is in the immediate vicinity of the banks. The workflow proposed in this study offers a transferable and adaptable solution for areas with similar characteristics for a multitemporal approach regarding the influence of especially agricultural lands on sediment transport and riverbank erosion.

Abstract: Spatial and temporal variability of macrozoobenthic communities were assessed around three newly deployed gas structures in the NW Adriatic Sea (a subsea well-site, a four-leg platform, and a one-leg platform). Four post-installation surveys (two per year over two years) were conducted by sampling sediments at 0, 30, 60, 120 and 1000 m from each structure. All structures showed significant temporal shifts and distance-related differences in community composition. Near-field stations (0-60 m) most frequently accounted for spatial dissimilarities, whereas communities at 120 and 1000 m were generally more similar. Early surveys around the well-site and the four-leg platform were characterised by low diversity and high dominance of the opportunistic polychaete Ditrupa arietina, suggesting a short-term disturbance related to installation. Recovery trajectories differed among structures: community descriptors stabilized faster around the subsea well-site, while changes near the platforms extended for at least two years; at the one-leg and four-leg platforms the progressive development of a bivalve mound coincided with a marked differentiation of the benthos at 0 m. Overall, our results highlight that both structural complexity and local environmental settings modulate the spatial footprint and recovery time of benthic communities around offshore installations, supporting a case-by-case approach in decommissioning planning.

Abstract: Accurate estimation of residential building energy consumption and energy-related carbon emissions is essential for supporting urban low-carbon development. This study proposes a hybrid modelling framework that integrates physics-based simulation and machine learning to estimate residential building energy use in Shenzhen for 2020. Representative building archetypes are simulated, and the results are used to train machine learning models for large-scale application. A bottom-up inventory combined with spatial-proxy-based downscaling is further employed to generate high spatiotemporal resolution maps of carbon emissions. Results show that the model achieves strong estimation performance across multiple scales. Daily mean temperature is the dominant driver of energy-use variability, while building type significantly influences consumption levels. Residential energy use is generally higher on weekends than weekdays. Spatially, emissions are concentrated in central and western districts, with Longgang having the highest emissions (11.19 Mt), followed by Bao’an, Longhua, and Nanshan. High-emission buildings are mainly located along road-adjacent areas. The proposed framework provides a robust and scalable approach for fine-resolution CO₂ emission estimation and supports accurate emission source attribution for urban carbon management.

Abstract: With the dual goals of carbon peaking and carbon neutrality, hydrogen energy has become a key strategic direction for Shanxi’s energy transformation. Clarifying the carbon emission characteristics and mitigation potential of typical hydrogen production routes is critical for guiding the low-carbon development of the local hydrogen industry. This study adopts a unified life cycle assessment (LCA) framework to analyze five representative hydrogen production routes in Shanxi. The results reveal significant differences in carbon intensity across routes: large-scale integrated coal gasification hydrogen production(LICGHP, 10.02 kg CO₂e/kg-H₂) > commercial coal gasification hydrogen production(CCGHP, 9.35 kg CO₂e/kg-H₂) > photovoltaic hydrogen production(PHP, 6.17 kg CO₂e/kg-H₂) > coke oven gas hydrogen production(COGHP, 3.83 kg CO₂e/kg-H₂) > wind power hydrogen production(WPHP, 1.57 kg CO₂e/kg-H₂). Coal-based routes are dominated by operational phase emissions, while renewable energy routes concentrate emissions in the construction phase with near-zero operational emissions. COGHP (61.78% mitigation rate) serves as a high-quality transitional pathway, and WPHP (84.33% mitigation rate) represents the optimal low-carbon option. Mitigation strategies vary by route: coal-based routes prioritize CCS and process optimization, while renewable energy routes focus on supply chain decarbonization and green construction. These findings provide scientific support for Shanxi’s hydrogen energy technology selection and low-carbon strategy formulation.

Abstract: Many national climate policies coexist with a persistent gap between stated temperature goals and observed emissions trends, creating a demand for transparent and comparable tools to evaluate policy effectiveness. However, widely used climate-policy ratings differ in scope, indicator design, time coverage, and scoring scales, often producing inconsistent country assessments and complicating evidence-based decision-making. This paper proposes an integrated protocol for cross-index assessment of national climate-policy effectiveness. We combine a comparative analysis and a SWOT analysis of four representative approaches - the Climate Change Performance Index (CCPI), Climate Action Tracker (CAT), the Climate Laws, Institutions and Measures Index (CLIMI), and the Climate Policy Measure Index (CPMI) - with a pilot inter-index consistency test using correlation analysis for a small country sample. The pilot indicates strong alignment among broad, composite approaches (CCPI, CAT, CLIMI), while an instrument-focused metric (CPMI, centered on carbon-pricing and fiscal signals) shows weaker consistency with outcome- and gov-ernance-oriented ratings. Building on these insights, we compile an integrated indicator set that links outcomes (GHG levels and trends), structural drivers (energy mix, efficiency), policy in-struments (pricing, regulation, subsidies), governance capacity (legal and institutional strength), and enabling conditions (finance, public engagement, international cooperation). The proposed protocol is intended as a decision-support framework to reconcile discrepancies across existing indices and to structure multidimensional evaluations; limitations of the pilot analysis motivate a larger-sample validation and harmonization of index time frames in future work.

Abstract: This article addresses a pressing issue—the study of ecological and geodynamic conditions in the southern part of the Karakalpakstan Ustyurt plateau. This region, characterized by its harsh and challenging environment, remains insufficiently and unevenly studied. The article synthesizes and systematizes the findings from both archival and personal research on the current state of ecological and geodynamic conditions. A schematic map of ecological-geodynamic conditions has been developed to assess the manifestation of various processes and their impact on the region's flora and fauna, as well as on engineering and geological conditions relevant to mineral development and human economic activities. The primary criteria for evaluation include the state of the landscape, soil-grounds, and soil-forming rocks. The ecosystem serves as a nutrient base for plants and a fodder base for livestock development. The preservation and fertility of these elements are central to assessing the environmental conditions of the southern part of the Karakalpakstan Ustyurt. This study aims to provide a comprehensive understanding of the region's ecological dynamics, contributing to sustainable development and conservation efforts.

Abstract:

Colmation phenomena play a critical role in long-term gas flow through porous media, significantly influencing methane migration, mine ventilation efficiency, and emission control in both active and abandoned coal mines. In colmation modeling, three fundamental kinetic types are commonly distinguished, with the third kinetic providing a generalized nonlinear formulation capable of describing state-dependent and spatially variable permeability degradation. However, the strong nonlinearity of the coupled transport–colmation equations prevents the derivation of closed-form solutions, which necessitates the application of linearization techniques. In this study, gas flow with colmation governed by third-kinetics is analyzed with particular emphasis on methane migration in underground mining environments. Linearization of nonlinear kinetic terms is applied at the level of the coupled mass balance and colmation equations, resulting in an approximate form of Darcy’s law and an explicit analytical solution describing the evolution of the porous medium state. The primary objective of the study is to quantify the error introduced by the adopted linearization and to analyze its spatial and temporal propagation with respect to the nonlinear reference solution. A rigorous error estimation based on Taylor series truncation is developed, yielding an explicit criterion that defines the validity range of the linearized solution. The results demonstrate that the approximation remains reliable within the regime of weak colmation, while the associated error is locally generated and propagates through transport mechanisms without exhibiting uncontrolled growth.