Moisture Accumulation Research Articles

Thermo-seismic performance of the novel thermal anchor pipe frame (TAPF) structure for supporting slope in earthquake-prone permafrost regions

The thermal anchor pipe frame (TAPF) structure is a new type of permafrost slope support technology, but its thermo-seismic characteristics are still unclear. In this paper, the coupled hydro-thermal-dynamic model of the thermal anchor pipe frame permafrost slope system is established. The cooling performance of the TAPF structure is investigated and the seismic responses are comparatively analyzed for different freeze-thaw periods. Results show that the presence of “elliptical” freezing cores with lower temperatures (which ranged from −3.94 to −5.36 °C) near the active layer at the end of the thawing period, which raised the permafrost table. The strip-shaped unfrozen moisture accumulation layer appears near the upper part of the thawing front at the highest temperature in the warm season. The peak acceleration response is the largest on October 15, 52.3% greater than the peak acceleration on April 15. The peak axial force of the thermal anchor pipe during the freezing period was 119 kN, which was 32.2% greater than that during the thawing period, and the peak total axial force after the earthquake appeared at the location of the freeze-thaw interface, and the axial force of the heat-transfer free section is greater than that of the anchored section. The frame structure is sensitive to earthquakes during the freezing period, and plastic bending damage may occur, especially at connection locations with thermal anchor pipes. Seasonal effects also have a strong influence on the shape of the acceleration response spectrum. The results can provide useful references for the maintenance and safe operation of permafrost slopes along the Qinghai-Tibet Project as well as for the seismic design of the new structure.

Photo-responsive polypropylene/zinc oxide/polydopamine-TEMPO composite membranes with light-induced self-sterilization

Face masks play a pivotal role in preventing infection transmission. However, the capture of infection-sourced particles in face masks poses challenges related to reuse, necessitating proper disposal. We developed a self-sterilizable polypropylene-based membrane for face masks to address challenges associated with infection transmission prevention. The membrane, created using 3D printing, underwent functionalization with zinc oxide (ZnO) and polydopamine (PDA)-TEMPO to achieve broad-spectrum light absorption and facilitate self-sterilization through photocatalytic and photothermal effects upon light exposure. The hydrophobic surface (water contact angle: 133 ± 2 °) minimized moisture accumulation, and the membrane exhibited robust mechanical properties, including shear strength (1.25 ± 0.5 kPa) and peel resistance strength (112.8 ± 11.2 kPa). The evaluation demonstrated stability in airflow (0 to 500 cm3/s) and excellent aerosol filtration efficiency (94.8 ± 0.6 %) for particles (PM 0.3, PM 2.5, PM 10), comparable to commercial masks. The membrane showed antibacterial efficacy over five uses in a simulated respiratory environment. Safety assessments confirmed biocompatibility through cytocompatibility and skin irritation assays. In conclusion, this membrane offers efficient filtration and photo-triggered sterilization, presenting a promising solution for next-generation face masks to address concerns related to reuse, disposal, and infection control.

The Dipole Mode of Summer Wet‐Bulb Temperature Over Eastern China and the Possible Mechanisms

AbstractOne prominent mode of the variability in the summer wet‐bulb temperature (WBT) over eastern China exhibits a distinct north‒south dipole pattern. This pattern demonstrates a positive center in northern China (NC), while a negative center is observed in southern China (SC). Our results indicate that the dipole mode of WBT could be partially ascribed to the impact of spring snow anomalies in eastern Europe–western Siberia (EEWS). The reduction in the snow depth, coupled with dry soil conditions, enhances the surface heat flux and consequently leads to an increase in the near‐surface air temperature. The signal of soil moisture could persist from spring to summer, stimulating the generation of zonal Rossby waves. Consequently, the significant wave flux anomalies propagate from EEWS downstream and influence the atmospheric circulation over eastern China. These patterns play a role in the increase in the surface air temperature and moisture accumulation over NC, ultimately leading to the establishment of the dipole mode of WBT over eastern China in summer. Further analysis indicates that the atypical low sea surface temperature in the tropical Ocean, induced by the El Niño‐Southern Oscillation, establishes a climatic context favorable for the persistence of an anomalous cyclone in the Northwest Pacific (NWP) throughout the summer season. The strengthened convection over the NWP and SC induces a dipole pattern of atmospheric circulation by stimulating a meridional wave train. This pattern creates favorable temperature and moisture conditions, contributing to the development of the dipole mode of the summer WBT across eastern China.

Assessing Conservation Conditions at La Fortaleza de Kuelap, Peru, Based on Integrated Close-Range Remote Sensing and Near-Surface Geophysics

We combined datasets from multiple research projects and remote sensing technologies to evaluate conservation conditions at La Fortaleza de Kuelap, a pre-Hispanic site in Peru that suffered significant damage under heavy seasonal rains in April 2022. To identify the causes of the collapse and where the monument is at further risk, we modeled surface hydrology using a DTM derived from drone LiDAR data, reconstructed a history of collapses, and calculated the volume of the most recent by fusing terrestrial LiDAR and photogrammetric datasets. In addition, we examined subsurface water accumulation with electrical resistivity, reconstructed the stratification of the monument with seismic refraction, and analyzed vegetation loss and ground moisture accumulation using satellite imagery. Our results point to rainwater infiltration as the most significant source of risk for La Fortaleza’s perimeter walls. Combined with other adverse natural conditions and contemporary conservation interventions, this led to the 2022 collapse. Specialists need to consider these factors when tasked with conserving monuments located in comparable high-altitude perhumid environments. This integration of analytical results demonstrates how multi-scalar and multi-instrumental approaches provide comprehensive and timely assessments of conservation needs.

Numerical Study on the Precipitation Concentration over the Western Coast of Sumatra Island

Abstract Large amounts of tropical precipitation have been observed as significantly concentrated over the western coast of Sumatra Island. In the present study, we used a cloud-resolving model to perform 14-day numerical simulations and reproduce the distinctive precipitation distributions over western Sumatra Island and adjacent areas. The control experiment, in which the warmer sea surface temperature (SST) near the coast was incorporated and the terminal velocity and effective radius of ice clouds were parameterized to be temperature dependent, adequately reproduced the precipitation concentration as well as the diurnal cycles of precipitation. We then used the column-integrated frozen moist static energy budget equation, which is virtually equivalent to the column-integrated moisture budget equation under the weak temperature gradient assumption, to formulate sensitivity experiments focusing on the effects of coastal SST and upper-level ice clouds. Analysis of the time-averaged fields revealed that the column-integrated moisture and precipitation in the coast were significantly reduced when a cooler coastal SST or larger ice cloud particle size was assumed. Based on the comparison of the sensitivity experiments and in situ observations, we speculate that ice clouds, which are exported from inland convection that is strictly regulated by solar radiation, promote the accumulation of moisture in the coastal region by mitigating radiative cooling. Together with the moisture and heat supplied by the warm ocean surface, they contribute to the large amounts of precipitation here.

Chisel Tillage Under Spring Barley in the Forest-Steppe

Abstract The degradation of chernozems and increased soil erosion led to the search for more advanced methods of tillage, taking into account climatic conditions, the quantity and quality of crop residues, and the volume of fertilizer application. The aim of the study was to establish the effect of various methods of basic tillage in the presence of preceding plant‘s crop residues on the growth and development of spring barley plants. The experiment was carried out in the forest-steppe of Ukraine. During the experiment, the influence of various methods of basic tillage on the agrophysical properties of the soil, its water regime, and weed infestation of spring barley crops was studied. For comparison, the following types of basic tillage were used: dump to a depth of 20–22 cm, chisel tillage to a depth of 14–16 cm, and disc tillage to a depth of 10–12 cm. Dump and chisel processing were characterized by higher grain yield. Chisel tillage provided better moisture accumulation compared to reverse ploughing. In spring, at the time of sowing grain crops in the layer of 0–15 cm, the reserves of productive moisture during chiselling were 145 mm, and during mouldboard processing 122.6 mm. Thus, chisel tillage for spring barley creates the best conditions for moisture supply and guarantees a high level of grain yield and significant profitability of production.

Study of hydrothermal processes in ice-layers subgrade under constant temperature and dynamic loading

The presence of ice-layers in the subgrade soils makes the hydrothermal state of road subgrade built in island permafrost regions more susceptible to external environmental influences. In order to deepen the study of the ice-layers subgrade, a hydrothermal study of subgrade under constant temperature and dynamic loading was carried out. It was found that dynamic loading can change the temperature, moisture and pore water pressure distribution. Under dynamic loading, the hydrothermal and pore water pressure state of the soil in the upper part of the ice layer changed significantly at the beginning of the test. The application of dynamic loads alters the spatial distribution of pore water pressure in the soil, resulting in pressure differences between different areas, which affects the migration of moisture and ultimately leads to the formation of areas with higher moisture content in the area below the load. However, the reduction in soil temperature will weaken the effect of the load, therefore, the temperature of the soil should be controlled for frozen subgrade with ice-layers to prevent the accumulation of moisture in the soil.

Development and experimental evaluation of new building air leakage measurement methods: measurement of interior air leaks and comparison to conventional methods

Building air leaks (both through exterior and interior surfaces) can have a significant impact on energy consumption, indoor air quality, fire safety, and moisture accumulation affecting structural durability. Blower door testing has been used to measure leaks in buildings, but commonly used testing methods do not directly measure interior leaks. In this paper, new testing methods (guarded interior test and zonal multipoint pressure testing method) are presented that directly measure these interior leaks, utilizing common blower door equipment for both single and multi-point testing. These new methods are compared to conventional methods in terms of the information provided, limitations and time/effort needed. In addition, building leak measurement results are analyzed to reveal (a) coupling between power law model values (exponent and coefficient) for an ensemble of buildings, (b) the error in using single point testing when estimating low pressure leakage, and (c) how building power law models vary from low to high pressure ranges.

Experimental Study on Seismic Performance of Partially Corroded Squat RC Shear Walls in Coastal Environment

In coastal environments, squat reinforced concrete (RC) shear walls are susceptible to local accumulation of moisture and chloride salts, causing local corrosion in the shear walls, which in turn affects their seismic performance. Four squat RC shear wall specimens were designed considering the corrosion locations and the heights of the corroded area. The seismic performance of partially corroded squat RC shear wall specimens was analyzed through a quasi-static test. The results show that as the height of the corroded area increases from 15% to 25% of the total height, the area of the hysteresis loop of the shear walls obviously decreases. As the height of the corroded area increases from 0 to 15% and 25% of the total height, the peak and ultimate displacements of shear walls are, respectively, reduced by 6.7% and 19.2% in the positive loading direction, and are, respectively, reduced by 22.3% and 18.3% in the negative loading direction. Compared with the unilateral corroded shear wall, the area of the hysteresis loop and the stiffness of the bilateral corroded shear wall remain approximately unchanged, and the peak and ultimate displacements, the shear strain, and the ratio of shear deformation to horizontal displacement are reduced. Compared with the uncorroded shear wall, the hysteresis loop of the unilateral corroded shear wall is plump, the displacement ductility ratio and the plastic rotation angle are both increased, and the stiffness degradation is relatively slow.

The effect of wheelchair cushion properties on the microclimate at the cushion-user interface: A systematic review and meta-analysis.

Pressure injuries are a preventable yet highly prevalent health concern. Wheelchair cushion prescription can have significant implications for wheelchair users' risk of pressure injury development, which can impact functional abilities and quality of life. The efficacy of a wheelchair cushion to redistribute pressure has been well-researched, but the efficacy to manage the microclimate is less clear, particularly in warm-hot environments. The aim of this study was to systematically review studies examining the effect of wheelchair cushions on temperature, moisture and thermal perception to determine which cushions are superior to improve these responses. A systematic review with meta-analyses of randomised cross-over and randomised control trials of wheelchair cushion interventions on measures of temperature, moisture, and thermal perception was conducted. Eight studies were identified that met the eligibility criteria and six meta-analyses were conducted. Pooled analyses identified a significantly lower temperature on foam-gel cushions compared to air cushions (MD = 0.80, 95% CI: 0.31, 1.29; p = 0.002) and a significantly lower temperature on foam-gel cushions compared to foam cushions (SMD = 0.76, 95%CI; 0.45, 1.06; p < 0.00001). Pooled analyses also demonstrated significantly lower relative humidity (i.e., moisture) on foam cushions compared to foam-gel cushions (p = 0.02). Differences in thermal perception were inconclusive due to limited data found. It is clear that not one cushion is ideal in managing all aspects of microclimate, as foam-gel cushions were the superior cushion to manage temperature and foam cushions were the superior cushion to manage moisture. This article provides occupational therapists and other health professionals with evidence-based information to assist with wheelchair cushion prescription that minimises the temperature and moisture accumulation, and associated risk of pressure injury for wheelchair users.

Developing a pharmaceutical fluid bed granulation & drying process via design of experiments based on a multivariate model

This manuscript presents a lean industrial workflow to establish an operating design space for a commercial scale fluid bed granulation and drying process. The workflow involves confirming the operating design space by demonstrating that the drug product critical quality attributes are met at the most extreme processing conditions within the granulation design space. This eliminates the need to execute a large experimental design, since any processing condition bound by the adequately demonstrated extreme conditions should also be acceptable, assuming linearity and continuity. A PLS (partial least squares) model was used to illustrate the multivariate relationship among the important process outputs and inputs (material properties and operating control variable settings). Since the moisture content of the fluidized bed influences granulation, the design space was evaluated based on the moisture accumulation and removal rates (output of the PLS models). The PLS model identified the specific experiments needed to confirm the operating design space. These specific experiments were executed, and the design space was confirmed experimentally. The PLS-model guided experimentation resulted in a lean experimental study while delivering a robust drug product manufacturing process.

Enhancing indoor comfort and building energy efficiency with cross-laminated timber (CLT) in hygrothermal environments

The hygrothermal behavior of a building is important because it directly influences indoor comfort levels and energy consumption. Hence, effective strategies must be implemented to minimize energy consumption while optimizing indoor conditions. This study analyzed indoor hygrothermal environments and energy consumption in scenarios related to passive and active building elements, such as exterior walls and indoor control temperature. A simulation considering hygrothermal behavior in walls and spaces was utilized, and the accuracy of the model was validated via an on-site test. Here, cross-laminated timber (CLT) walls, which have been proposed for their energy-saving potential, were substituted for conventional concrete walls. The application of CLT walls enhances indoor comfort better than concrete walls. Despite using the same CLT material, different wall layer compositions lead to internal moisture accumulation. Hence, it was determined that appropriate wall layer compositions should be selected based on regional climate conditions. Furthermore, although indoor comfort was ensured by varying indoor control temperatures, the energy consumption of the heating and cooling systems increased by up to 81 %. Despite the application of passive elements, an indoor heating temperature of 24 °C achieves an optimal balance between comfort and energy consumption. This temperature ensured a satisfactory indoor comfort level and facilitated a manageable increase in energy consumption. In summary, this study provides nuanced insights into the hygrothermal dynamics of buildings, emphasizing the demand for strategic materials, considering regional climates, and carefully managing indoor temperatures to strike an effective balance between comfort and energy efficiency.

Comparison of the Parameters of Thermal Comfort in a House Built With Green Bricks With a Conventional Construction

This project consists of the comparison of thermal comfort between a house made of green bricks and a construction made of conventional bricks. The green bricks are made of cement, water and soil and provide many benefits such as: material savings, reduced construction time , is easy to produce and can be done at the construction place and don’t consume fuel in the manufacture. At the structure of this bricks, have holes provides thermal and acoustic insulation, doesn’t allow the accumulation of moisture on the walls, facilitates the electrical and plumbing systems and promote the engagement of bricks , giving greater symmetry . It is intended to show and prove that this type of brick provides benefits for buildings. This project used the devices: thermometers with and without contact, anemometer, hygrometer and density meter solar power. With these equipaments are measured internal and external temperatures to buildings and bricks, wind speed, humidity and solar radiation intensity. The two buildings analyzed are located in the UNESP campus Guaratinguetá- Brazil. The results was positives, the green bricks provided the benefits mentioned above, showing that this type of construction can benefit society and the environment, encouraging their use.

MODELING OF AN AUTOMATIC CONTROL SYSTEM FOR SUBMERSIBLE PUMPS IN DRAINAGE WELLS IN THE MATLAB SOFTWARE ENVIRONMENT

The accumulation of moisture due to summer showers or due to sudden melting of snow can lead to deformation of the foundation of buildings, the appearance of cracks and deflections on it, as well as the release of harmful substances into the environment. Drainage systems, especially in urban infrastructure, play an important role in effectively treating wastewater and maintaining groundwater levels at safe levels. Automatic control of submersible pumps in such systems is critical to optimizing the drainage process and minimizing flood risks. This article develops a model of an automatic control system for submersible pumps in drainage wells, which includes components such as a drainage well, a drainage pipeline valve actuator, a pump and a level sensor. The model was created in the MatLab software environment using the Simulink application package, which made it possible to simulate and analyze the process of water entering a water collection well and its pumping out using a pump, as well as to study in detail how individual blocks of the system react to incoming water. The results of this work can be useful for engineers and designers working in the field of hydraulic engineering. They can use the model to optimize control systems and to predict and analyze the performance of drainage systems.

Quantification of maize brace root formation after vertical stalk displacement.

Maize brace roots develop from aboveground stem nodes in both upright and vertically displaced stalks. The cues that trigger brace root development after displacement are unknown. Possibilities include disturbance of the belowground roots, gravity, moisture, physical interaction, or node anatomical changes. We show that brace root formation occurs at all growth stages, with more nodes producing brace roots when plants are displaced at later growth stages. This occurs with the underground roots intact, without moisture accumulation and without physical interaction. We propose that the formation of brace roots after vertical stalk displacement is most likely due to gravity or anatomical changes at the node.

Tillage techniques in grass crop rotations in Western Kazakhstan

The transition to new technologies is predetermined by global and domestic scientific and production experience and general trends in the development of agriculture. The basis of grass crop rotations is the general biological principle of the different effects of perennial grasses on the soil. To the problem of forage production for the conditions of the arid steppe of Western Kazakhstan with an annual rainfall of 250-300 mm, a method of using forage crops based on grass crop rotation is proposed. Periodic change of different crops in crop rotation plays a positive phytosanitary role in clearing the soil of weeds. The article discusses three types of soil cultivation techniques based on the principles of sustainable production of grain crops and stabilization of soil fertility in the conditions of Western Kazakhstan. The research was carried out on the basis of the Ural Agricultural Experimental Station LLP. The purpose of the research is to develop methods of soil cultivation in grass crop rotations for the accumulation, conservation and rational use of soil moisture in resource-saving technologies for cultivating basic field crops, ensuring the preservation of soil fertility, improving the phytosanitary condition of crops in the dry steppe zone of Western Kazakhstan. The objective of the research is to study the influence of methods for processing turf of perennial grasses in the structure of crop rotations in order to stabilize soil fertility and the phytosanitary condition of crops. Three types of processing were used in the studies: flat cutter, slotting + cultivation, cultivation. Grass crop rotation was sown over a layer of perennial grasses and included the following forage crops: sorghum, corn and millet. The best results in terms of yield were observed based on the joint interaction of technologies for factor B (slotting + cultivation).

Modernized tilling unit

It is noted in the work that the increase in the efficiency of agricultural production in our time is not possible without reducing energy costs. At the same time, the technical means of mechanization of the tillage process have a high material consumption, which leads to an increase in energy consumption, indicating energy and environmental problems. In an effort to improve the quality of soil preparation, expand the functionality of the unit, reduce energy consumption, simplify design and import substitution, the use of known tillage tools has been studied and analyzed. As a result, on the basis of exploratory research, a modernized tillage unit has been developed. The new elements of which are that a chopper module is mounted behind the disk module, consisting of staggered chopper rollers in two rows. The modernized tillage unit considered in the article, developed on the basis of KubGAU, improves the quality indicators of soil cultivation, on which the effective accumulation and consumption of soil moisture depends, reduces energy consumption by increasing the functionality of the unit.

Soil cultivation in the context of climate change and its technical support

Annotation Purpose. Based on the generalization of modern technologies for managing plant nutrition and soil health, to formulate requirements for technical means for soil cultivation in the context of climate change. Methods. Monographic, system analysis, theoretical generalization, abstract and logical. Results. The agrotechnical requirements for the quality of technological operations for soil cultivation in the conditions of climate change to ensure sustainable environmentally responsible production of agricultural products are determined. The analysis of modern technologies for managing plant nutrition and soil health and their technical support is carried out. It has been established that one of the promising areas of greening soil cultivation technologies is vertical tillage, which creates favorable conditions for the accumulation and use of moisture in the soil and reduces the removal of weed seeds from the lower horizons to the surface. The requirements for the technical support of soil cultivation in Ukraine, the use of which in the context of climate change will help to reduce the anthropogenic load on the soil and its physical degradation, are outlined. Conclusions. Mechanical tillage is an important technological operation because in the process of interaction of working bodies with the soil environment, the physical state of the soil changes. The working bodies of tillage tools interacting with the soil should not allow its spraying and compaction in the seedbed should be at least 60 % of soil aggregates with a size of 10 mm to 0.25 mm. In the context of climate change, the paradigm for the development of tillage equipment should be to harmonise the interaction of working tools with the soil, which can be achieved through the automation of their operating modes. To implement energy-saving tillage technologies in the context of climate change, scientists of the Institute of Mechanics and Automatics of Agroindustrial Production of the National Academy of Agrarian Sciences of Ukraine in cooperation with specialists of plant «Krasnyansky JV «AGROMASH» have created and established industrial production of a complex of energy-efficient tillage equipment, including vertical tillage technology. Keywords: climate change, physical soil degradation, soil cultivation, requirements of agricultural technology, ecologization, technical support.

Analysis of flow field and temperature distribution in granary under novel ventilation systems based on fractal structure

The distribution of velocity and temperature field inside the granary can be used to evaluate ventilation quality. A well-ventilated system with uniform air-flow and cooling can effectively prevent moisture accumulation. To address the issue of poor uniformity in ventilation and cooling, this research introduces two new ventilation systems: the non-fractal ventilation system and the fractal ventilation system. The fractal structure was designed based on optimized parameters obtained from rectangular elements with minimum flow resistance. Numerical simulation methods were employed to verify the effectiveness of these ventilation systems. A comparative analysis was conducted, examining the velocity field, temperature field, and velocity uniformity of the two systems. The results demonstrated that the presence of a sand packing zone helped the grain pile zone avoid most of the areas with poor ventilation. The discontinuous pores at the interface between the sand packing zone and the grain pile zone significantly increased flow resistance, effectively reducing the velocity of high speed ventilation into the grain pile zone and decreasing the permeability of the grain pile zone towards the poorly ventilated areas of the sand pile zone. Furthermore, the fractal structure greatly enhanced ventilation intensity in areas with poor ventilation in the velocity field, while also improving the uniformity of cooling in the temperature field. This research presents an innovative solution for ventilation in room-type warehouses, offering a new option for effective and efficient ventilation.

The influence of long-term dynamics of groundwater levels on the winter redistribution of moisture in arable soils of the Ishim steppe

The aim of the study was to establish the influence of long-term dynamics of the groundwater level on the winter redistribution of moisture in arable soils of the Ishim steppe. Location and time of the study. The Ishim-Irtysh steppe interfluve (Ishim steppe, Russia), 1986–1989 and 2002–2024. Methods. Soil samples were collected during soil-hydrological field observations from the reference pits of arable soils. The soil and subsoil moisture content was determined by thermostat-weighing /in samples collected in the pre-winter period (the second - third decades of October) and at the end of the winter season (the third decade of March). The depth of the groundwater table was measured in the hand-drilled simultaneous with soil sampling for moisture measurement. The layer of cryogenic accumulation and the freezing moisture volume were determined by comparing moisture profiles in mid-October and in the third decade of March. Snow surveying was carried out in the third decade of March. The penetration depth of 0°C temperature was determined using exhaust thermometers. Results. Within the upland areas, during the second half of the 20th century the aquifer rose from various depths to the levels above the critical level. The economic activity was the main reason for the rise. In the early decades of the 21th century, as the groundwater table was above the critical depth, the groundwater level in summer and autumn began to be predetermined by the amounts of precipitation over the previous cold season of the year. The peculiarities of the winter redistribution of moisture in arable soils were found to be largely determined by the depth of groundwater in the autumn season. If in the upland soils the groundwater table was located in autumn at a depth of more than 4 m, which was typical for the 1980s, a layer of cryogenic moisture accumulation was formed below the horizons of intense and complete desuctive drying for spring grain crops, from a depth of 0.8 m. The moisture freezing volume did not exceed 30 mm. Migrated moisture practically did not participate in replenishing the post-vegetation moisture deficit in the upper 1-meter-thick layer of soil. If the groundwater in the second and third decades of October was detected at a depth of less than 4 m, which is typical for upland areas in the 21st century, a layer of cryogenic accumulation can be traced from a depth of 0.4–0.8 m, the volume of freezing moisture can reach 50 mm, and 25 mm in the top 1-meter layer. The frozen moisture in the top meter layer helps reducing the post-vegetation deficit, but promotes conditions for anaerobiosis in the second half-meter soil layer and acts as an “island of cold,” delaying the soil warming in spring to active temperatures. In soils with negative relief forms, the groundwater level during the period of field survey exceeded the critical level. Therefore, specifics of winter moisture profile redistribution in were similar to the established characteristics of this phenomenon in upland soils during the current millennium. Conclusions. The groundwater level in the soil and subsoils of the Ishim steppe uplands showed long-term dynamics under the influence of anthropogenic as well as natural factors over the past twenty years. The autumn depth of the groundwater table determines specifics of winter moisture redistribution in the arable soils of plakors: the higher the level, the greater the amount of moisture freezing is fixed, and the closer the cryogenic accumulation layer is located to the daytime surface.