A5019049911- Soil and Unsaturated Flow
- Advanced Scientific Techniques and Applications
- Soil Moisture and Remote Sensing
- Irrigation Practices and Water Management
- Engineering and Agricultural Innovations
- Scientific Research Methodologies and Applications
- Plant Water Relations and Carbon Dynamics
- Groundwater flow and contamination studies
- Climate change and permafrost
- Environmental Sustainability and Technology
- Soil Carbon and Nitrogen Dynamics
- Landslides and related hazards
- Geophysical and Geoelectrical Methods
- Soil Geostatistics and Mapping
- Agricultural Productivity and Crop Improvement
- Geotechnical and Geomechanical Engineering
- Soil and Environmental Studies
- Agriculture and Biological Studies
Peter the Great St. Petersburg Polytechnic University
2017-2022
A description of five mathematical models the water-retention capacity soil is given, taking into account hysteresis phenomena. computational experiment was carried out with these using data on sandy soil. The consisted of: (i) tuning (parameter identification) by method dot-approximation experimental main drying and wetting branches loop an optimizing algorithm; (ii) predictive calculation scanning loop; (iii) a comparison errors in results Williams-Kloot criteria. commensurate sufficiently...
A mathematical model of the hysteresis water-retention capacity soil is proposed. The parameters are interpreted within framework physical concepts structure and capillary properties pores. On basis model, a computer program with an interface that allows for dialogue user developed. has some options: visualization experimental data; identification use measured data by means optimizing algorithm; graphical presentation loop application assigned parameters. Using program, computational...
The problem of flood protection measures are considered in the paper. regulation river flow by system Self-Regulated Flood Dams (SRFD) is analyzed. method SRFD modeling GIS environment proposed. question ecological aspect management based on hydrophysical properties soil. improved Mualem-Van Genuchted proposed for evaluation possible location influence soil flooded territory – temporary reservoirs. importance and utility complex stated.
The relevance of the study is closely related to urgent demands society for development technologies that allow saving water resources, as well agrochemicals when cultivating agricultural crops on irrigated lands. goal outlined by authors fill in missing ideas about physical nature interactions solid and liquid phases soil hydraulic functions, such its moisture conductivity. subject most important patterns control water-physical properties soil. research method mathematical modelling. work...
At substantiating land amelioration and management designs, as well during periods of operation reconstruction water facilities, information support plays an important role in relation to the hydrophysical properties soil. Effective implementation this faces a number challenges. Such problems include very high laboriousness carrying out corresponding engineering surveys laboratory studies. In regard, methods indirect estimating properties, measurement which requires considerable labor, are...
Abstract A method is proposed to calculate water irrigation rates for crops that considers hysteresis in the volumetric content ( θ )-water pressure head ψ ) relations, including scanning paths, by of point approximation. Three θ(ψ) models are described and computational experiments were carried out using data from literary sources on hydrophysical properties soils with different textures. The error analysis approximation main branches predictive calculation loop out. practical significance...
The relevance of the study is determined by demand for a physically adequate mathematical description interactions water in soil to develop model moisture dynamics as intellectual core resource-saving technologies precise irrigation farming. aim work theoretical substantiation and formulation hydrophysical functions soil, taking into account hysteresis. A three systems given. To verify compare systems, computational experiments were carried out using both package original software “3305 Ida...
A functional description of the hydrophysical properties soil as a capillary-porous medium is presented. The described functions water retention capacity and hydraulic conductivity have common parameters, which are interpreted within framework physical statistical concepts. practical significance proposed lies in fact that volume labor-intensive field measurements necessary, for example, modeling dynamics moisture, significantly reduced. To identify parameters these functions, it sufficient...
Abstract The value of the fractal dimension soil structure is usually calculated by geometric method based on particle size distributions. There a hope to express soil-hydrophysical functions through pore space found in some more direct, simple and physically independent way.
Abstract The most important of the hydrophysical properties is water-retention capacity soil. This property formulated as a relationship between volumetric moisture soil and capillary pressure moisture. Three hysteresis models are presented. parameters were identified by point approximation experimental data (from an authoritative literary source) on main (boundary) drying wetting branches «2003 Silt Nave-Yaar» using «SoilHysteresis-v.1.0» computer program developed authors. Applying...
Abstract Three systems of functions are used to describe the water-retention capacity and ratio hydraulic conductivity soil moisture filtration coefficient (relative soil). Each three uses an appropriate set parameters. These parameters common each pair that make up corresponding system. The first system formal in nature Mualem-Van Genuchten method. second third have a physics-statistical interpretation. main purpose considered is predictively evaluate values relative function using...