Hydraulic characteristics and calculation of the innovative systems of surface runoff disposal

Summary

In the context of the intensive development of new domestic and foreign technologies, materials and equipment used to protect the environment from anthropogenic pollution, the development of advanced systems for surface runoff removal and treatment is of special actuality. These systems provide for using the latest achievements of the sectoral science and optimizing the algorithm for performing operations and practical methods for the hydraulic calculations. An example of the innovative surface runoff disposal system is ASO Qmax, that refers to an open system of channels for the collection and disposal of surface runoff formed during precipitation. However, the widespread use of these facilities in Russia is hampered by the lack of a method for the hydraulic calculations, including tables for the selection of cross-sections (diameters) of channels that meet the requirements of the Russian guidelines and regulations for the design of surface runoff disposal systems. In this regard, the subject of this paper is the estimation of the hydraulic characteristics of pipelines, channels of ASO Qmax drainage system. The results of theoretical and experimental studies of the hydraulic characteristics of ASO Qmax system with account of the adaptation for the Russian conditions and regulatory requirements, as well as the justification of the recommended parameters for their use are presented.

Key words

hydraulic design , surface runoff , canal , drainage system , experiment , method

Specific features of the static calculation of underground pipelines of gravity wastewater disposal systems

Summary

An essential pre-requisite for environmentally safe and reliable operation of underground pipelines of gravity wastewater disposal systems is specifying the requirements for the structural behavior of building construction elements (pipes, fittings) that are determined on the basis of a static calculation of the pipeline. In the process of the static analysis, direct and indirect loadings acting on the pipeline are determined and analyzed, and their impact on the structure is estimated. Existing approaches to performing a static analysis are considered. Based on the results of the studies carried out by Russian and foreign authors, it has been argued that the choice of the pipe parameters used in the construction of underground pipelines depends not only on the properties of structural materials, but primarily on the soil properties, conditions of laying and installation, as well as on the existing loadings and degree of pipeline deformation.

Key words

water disposal , underground pipeline , method , static calculation , trench , pipes , back filling

Expert and analytical assessment of the safety and risk
in analyzing the hazardous impact of techno-natural processes
on the facilities and environment

Summary

In accordance with the general provisions of the expert-analytical methodology for assessing the risk of hazardous impact of techno-natural processes of various origin on the facilities and environment, a method for calculating the risks of techno-natural processes is proposed. The method is based on a detailed analysis of research materials on the hazard level of processes and vulnerability of the facilities and environment, a quantitative assessment of the hazard level and degree of vulnerability, followed by the use of probit analysis to calculate the formation of risks. For the classification of safety and risk levels adopted for work, the criteria are determined and their values are defined that provide for assessing the levels of safety and risks of hazardous techno-natural processes of various origin. The proposed method for assessing the risks of techno-natural processes is illustrated by a more detailed study of the classification and assessment of the safety and risks of hydraulic engineering structures of different categories.

Key words

safety , risk , environment , hydraulic engineering structures , method , techno-natural process , опасность , vulnerability , quantitative evaluation , classification , изыскания