ANALYSIS OF INFILTRATION WATER INTAKES PRODUCTIVITY

Abstract

Purpose. Construction of new and reconstruction of existing water supply systems, in order to increase water consumption, provides for the search and analysis of water supply new sources and water intake facilities. This issue acquires particular importance when looking for additional power sources for water supply systems with relatively low water consumption. To reduce the load on wastewater treatment plants that process water from open sources, infiltration intakes are used, which take water from underground aquifers. Infiltration water intakes can be vertical and consist of wells united by prefabricated pipelines or horizontal and have an underground horizontal water intake part − a drainage pipe. Therefore, the problem arises of determining the water intake that has the highest productivity under the same local conditions. Methodology. The productivity of water intakes is characterized by the influence of determining factors on the flow rate of water intakes with one-way feeding in a free-flow aquifer. The conditions of the location of the intake parts of the intakes in the aquifer and their sizes were considered as factors of influence. Results. The analysis of the existing methods for determining the productivity of underground infiltration water intake structures, depending on their location, the influence of water supply sources and design features. It has been determined that the greatest impact on the productivity of water intakes is the amount of water level decrease in the aquifer during water withdrawal, that is, the position of the dynamic water level relative to the static one. Also, the distance from the intake structure to the water's edge has a significant impact. Reducing the distance between the wells and the length of the drainage pipe, within the limits of the study conditions, has no effect on the results. As a result of the research, it has been established that, under the adopted hydrogeological and technical conditions, horizontal underground water intakes are distinguished by a large flow rate. Scientific novelty. The analysis of factors influencing the choice of infiltration water intake structures is carried out. The results of determining the productivity of structures under the same initial conditions are shown. Practical value. Using the results of the analysis allows you to most quickly and effectively solve the issues of choosing the option for powering water supply systems. The analysis has identified the most significant factors influencing the productivity of water intakes and makes it possible to vary them to achieve a result.