МОДУЛЬ ДРЕНАЖНОГО СТОКУ ЯК ВИЗНАЧАЛЬНИЙ ПОКАЗНИК ЕФЕКТИВНОЇ ДІЇ ДРЕНАЖУ

А. Рокочинський; П. Волк; Л.  Токар; О. Шевченко; В. Турченюк; Л. Волк

doi:10.17721/1728-2713.92.13

Authors

A. Rokochinskiy National University of Water and Environmental Engineering 11 Soborna Str., Rivne, 33000, Ukraine
P. Volk National University of Water and Environmental Engineering 11 Soborna Str., Rivne, 33000, Ukraine
L. Tokar National University of Water and Environmental Engineering 11 Soborna Str., Rivne, 33000, Ukraine
O. Shevchenko Ukrainian Hydrometeorological Institute NASof Ukraine, 37 Nauki Ave., Kyiv, 03028, Ukraine
V. Turchenyuk National University of Water and Environmental Engineering 11 Soborna Str., Rivne, 33000, Ukraine
L. Volk National University of Water and Environmental Engineering 11 Soborna Str., Rivne, 33000, Ukraine

DOI:

https://doi.org/10.17721/1728-2713.92.13

Keywords:

drainage module, distance between the drains, groundwater level, drainage norm, methods of data processing, factors, drainage efficiency

Abstract

Filtration calculations of drainage are a fundamental task of reclamation hydrogeology. They are necessary both during irrigation of lands (prevention of salinization) and during their drainage. The most important parameters of closed drainage, as the main means of regulating the level of groundwater and their runoff to water intakes, are the distance between the drains and the depth of drainage. These parameters depend on a combination of hydrogeological, climatic and relief-forming factors. Drainage degree of the territory is characterized by a drainage module. The value of the drainage module provides the water removing from the soil to the required drainage rate for a specified period and is one of the factors of the hydrological effect of the drainage. Existing equations for the calculation of distances between the drains are analyzed. Two methods of calculating agricultural drainage parameters are presented: a hydromechanical method based on theoretical principles of water movement in natural and technical systems and an empirical method based on the statistical data processing of field researches. These methods have both advantages and disadvantages. They include many factors of drainage parameters that represent the technical, economic and environmental effect of drainage. On the basis of the research results, a structural and logical scheme is presented. This scheme describes the influence of hydrological conditions (climatic, soil, relief) and the hydrological effect of drainage on drainage parameters of drained territories. To investigate the influence of variability of the main factors on the distance between the drains, we used the equation with DBN B.2.4-1-99. Also, we took into account the results of the researches of O.J. Oliynyk and A.I. Murashko. Methods of statistical modeling and methods of probability theory were also used. Based on these methods, mathematical models have been developed to determine the standard deviation of the function factor. The drainage module, which characterizes the intensity of soil and territory drainage, is formed by the value of drainage rate, filtration rate, and excess water drainage time. Also, the drainage module has a great influence on the distance between the drains (86 % ... 98 %). Based on the probabilistic method of estimating the drainage module, it is calculated that the distance between the drains can be increased by 1.10...1.23 times (probability of non-exceeding PU = 0.95...0.99) without reducing their efficiency.

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