Development of Model for Assessing the Level of Multipurpose Water Use and Protection by Economic-Mathematical Modeling

Abstract

The impact of industrial waste and enterprises’ emissions on the chemical composition of water, in particular, the content of phosphate ions in it and the main physicochemical indicators of water (dissolved oxygen, hydrogen index and water temperature) are determined. A model for assessing the level of multipurpose water use and protection using tools of economic-mathematical modeling – fuzzy set theory implemented in MATLAB software is developed. Factors of this model include level of production improvement, adherence to technological discipline; level of average content of phosphate concentration and physicochemical parameters of the water; full disposal of household, agricultural and industrial waste; rationing of water supply and drainage, rationing of maximum permissible concentration of various substances in the waters for drinking, fishery and other purposes; zero waste water discharge, recirculating water supply; imposing penalties on pollution, littering and water depletion up to the closure of enterprises, factories workshops, complexes-pollutants in accordance with the legislation in force; phytomelioration; subsoil tillage, contour farming. Terms for the linguistic assessment of selected factors of the level of multipurpose water use and protection in hydroecosystems based on fuzzy logic theory and the ranges of their changes are proposed. The rules base for the developed model is formed. Input and output parameters defuzzification is carried out according to the “center of gravity” of the Mamdani module of the MATLAB software. The level of multipurpose water use and protection is recorded at 80%, which corresponds to the high level (from 70% to 100%) of the scale and can be improved by increasing the level of each factor of the model. It is established that, when supplementing the input parameters and the rule base, the developed model can be applied to specific industrial enterprises. Keywords—hydro-ecosystem, fuzzy set theory, model for assessing the level of multipurpose water use and protection