WATER- POWER RESOURCES OF A MOUNTAIN RIVER:

Abstract

Rational choice of the location of the water-electro power stations is associated with the availability of information on the distribution of gross power along the river bed. In mountainous conditions, while determining this value, it is advisable to rely on the general principles of the division of the profile of the river bed into the sections of constant slope. This work is the study of the formation of the hydropower potential of the stream in the area of the mountain river. Its purpose is to establish a connection between the hydropower potential and the hydrological as well as morphometric parameters of the river bed. The article solves the task of finding a model for describing the process of gross power increase during the downstream water flow at the section with the inflow available. The analytical relations between the gross potential power value and the generally accepted parameters of the water flow (flow volume and bed profile) are established. With an inflow available, the distance between the location of the inflow mouth and the beginning of the section as well as inflow width are also taken into consideration. A linear approximation is used to describe the slope of a section. The functional dependence of power on the flow volume, on the difference in the heights of the bed within the section, on inflow volume and on the height mark of its mouth, on the position of the inflow mouth relative to the beginning of the section is substantiated. The article establishes the correlations that give the possibility to determine of the power distribution along the section. The authors suggest the model and the method of calculating the gross potential power of the water flow on the section of the river bed for a case when the inflow is available. The basis of the methodology is the description of the flow volume growth in the bed downstream the river. This description is combined with linear and reverse trigonometric functions. The distribution of gross potential capacity at the section of the Bukovyna Carpathians – the Siret River is calculated. The correlation of both exact analytical and approximate solutions is used. The paper shows the practical identity in the values of the power of the flow, obtained on their basis. The authors made a conclusion about the adequacy of the received distribution of the physical model of downstream power increase, both above and below the inflow entry point. The practical value of the approach to determining the potential gross flow capacity of water lies in its heuristic component.