Conceptual framework and key areas of flood risk management plan in a single system of integrated river basin management

This article analyzes the rationale and problems of temperature influence on the work of hydraulic systems of aircraft. We consider about the hydraulic system, her design and operation principle. In the article is viding the definition of the rheological properties and the coefficient of hydraulic resistance for the hydraulic elements when the temperature conditions of operation of aircraft and machine oils changes. There is represent a method for testing the system on the performance of units depending on the choice of working fluids for different operating conditions. This allows achieve the stability and efficiency, which is very important for all transport models, especially if it relates to aviation.

Considered requirements to drive the positioning receiver sun power relative to the sun. Proposed use of the effect of thermal expansion of the liquid under the effect of increasing its temperature, and creation on this basis the thermal hydraulic positioning receiver which operates on the heat flux of sunlight. Formulated requirements for coefficient of thermal expansion and modulus of elasticity of fluids. Identified basic geometrical parameters of the drive elements, as well as their characteristics, which provide the thermal hydraulic performance.

On the basis of the fundamental law of conservation of energy is derived and practical formula for determining the maximum depth of local erosion crater. It is believed that all the specific (per unit volume) energy of the flow is spent on the work of raising the funnel of a unit volume of soil. Full-scale approximating the relative depth of local erosion of the inventory M. Zhuravleva, obtained the calculated dependence with regard to its reliability. Maximum depth of local erosion crater is a reference value, as estimated depth under no circumstances be greater than it.

The problem of protection from destruction by sea waves of the island of Tuzla, which is artificially separated from the head of the Caucasian Tuzla Spit.

The paper presents a mathematical model of work processes in hydraulic shock absorber, which takes into account the direction of motion, the inertial component of the load, the difference in throttling under the “compression” and “lights” out. Checking the correctness and adequacy of the model shoved the possibility of its use to study the influence of parameters and conditions of the operational characteristics of the shock absorber.

Coming from the mathematical model of river-bed deformations, which is based on equation of alluviums balance, it is got the differential equation for a flowrate in a subbridge river-bed taking into account the wash-out of this. It showed that it behaves to the class of homogeneous equations of I (first) order and it can be lead to equation of transfer. The decision of the Cauchy appropriate task is got.

The paper presents an improved method of hydraulic calculation of the peak discharge and time of concentration of the stormwater runoff from rectangular watersheds with collecting channel with rectangular cross-section, situated along the bottom side of the catchment. The method takes into account the relationship between time of concentration and design rainfall intensity. A computer program calculating the time of concentration and the peak storm water discharge, depending on the values of input parameters, is presented.