Melikhova E.V. - Mathematical Design of P Moisture Transfer Processes at Drip and Subsurface Irrigation |
Written by Erkin Turdibaev | |
Friday, 17 February 2017 | |
The basic approaches of moisture transfer design at the different ways of irrigation are considered in the article. The well-known models of moisture transfer in a porously-capillary environment at the action of stationary and non-stationary mass forces taking into account nascent nonlinear effects that can be applied for subsoil irrigation are analyzed here. In this model the parameters are a water-table level, coefficient of water return; diameters of capillaries, relative volume of capillaries, speed of filtration, total inflow and outflow, water level in capillaries, capillary climbing ability in capillaries of the certain diameter, height of the capillary getting up, etc. Solution of S.N. Novoselskiy's mathematical model of moistures transfer in frequent derivatives for drip irrigation is offered. The carried out analysis of the considered mathematical models showed that each of the watering methods requires application of the different approaches to a mathematical design, representing separate parties of this difficult process of moisture transfer. For the considered watering methods we use different approaches to mathematical design, reflecting the physical features of moisture transfer process at drip irrigation. Aggregating of the described models can promote exactness of mathematical description of moisture transfer processes on the whole, that will allow specify the engineering methodology of watering and irrigation norms calculation with the purpose of natural resources economy including energy consumptions. Download (in Russian) (pdf, 3,64 Mb) Source: http://cyberleninka.ru/ |
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