Efficiency of use of resource-saving technology in reducing irrigation erosion
Аннотация
Protecting soils from irrigation erosion is an urgent problem for many countries with arid climate, including the territory of Uzbekistan. It is known that there are a number of factors have for irrigation erosion, one of the main factor is depends on the movement of the water flow in the field vegetation bed. This paper presents results of a study of the laws of flow movement in fields of different shapes to assess and prevent irrigation erosion. Studies have shown that obtaining trapezoidal ridges in cotton irrigation can optimize the flow regime. At the same time, special constructed water meters were used for irrigation. The value of the hydraulic parameters of the flow in the field and the amount of erosion were determined, with taking into account the mode of movement and energy condition of the flow in the fields with a whole diameter of 15 mm in the water meter. As a result, in the washed part of the soil, the leaching of soil particles per season is 40.58 t / ha when irrigating cotton with ordinary simple straight furrows, and in the case of trapezoidal furrows, soil leaching is 13.07 t / ha when irrigated with a water meter with a hole diameter of 15 mm. formed.