Результаты натурных исследований магистрального канала в Республике Калмыкия

Abstract

The purpose of the research was to assess the current technical condition of the main canal of the Sarpinskywater supply-irrigation system, as well as to determine its hydraulic characteristics based on the data of fi eld surveys. As a topographical basis for studying the route of the BP-1 of the main canal of the water supply-irrigation system, an interactive map of the study of the territory of the Russian Federation of the Federal State Budgetary Institution «Rosgeolfond», as well as data from satellite maps, was used. Materials for studying the parameters of irrigation canals and hydraulic structures of the system under consideration were the technical reports of the Sarpinsky branch of the Federal State Budgetary Institution«Kalmmeliovodkhoz» Administration», as well as the passports of the main and inter-farm canals of the BP-1 and «Bypass» system. The technical condition of the canal and hydraulic structures was assessed according to GOST 31937-2011. The hydraulic operating conditions of the main canals in the site of the hydrometric post are characterized by an increased value of the roughness coefficient, which exceeds the standard value for canals with a water fl ow of no more than 25 cubic meters/s by 1.16 times. The increase in the roughness coefficient is a consequence of siltation of the canal bottom and overgrowth of the canal along the banks, taking into account the long-term period of its operation. With an increase in the flow of water supplied to the canal to normal and maximum values, it is possible to reduce the flow capacity of the canal and increase the normal depth of water in the canal.