Hydraulic calculation of horizontal open drainages

Aybek Arifjanov,Luqmon Samiev,Shamshodbek Akmalov,Maqsud Otaxonov,A Volkov,A Pustovgar,T Sultanov,A Adamtsevich

doi:10.1051/e3sconf/20199705039

Aybek Arifjanov, Luqmon Samiev + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/20199705039

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Abstract

In article analysed the factors influencing the hydraulic processes which arise in the open horizontal drainage systems. Open drainages plays important role in order to improve the ameliorative condition of the agricultural area, salt washing on the soil. It is emphasized that the deep drainage in our region has a good effect on the soil condition and salt removing. At present, efforts are being made to improve the productivity of the collectors to clean and built. As example the collector drainage systems in Syrdarya region are listed. It is observed that the motion mode of open drainage flows is physically identical. Due to the complexity of equations in the unstable motion mode, the drainage water flow scheme in the collectors reflects the hydraulic calculation of the movement. Researches were provided in open agricultural drainage system of Syrdarya region and analysis have been done in natural field conditions. It has been noted when slope of the drainage bed is equal to i<0,0005 intensity of deformation were very high, when slope was between 0,0005<i<0,0011 intensity of deformation of collector bed was equal to the minimum level. In this article provided hydraulic calculation for Syrdarya region drainage system for choosing dynamical stable shape of bed. Those hydraulic calculations and projections ensure collectors with long time period of exploitation condition. Calculation and analyses were done with taking account trapezoidal capacity of the stream in drainage system, and the results of studies on increasing the flow efficiency are reflected. Analysed that when slope will increase until 20% discharge capacity will increase because of high average flow velocity increased by 7-8 times and discussed difference of them. As a result of the hydraulic calculation, the slope of the drainage increased from i-0,00048 to i-0,0006, the fact that the flow capacity increased by 25% due to the increase because of flow velocity.

Highlights

From the very ancient times, farmers have been working on against to water salinization, fertility degradation, and cleaning of soils from harmful salts with water
Investigations were conducted in the drainage systems of Khovos and Sayhunobod districts of Syrdarya region with the aim of study the dynamic change processes in the open drainage system
Due to the natural field conditions, such kind of drainages with same slope, because of the low speed of water they fills with sediment in short times, as the results shape of cross-section changed, deteriorated

Summary

Introduction

From the very ancient times, farmers have been working on against to water salinization, fertility degradation, and cleaning of soils from harmful salts with water. It is necessary to bring out from agricultural field salt washing water and saline water produced after irrigation, with this aim were built artificial drainage systems [4,5,6]. As it is known, the main task in the process of salt removing is to dissolution salts in the soil with water and to remove them from the agricultural area. The main task in the process of salt removing is to dissolution salts in the soil with water and to remove them from the agricultural area For this purpose, it is necessary to ensure effective exploitation of drainage system. In Syrdarya region during a year provides cleaning and repairing of collector drainage systems with the length from 950 to 1100 km [9]

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