Methods for determining water flow from rice field to open drainage system

Dilbar Abduraimova,Makhsud Оtakhonov,Farrukh Babajanov,D Bazarov

doi:10.1051/e3sconf/202126403008

Dilbar Abduraimova, Makhsud Оtakhonov + Show 2 more

Open Access

https://doi.org/10.1051/e3sconf/202126403008

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Abstract

Accurate and correct hydraulic calculations are important in the projection of open drainage systems. Because of the hydraulic calculations, it is possible to determine the parameters while constructing it. For calculating the hydraulic, it is necessary to determine the amount of filtration water from the cultivated fields. Crops and irrigation norms differ in the irrigated areas. Of these, rice is the most demanded of water. This article describes how to use GIS to determine the drainage water flow discharge into the open drainage system in the area under cultivation. The research object was the Central Mirzachul open drainage system which was constructed on irrigated land in the south of the Syrdarya region, located in the Mirzachul area. Sentinel 2 satellite imagery was used to identify rice fields in the study area. Downloaded satellite images were analysed using the ArcMap application of ArcGIS, and several steps were taken to create and map a study area. Based on the results of the analysis, the surface and size of the rice fields are determined. Hydraulic calculations were provided based on the determined data. As a result of hydraulic calculations, it was determined that the collector drainage system with the length of 1200 m drops 4.1 m3/s water from the rice fields.

Highlights

Collector-drainage systems (CDS) play an important role in improving the reclamation condition of irrigated fields
Studies have been carried out to determine the discharge of filtration water from rice fields
The step was measured the surface area of rice fields situated on the right and left sides of the open CDS

Summary

Introduction

Collector-drainage systems (CDS) play an important role in improving the reclamation condition of irrigated fields. The main part of the irrigated fields of the Hungry Steppe is made up of sowing areas of the Syr Darya region. To provide water for the irrigated lands of the Syr Darya region in 1896, the Dustlik canal was built [1]. In 1926, 180 km of canals and canals were built, irrigated areas reached 53 thousand hectares [2]. As a result of the intensive development of the steppes in 1956, irrigated land areas reached 280 thousand hectares, and agricultural products were grown. The imperfect work of the CDS system led to an increase, salinization, and worsening of the land reclamation condition. To improve the reclamation condition of the sowing areas, intensive construction of CDS began.

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