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Mathematical Modeling-Based Management of a Sand Trap throughout Operational and Maintenance Periods: Case Study Pengasih Irrigation Network, Indonesia
Authors
Sigit Supadmo Arif
Ho Huu Loc
+6 more
S. Mohanasundaram
Murtiningrum Murtiningrum
Sigit Nurhady
Edward Park
Ansita Gupitakingkin Pradipta
Sangam Shrestha
Publication date
1 January 2022
Publisher
'MDPI AG'
Abstract
Surface irrigation networks in Indonesia are damaged by several factors, and sedimentation is among the most severe challenges. Sand traps play a substantial role in improving irrigation system efficiency by reducing sedimentation. There are two periods in sand trap operation: the operational and maintenance periods. Pengasih is one of the irrigation schemes implemented in the Progo Opak Serang (POS) River Basin, which has a high level of erosion. This study aimed to propose an appropriate management strategy for the Pengasih sand trap as the first barrier in irrigation network sedimentation based on mathematical modeling. The HEC-RAS simulation software was used to simulate the sand trap hydraulic behaviour. The results show that the validated Manning’s coefficient was 0.025. The optimal transport parameters were Laursen for the potential function, Exner 5 for the sorting method, and Rubey for the fall velocity method. The recommended flushing timeframe is 315 min, with a discharge of 2 m3/s. We suggest that the sand trap flushing frequency be performed twice a year, and it can be performed at the end of March and October. This coincides with the end of the first and third planting seasons of the irrigation scheme. © 2022 by the authors
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Last time updated on 27/01/2024