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PEMODELAN DINAMIS SEDIMENTASI KOLAM RETENSI PENGENDALI BANJIR PERKOTAAN

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Population growth, urbanization, and climate change increase the risk of flooding in urban areas due to reduced infiltration areas and increased impermeable surfaces. Retention ponds are an important solution for retaining runoff, reducing peak discharge, and improving water quality through sediment deposition. This study analyzes the characteristics, sedimentation dynamics, and operation and maintenance (O&M) models of retention ponds in Palembang to support urban flood control. This research was conducted at the Siti Khadijah and Kambang Iwak Besak Retention Ponds in Palembang City from November 2023 to November 2024 to assess the effectiveness of retention ponds in flood control and sediment management. Research activities included analysis of pond characteristics, sediment distribution and movement, and development of an Operation and Maintenance (OP) model based on hydrological data. Data collection was carried out using GPS, flow meters, depth sounders, and ArcGIS software. Analysis was conducted quantitatively and spatially to assess pond capacity, sediment capture efficiency, and the effectiveness of operational scenarios in reducing peak discharge. The research results are expected to provide a scientific basis for more efficient, adaptive, and sustainable management of retention ponds to support urban flood control systems in Palembang. This study shows that the Siti Khadijah Retention Pond, with a catchment area of approximately 95.21 hectares, is dominated by dense settlements and minimal vegetation, while the Kambang Iwak Retention Pond, with an area of 29.1 hectares, has more extensive urban park vegetation and a better drainage system. This condition causes Siti Khadijah to have a higher sediment load and TSS concentration than Kambang Iwak. Sediment volume in Siti Khadijah increased rapidly in the first two years and approached capacity, while in Kambang Iwak the increase was very small. The results of the Operation and Maintenance (OP) model simulation showed that without intervention, the performance of the Siti Khadijah pond decreased by an average of 28.39% in 10 years, while Kambang Iwak remained stable at above 98%. Efforts that have proven effective in maintaining capacity include reducing solid waste, increasing land cover vegetation by up to 30%, and routine dredging of 9,760 m³ of sediment per year in Siti Khadijah. Therefore, the recommended retention pond management strategy includes increasing vegetation, controlling household waste, and regular maintenance to maintain the pond's function as a sustainable urban flood control.

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Detail Information

Series Title

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Call Number

T1894582025

Publisher

Palembang : Prodi Doktor Ilmu Lingkungan Sekolah Pascasarjana Universitas Sriwijaya., 2025

Collation

xvi, 272 hlm.; ilus.; tab.; 29 cm

Language

Indonesia

ISBN/ISSN

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Classification

627.407

Content Type

Text

Media Type

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Carrier Type

-

Edition

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Subject(s)

Prodi Doktor Ilmu Lingkungan
Pengendalian Banjir.

Specific Detail Info

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Statement of Responsibility

MI

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