The eco-hydraulics base as flood mitigation to overcome erosion and sedimentation problems : a case study in the Lae Kombih River, Indonesia

• Autorzy: Ziana Ziana , Azmeri Azmeri , Yulianur Alfiansyah , Meilianda Ella

Identyfikatory

DOI

10.24425/jwld.2022.142326

• Języki publikacji: EN

Abstrakty

EN

Erosion and sedimentation have a very big influence on flooding. Floods are strongly influenced by land use and population activities that change the river’s physical condition, including erosion and sedimentation. The river upstream was very steep, and the downstream was narrowing and meandering with high rainfall recorded. This study analyses erosion, sedimentation, and its handling using the eco-hydraulic base. The method involves input rainfall data, river hydraulics, land use, watershed area, and land cover. The analysis of hydrology, hydraulics, land use, flood discharge, and eco-hydraulic, inundation height, vegetation diameter, velocity reduced, and riverbank width measured in five bridges cross-sections along the river. The eco-hydraulic compares the width of existing riverbanks and design, high inundation, and the vegetation diameter to minimise flood discharge. Erosion in the right cliff is 22.73% and the left cliff is 37.04%, land erosion was 225.83 Mg∙ha^-1∙year ^-1. The river’s bottom is formed by rocks of 0.18-1.30 mm. The plantation land used around the Lae Kombih River grows mainly an oil palm with a diameter of 0.5-0.7 m. The riverbank design on 100 m for vegetation diameter of 0.1-1.0 m can retain flood discharge for five years return period up to 72.3%, resulting in discharge of 112.04209.43 m³∙s^-1. The largest erosion and sedimentation on the river border is Dusun Silak, so it is recommended to plant Vetiveria zizanioides, Ipomoea carnea and Bambusoideae. An inundation height of 0.9 m can be recommended to design an embankment to be used as flood mitigation.

Słowa kluczowe

EN

eco-hydraulics; erosion; riverbank; sedimentation; vegetation diameter

• Wydawca: Wydawnictwo ITP
• Czasopismo: Journal of Water and Land Development
• Rocznik: 2022
• Tom: no. 55
• Strony: 229--239
• Opis fizyczny: Bibliogr. 35 poz., fot., rys., tab., wykr.

Twórcy

autor

Ziana Ziana

• Universitas Syiah Kuala, Doctoral Program, School of Engineering, Banda Aceh, 23111, Indonesia
• Universitas Syiah Kuala, Department of Civil Engineering, Banda Aceh, 23111, Indonesia

• https://orcid.org/0000-0001-5048-9586

autor

Azmeri Azmeri

• Universitas Syiah Kuala, Doctoral Program, School of Engineering, Banda Aceh, 23111, Indonesia
• Universitas Syiah Kuala, Department of Civil Engineering, Banda Aceh, 23111, Indonesia

• https://orcid.org/0000-0002-3552-036X

autor

Yulianur Alfiansyah

• Universitas Syiah Kuala, Doctoral Program, School of Engineering, Banda Aceh, 23111, Indonesia
• Universitas Syiah Kuala, Department of Civil Engineering, Banda Aceh, 23111, Indonesia

• https://orcid.org/0000-0002-8679-1792

autor

Meilianda Ella

• Universitas Syiah Kuala, Doctoral Program, School of Engineering, Banda Aceh, 23111, Indonesia
• Universitas Syiah Kuala, Department of Civil Engineering, Banda Aceh, 23111, Indonesia

• https://orcid.org/0000-0002-3073-7690

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).