Flood Inundation and Dam Break Analysis for Disaster Risk Mitigation (A Case Study of Way Apu Dam )

Ansori, Mohamad Bagus

doi:10.21660/2021.84.j2130

Cited by 5 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Rivers which are always synonymous with slum areas or slum areas make it very easy to find small animals such as mosquitoes, flies, rats, insects plus a river landscape whose borders are swampy soils that are very easy to find puddles up to flood plains [29], [30]. The soil in the river when entering the rainy season with conditions of increased water discharge plus the condition of the buildings around it will turn out to be watertight so that the settlements are flooded by water [31], [32]. This inundation condition will gradually form a new ecosystem [33].…”

Section: Resultsmentioning

confidence: 99%

Euclidean Distance Modeling of Musi River in Controlling the Dengue Epidemic Transmission in Palembang City

Giofandi

Sumarmi²,

Bachri³

et al. 2022

Open Access Maced J Med Sci

View full text Add to dashboard Cite

BACKGROUND: Various attempts have been made to control the population of Aedes aegypti with the help of chemicals or by engineering Wolbachia pipentis, an obligate intracellular bacterium that is passed down through DENV and arbovirus infections to manipulate the monthly average reproductive yield. This study reviews the phenomenon of the river border area which is one of the habitats for the Aedes aegypti mosquito in the Musi River, Palembang City. AIM: The application of the euclidean distance method in this study was carried out to determine the environmental exposure of settlements along the river basin area. METHODS: The research methodology was carried out objectively related to data on dengue incidence in 2019. It was carried out by taking location coordinates through the application of geographic information systems and the use of satellite imagery for data acquisition of existing buildings. This stage is followed by bivariate statistical calculations using the application of WoE where the probability value of the measurement is described using the Area Under Curve. Processing and accumulation carried out with existing buildings will result in a calculation of the estimated size of the exposure area. RESULTS: The results obtained provide information, where the natural breaks jeanks value of 0.007-0.016 range results in 1465ha of heavily exposed building area. The value of the temporary bivariate statistical calculation will produce an AUC probability number of 0.44 which describes the relationship between the Musi river and the findings of dengue symptoms in the sub-districts around the Musi river border area, Palembang City. Swamp soil conditions are vulnerable to being a habitat where Aedes aegypti larvae are found. CONCLUSIONS: Based on the analysis that we obtained from the population of dengue incidence and the condition of the river basin area showed a significant structure with the distribution of dengue incidence, it is known that the presence of buildings on the river Musi banks has a greater risk of infectious diseases transmissions and natural disasters ranging from sanitation, hygiene, flooding to river erosion.

show abstract

Section: Resultsmentioning

confidence: 99%

Euclidean Distance Modeling of Musi River in Controlling the Dengue Epidemic Transmission in Palembang City

Giofandi

Sumarmi²,

Bachri³

et al. 2022

Open Access Maced J Med Sci

View full text Add to dashboard Cite

show abstract

“…The 2D flow module can be used to model flow, sediment transport, and water quality in river systems. HEC-RAS 2D v6.3 could conduct a one-dimensional steady flow model and twodimensional unsteady flow models could improves the performance of several hydraulic structures and lateral buildings, such as weirs, gates, pump stations, bridge scouring, as well as dam break model simulation [30,31].…”

Section: Hec-ras 2d Unsteady Flow Hydrodinamics Uniform Precipitation...mentioning

confidence: 99%

Flood Hydrograph Analysis Using Synthetic Unit Hydrograph, Hec-Hms, and Hec-Ras 2d Unsteady Flow Precipitation on-Grid Model for Disaster Risk Mitigation

Ansori¹

2023

GEOMATE

View full text Add to dashboard Cite

This study presents a flood hydrograph numerical modeling of the Keser watershed for disaster risk mitigation and water resources management for an emergency action plan (EAP) on the Tugu dam. Several formulations for calculating peak discharge, which are associated with information on flood design in Indonesia are regulated in SNI 2415:2016 regarding the procedure of flood discharge calculation and design. This information is important and related to water structure dimensions, risk, costs, and reliability. The complexity of watershed conditions affects the hydrograph shape and volume. Hence, a performance analysis is needed to identify the best current hydrograph model. In this study, the performance of Nakayasu, Gamma 1, and Snyder SUH was analyzed and compared with the numerical modeling using the HEC-RAS 2D hydrodynamics precipitation on grid and HEC-HMS numerical model in the Keser watershed with one-hour rainfall height of 114.92 mm (R50). Based on the calculation results, the hydrologic numerical model flood discharge calculation using HEC-HMS method was 451.1 m 3 /s. The peak discharge values obtained using the Nakayasu, Gamma, and Snyder methods were 424.2, 410.4, and 439.4 m 3 /s, respectively. The results of the numerical model with HEC-RAS 2D v6.3 with uniform precipitation on the grid obtained a peak discharge hydrograph value of 420.98 m 3 /s. Therefore, the highest peak discharge results were obtained from the HEC-HMS method among the three SUH formulas and HEC-RAS calculations. Hence, the deviation of peak discharge value using three SUH, HEC-HMS, and HEC-RAS was obtained under 10%.

show abstract

“…The Hydrologic Engineering Center's River Analysis System (HEC-RAS) [10] is a widely used software for river flow modeling, including floodplain analysis, sediment transport, dam break [11], and water quality analysis. HEC-RAS has been widely used for one-dimensional (1D) modeling of river hydraulics.…”

Section: Introductionmentioning

confidence: 99%

Reliability of Runoff Hydrograph Model for Extreme Rainfall Events using HEC-RAS 2D Flow Hydrodynamics Rain-On-Grid

Ansori,

Lasminto,

Gde Kartika

2023

IOP Conf. Ser.: Earth Environ. Sci.

Self Cite

View full text Add to dashboard Cite

Hydrological modeling is a valuable tool for analyzing water resources and predicting the impacts of extreme rainfall events, particularly for flood risk mitigation. Accurate results from hydrological models rely heavily on detailed input of watershed characteristics, including morphometric factors, land cover, and slope. In the face of the increasing frequency and severity of floods due to climate change, hydrological modeling has become an essential tool for disaster risk mitigation and management. HEC-RAS is a widely used software for river flow modeling and floodplain analysis. HEC-RAS 2D with the rain-on-grid meteorological model is a powerful tool for simulating flood events in complex river systems. The rain-on-grid method enables the simulation of spatially distributed rainfall events and their impact on runoff, which is crucial for modeling extreme runoff hydrographs. Previous studies have demonstrated the accuracy and effectiveness of HEC-RAS 2D with rain-on-grid in modeling extreme runoff hydrographs. This study aims to validate the reliability of HEC-RAS 2D hydrodynamics in simulating unsteady flow with meteorological data will be examined within a laboratory-scale physical model of the watershed. Additionally, the performance of HEC-RAS 2D will be evaluated in a observed watershed, specifically the Bangga watershed in Central Sulawesi to assess the performance of the HEC-RAS 2D Hydrodynamics model. The runoff hydrograph reliability model using HEC-RAS 2D rain-on-grid yielded close results when compared to a laboratory-scale physical model with a rainfall simulator and HEC-RAS 2D simulation using meteorological input data. The error in Time of Peak (Tp) and Peak Discharge (Qp) between the physical and numerical models was 7% and 3.5%, respectively. Additionally, in the HEC-RAS 2D simulation, a Manning roughness coefficient value of 0.04 closely matched the results of the physical model, while there was some variability when comparing HEC-RAS 2D results with measured data in Bangga watershed of Central Sulawesi. However, the numerical model exhibited relatively approaching result with the HEC-HMS SCS hydrograph model.

show abstract

Flood Inundation and Dam Break Analysis for Disaster Risk Mitigation (A Case Study of Way Apu Dam )

Cited by 5 publications

References 7 publications

Euclidean Distance Modeling of Musi River in Controlling the Dengue Epidemic Transmission in Palembang City

Euclidean Distance Modeling of Musi River in Controlling the Dengue Epidemic Transmission in Palembang City

Flood Hydrograph Analysis Using Synthetic Unit Hydrograph, Hec-Hms, and Hec-Ras 2d Unsteady Flow Precipitation on-Grid Model for Disaster Risk Mitigation

Reliability of Runoff Hydrograph Model for Extreme Rainfall Events using HEC-RAS 2D Flow Hydrodynamics Rain-On-Grid

Contact Info

Product

Resources

About