Pemodelan Hujan-Debit DAS Kali Madiun Menggunakan Model HEC-HMS

Fadhilla, Irma Noor; Lasminto, Umboro

doi:10.12962/j2579-891x.v19i3.9517

Cited by 6 publications

(10 citation statements)

References 4 publications

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“…The SCS unit hydrograph is of the transfer methods provided by the model. It simulates the process of the direct runoff based on precipitation excess at surface and transforms the excess into point runoff [11]. The parameter used in the routing model is lag time which highly influences the peak and the times of the peak outlet at the outlet [12].…”

Section: Resultsmentioning

confidence: 99%

Land use change analysis and the impact on the streamflow of the Keureuto River

Alief,

Khairullah,

Fadhliani

2024

IOP Conf. Ser.: Earth Environ. Sci.

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The increasing of population is proportional to the natural resource’s exploitation. Over the past few decades, the activity has converted the natural land into agricultural and plantation fields, urbanized areas, and other types of use. In some watershed systems, land use conversion has reduced the system’s capability both in sustaining water resources and in preventing extreme runoff. Such is the case of the 302 km2 Krueng Keureuto Watershed which supports the water supply for the North Aceh District, both for irrigation and municipal use. Therefore, this study aims to investigate the land use change in the system and its impact on the streamflow. The land use is classified based on the Landsat satellite images of the year 2015 and 2021, using the Supervised Classification tool in ArcGIS. The impact is investigated using a Hydrologic Modelling System (HEC-HMS). The outlet is defined based on the Automatic Water Level Recording (AWLR) station downstream of the Keureuto River. A significant reduction of the forest is estimated at 27.67% in seven years. In contrast, the land use types such as urbanized areas, agricultural fields, and shrubs are increasing to 6.34%; 4.75%; and 5.75%, respectively. Based on the model simulation it is confirmed that the changes in land use have altered the river flow regime.

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Section: Resultsmentioning

confidence: 99%

Land use change analysis and the impact on the streamflow of the Keureuto River

Alief,

Khairullah,

Fadhliani

2024

IOP Conf. Ser.: Earth Environ. Sci.

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“…The Gumbell distribution has the highest planned rainfall value, while the Iway Kadya distribution has the lowest planned rainfall value, and the Log Pearson distribution has a planned rainfall value slightly above the Iway Kadya distribution. These three distributions can be used to determine planned rainfall, but the most suitable method to use is the gumbell method; and [7] shows that In making a numerical model, calibration is required and could use the Manning roughness coefficient as a parameter. The manning roughness coefficient can affect the condition of flows, one of which is the water level elevation.…”

Section: Control Of River Cross Section Of Bridge Elevationmentioning

confidence: 99%

Hydrological Analysis of the Makassar-Pare Corridor Rail Elevated Bridge in Pangkep Regency South Sulawesi Province

Azis

2024

ITM Web Conf.

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Hydrological analysis is an important stage in the development of water resources. Determining hydrological quantities is actually not too difficult if the data for analysis purposes is available in sufficient quantity and quality. The method used for the analysis of the planned flood discharge depends on the amount of discharge data and rainfall data. Based on the analysis of discharge data and rain data. For planning the storage capacity of the river crossing the railway bridge, using the Nakayasu Synthetic Unit Hydrograph (HSS) Method, the river water level to the JEKA 2 structure is 13.38 m and the river water level to the tracks is 16.38 m so that the railroad tracks at Bridge 2 can be said to be safe against the river water level. Hydrological analysis is one part of a whole series in the planning of transportation structures such as roads, bridges and railway bridges including flood barrier embankments and so on.

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“…The values of the parameters in the basin model need to be entered to get the flow model discharge. Some of the parameters contained in the watershed characteristics are the base flow, the CN (Curve Number) value extracted from the soil type classified according to the SCS model as shown in table (1) [8]and as in table (2) for the classification of values [9]. Initial infiltration (Initial Abstraction), the peak time of the hydrograph (Lag Time) or the time required for rainwater that falls at the farthest point from a flow area to reach the review point.…”

Section: 34mentioning

confidence: 99%

“…For impervious values, it is the same as finding the CN value. The impervious value is taken in stages and then calculated based on a formula such as equation (2) [8].…”

Section: 34mentioning

confidence: 99%

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LiDAR DTM Application for Flood Inundation Modeling and Visualization (Case Study: Batu City, East Java)

Kholiq

Hidayat

2023

IOP Conf. Ser.: Earth Environ. Sci.

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LiDAR DTM has been widely used for simulating flood inundation from river overflows. This flood inundation simulation needs to be done as an alternative step in the flood control system and flood disaster mitigation to determine the estimated area affected by the flood. Flood simulation is a form of unsteady flow that is simulated with the HEC-RAS program that allows the user to perform one-dimensional steady flow, one and two-dimensional unsteady flow calculations, sediment transport/mobile bed computations, and water temperature/water quality modeling, and visualizes flooded areas and flood-affected areas using a geographic information system approach. Hydrological data is obtained from daily rainfall processing at the time of station rain. Hydrograph analysis was performed using the SCS CN model on the HEC-HMS software to estimate the flow rate and peak discharge. Watershed area, curve number, Impervious value, Initial Abstraction, and time lag are parameters that affect hydrograph analysis. From the results of the hydrograph analysis, the peak discharge of the model is 119.992 m2/s. Meanwhile, hydraulic analysis using HEC-RAS resulted in an inundation of 364 m2 which inundated three villages, namely Bulukerto, Bumiaji and Sidomulyo villages. The depth of the inundated area ranged from 0-15 m with an average depth of 4.534 m. The Sidomulyo area affected by the flood inundation scenario is 4,924 meters with an area of 0,02 ha. Bumiaji village was flooded with an area of 0,007 ha with a scenario of inundation depth of 4,049 m. Bulukerto village which was affected by the flood has an area of 20,972,832 m2 with a scenario of inundation depth reaching 4,343 m. Then some land cover such as residential land that is inundated by this flood simulation is 0,002 ha. Buildings from residential areas that were flooded reached 209 buildings. Then the area of agricultural land affected is 0,02 ha. In addition, there are also green open spaces affected by this simulation with an inundation area of 0,003 ha.

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Pemodelan Hujan-Debit DAS Kali Madiun Menggunakan Model HEC-HMS

Cited by 6 publications

References 4 publications

Land use change analysis and the impact on the streamflow of the Keureuto River

Land use change analysis and the impact on the streamflow of the Keureuto River

Hydrological Analysis of the Makassar-Pare Corridor Rail Elevated Bridge in Pangkep Regency South Sulawesi Province

LiDAR DTM Application for Flood Inundation Modeling and Visualization (Case Study: Batu City, East Java)

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