scholarly journals DAS Ampal Analisa Fungsi dan Pengaruh Bangunan Pengendali Banjir DAS Ampal Kota Balikpapan

2018 ◽  
Vol 2 (3) ◽  
pp. 39
Author(s):  
Rossana Margaret Kadar Yanti ◽  
Edijatno Edijatno ◽  
Umboro Lasminto
Keyword(s):  
Catchment Area ◽  
Flood Control ◽  
Peak Discharge ◽  
Flood Peak ◽  
Flood Discharge ◽  
Main River ◽  
The Difference

Ampal Catchment Area has 25.273 km2 area and 4.699 km main river length, which planned to have 13 flood control construction. Until 2017, this catchment area has only three flood control construction. The watershed has only three built-in batters that are used to reduce the amount of flood discharge flowing on the Ampal river. Based on these conditions, it is necessary to analyze the magnitude of the difference of flood peak discharge on the existing condition (three bendali) compared with the condition of the plan (thirteen bendali). Therefore, analyzed the function and influence of flood control construction in Ampal Catchment Area by counting the flood peak discharge in each condition. From the analysis result, obtained the amount of peak discharge flowing in Ampal river existing condition is equal to 170,40 m3/s while at the condition of plan is equal to 83,80 m3/s. From the results of analysis, it is stated that the magnitude of the decrease of debit (ΔQ) after all the builds is 86.60 m3/s.

scholarly journals Benefits of Embungs in the Rawa Pening Catchment Area for Reducing Tuntang River Flood Discharge

2018 ◽  
Vol 73 ◽  
pp. 08029
Author(s):  
Darsono Suseno ◽  
S Suripin ◽  
Budieny Hary ◽  
Cholifatul Afifah Risdiana ◽  
Pujiastuti Ratih ◽  
...  
Keyword(s):  
Catchment Area ◽  
Flood Control ◽  
Water Source ◽  
Raw Water ◽  
Sediment Control ◽  
Resources Management ◽  
Control Sediment ◽  
Central Java ◽  
Flood Discharge ◽  
River Flood

Rawa Pening is a natural lake as a source of water for Tuntang River which is used for hydropower, raw water source, main irrigation water source in Glapan weir located in Grobogan District, Central Java provinces. Rawa Pening will be developed as location of national and international ecotourism. An Optimal Water Resources Management is required with several studies. This study is the beginning of a series of studies planned to determine the potential of embungs and its utilization as flood control, sediment control of Rawa Pening and for reducing weeds growth.

scholarly journals Flood Reduction Analysis by Using Multiple Dams Sscenario in Karang Mumus River, Samarinda

2021 ◽  
Author(s):  
Riyan Benny Sukmara ◽  
Nadjadji Anwar ◽  
Ray Shyan Wu ◽  
Ariyaningsih
Keyword(s):  
Water Level ◽  
Flood Control ◽  
Peak Discharge ◽  
Wet Season ◽  
Control Effort ◽  
River Bank ◽  
Public Facilities ◽  
Flood Discharge ◽  
The Relationship ◽  
River Banks

Flooding issues in Samarinda have high depending on the capacity of Karang Mumus river. Considering the ability of Karang Mumus river to drain off flood discharge, there wore evidence that the constriction of River will drive to flooding issues, especially in rainy/wet season (October-April). The constriction of river happens because many people build nonpermanent houses and building on the river and river banks. Flooding potentially damages to the houses, roads, and other public facilities increasingly. To cope the issue, Government of Samarinda has tried many solutions to overcome the issue by building The Benanga dam and it has been planned to build multiple Dams in Karang Mumus sub-Watershed. This paper aims to analyze the effectiveness of flood control effort using multiple dams scenario in Karang Mumus Sub-Watershed. Analyzing process including hydrology simulation, the relationship between hydrographs and rise of water level simulation in Karang Mumus River. The result of this paper shows water level when peak discharge flows out existing river bank. Analyzing result also shows that flood control scenario is effective to reducing flood discharge until fifty percent compared without existing conditions.

scholarly journals ANALISIS BANJIR DAN TINGGI MUKA AIR PADA RUAS SUNGAI CILIWUNG STA 7+646 s/d STA 15+049

2018 ◽  
Vol 7 (1) ◽  
pp. 43-49
Author(s):  
Redaksi Tim Jurnal
Keyword(s):  
Frequency Analysis ◽  
Return Period ◽  
Synthetic Data ◽  
Gumbel Distribution ◽  
Peak Discharge ◽  
Design Flood ◽  
Distribution Method ◽  
Flood Peak ◽  
Method Of Calculation ◽  
Flood Discharge

The problem of flooding in DKI Jakarta is considered normal because almost every year can hit the city of Jakarta especially during the rainy season. In DKI Jakarta itself there are several rivers, one of which is Ciliwung River which is the most influential river in DKI Jakarta which often cause flood every year. The purpose of this research is to know the location of flood / river flood that occurs in the segments along Ciliwung River STA 7 + 646 s / d STA 15 + 049. Data processing begins with the calculation of average rainfall, frequency analysis, and then hour-time rain distribution. Method of calculation of flood discharge using the synthetic unit of Nakayasu and Gama I synthetic data. Rainfall data using 2 observation stations for 3 years rain (2014-2016). In the frequency analysis used Gumbel distribution berdasrkan test results suitability data Smirnov- Kolmogorov and Chi-Square. The result of flood peak discharge design with HSS Nakayasu on return period Q5 = 687,80 m3 / dt, Q10 = 743,21 m3 / dt, Q20 = 796,36 m3 / s, Q50 = 865,15 m3 / dt, Q100 = 916,71 m3 / s, while flood peak discharge design with HSS Gama I on return period Q5 = 347,03 m3 / s, Q10 = 372,12 m3 / s, Q20 = 396,20 m3 / s, Q50 = 427, 36 m3 / s, Q100 = 450,71 m3 / s. The design flood discharge value approaching the measured debit value is HSS Nakayasu. Steps continued using HEC-RAS 4.1.0 software to determine the capacity of river catchment by using Nakayasu discharge. After analyzing using the software, most stationing of the Ciliwung River at STA 7 + 646 to STA 15 + 049 can not accommodate the planned discharge during the 20th anniversary period, hence the need for river improvements in the form of river normalization and elevation of dikes.

scholarly journals The effectiveness of polder systems on peak discharge capping of floods along the middle reaches of the Elbe River in Germany

2007 ◽  
Vol 4 (1) ◽  
pp. 211-241 ◽  
Author(s):  
S. Huang ◽  
J. Rauberg ◽  
H. Apel ◽  
K.-E. Lindenschmidt
Keyword(s):  
Spatial Differentiation ◽  
River System ◽  
Peak Discharge ◽  
Computational Time ◽  
Elbe River ◽  
Flood Peak ◽  
Monte Carlo Techniques ◽  
Main River ◽  
The Elbe River ◽  
Computational Resources

Abstract. In flood modelling, many one-dimensional (1-D) hydrodynamic models are too restricted in capturing the spatial differentiation of processes within a polder or system of polders and two-dimensional (2-D) models are very demanding in data requirements and computational resources. The latter is an important consideration when uncertainty analyses using the Monte Carlo techniques are to complement the modelling exercises. This paper describes the development of a quasi-2-D modeling approach, which still calculates the dynamic wave in 1-D but the discretisation of the computational units is in 2-D, allowing a better spatial representation of the flow in polders and avoiding large additional expenditure on data pre-processing and computational time. The model DYNHYD (1-D hydrodynamics) from the WASP5 modeling package was used as a basis for the simulations and extended to incorporate the quasi-2-D approach. A local sensitive analysis shows the sensitivity of parameters and boundary conditions on the filling volume of polders and capping of the peak discharge in the main river system. Two flood events on the Elbe River, Germany were used to calibrate and test the model. The results show a good capping effect on the flood peak by the proposed systems. The effect of capping reduces as the flood wave propagates downstream from the polders (up to 0.5 cm of capping is lost for each additional kilometer from the polders).

scholarly journals PERBANDINGAN BEBERAPA METODE DEBIT PUNCAK BANJIR RANCANGAN COMPARISON OF SOME PEAK DISCHARGE FLOOD DESIGN METHODS

GANEC SWARA ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 526
Author(s):  
HUMAIROH SAIDAH ◽  
ATAS PRACOYO ◽  
KHAIRUDIN KHAIRUDIN
Keyword(s):  
Design Method ◽  
Water Discharge ◽  
Peak Discharge ◽  
Design Flood ◽  
Flood Peak ◽  
Accuracy Test ◽  
Flood Discharge ◽  
Proper Design ◽  
Design Calculations ◽  
Selection Of

Peak discharge flood analysis is very crucial in waterworks design. The proper design flood discharge will produce effective construction dimensions as project requirement. Therefore, flood design calculations must be analyzed using appropriate methods. The problem in estimating design flood discharge is usually found in ungauged watersheds which do not have any water discharge measuring equipment.This study wants to test the flood design method using rain data input to be applied to the Babak River, so the result can be used as a guide in the selection of flood discharge calculation techniques in other ungauged watersheds.The accuracy test is carried out by comparing the results of these methods with the flood design resulted from a frequency analysis of the Annual Maximum Series. Based on the results of the calculation, the peak flood of the Harpers method has the smallest RE and RMSEP values are 8.960% and 88.546 respectively. Thus, it can be concluded that the calculation of the design of the flood peak Haspers method has the best accuracy of the analysis results when compared with the Melchior and Weduwen methods for Babak River.

scholarly journals The effectiveness of polder systems on peak discharge capping of floods along the middle reaches of the Elbe River in Germany

2007 ◽  
Vol 11 (4) ◽  
pp. 1391-1401 ◽  
Author(s):  
S. Huang ◽  
J. Rauberg ◽  
H. Apel ◽  
M. Disse ◽  
K.-E. Lindenschmidt
Keyword(s):  
Spatial Differentiation ◽  
River System ◽  
Peak Discharge ◽  
Computational Time ◽  
Elbe River ◽  
Flood Peak ◽  
Monte Carlo Techniques ◽  
Main River ◽  
The Elbe River ◽  
Computational Resources

Abstract. In flood modelling, many one-dimensional (1-D) hydrodynamic models are too restricted in capturing the spatial differentiation of processes within a polder or system of polders and two-dimensional (2-D) models are very demanding in data requirements and computational resources. The latter is an important consideration when uncertainty analyses using the Monte Carlo techniques are to complement the modelling exercises. This paper describes the development of a quasi-2-D modeling approach, which still calculates the dynamic wave in 1-D but the discretisation of the computational units are in 2-D, allowing a better spatial representation of the flow in polders and avoiding large additional expenditure on data pre-processing and computational time. The model DYNHYD (1-D hydrodynamics) from the WASP5 modeling package was used as a basis for the simulations and extended to incorporate the quasi-2-D approach. A local sensitivity analysis shows the sensitivity of parameters and boundary conditions on the filling volume of polders and capping of the peak discharge in the main river system. Two flood events on the Elbe River, Germany were used to calibrate and test the model. The results show a good capping effect on the flood peak by the proposed systems. The effect of capping reduces as the flood wave propagates down stream from the polders (up to 0.5 cm of capping is decreased for each additional kilometer from the polder).

scholarly journals Geoengineering conditions of the environmental protection facilities in the centre of the Oder River

2018 ◽  
Vol 45 ◽  
pp. 00023
Author(s):  
Magda Hudak ◽  
Urszula Kołodziejczyk ◽  
Jakub Kostecki
Keyword(s):  
Catchment Area ◽  
Flood Control ◽  
Negative Impact ◽  
Flood Damage ◽  
Control Measures ◽  
River Bed ◽  
Main River ◽  
Oder River ◽  
River Valleys ◽  
Sedimentation Processes

The ongoing management of river valleys has had a negative impact on the effectiveness of flood protection of former floodplains. The risk of flooding and flood damage is constantly increasing. As a result of disorganized industrialization, we are dealing with the accumulation of precipitation which flows much faster from the catchment area to the main river. In turn, due to erosion and the sedimentation processes, the capacity of the main river bed and its tributaries is limited. The solution to the problem may be multidirectional flood control measures, which were designed for the Lubuskie part of the Oder River, from Nowa Sól to Milsko. They concern: the construction of a flood wall in Nowa Sól, the modernization of the flood embankments in the Nowa Sol area and reconstruction of the former floodplain in Milsko. The paper presents the geoengineering conditions of these projects.

scholarly journals Estimated Flood Discharge in Downstream Krueng Meureubo of Pasi Pinang Section West Aceh Regency

2021 ◽  
Vol 1 (1) ◽  
pp. 41-45
Author(s):  
Muhammad Ikhsan ◽  
Rinaldy Rinaldy
Keyword(s):  
Rainy Season ◽  
Catchment Area ◽  
Local Community ◽  
Rapid Development ◽  
High Rainfall ◽  
Flood Discharge ◽  
Main River ◽  
Almost All ◽  
The Village ◽  
Peak Flood

The phenomenon of floods in Indonesia has become a routine thing that happens every year, almost all areas that are lowlands often flood when the rainy season arrives. Flooding is caused by high rainfall where the ability of the soil to absorb water decreases along with the rapid development of land that was once a rainwater catchment area, consequently surface runoff becomes high. Pasi Pinang Village can be categorized as a very flood prone village in Meureubo Subdistrict, due to the low condition of this village and directly borders the Meureubo river. Many adverse effects caused by floods and cause losses to the local community. The phenomenon of floods in Indonesia has become a routine thing that happens every year, almost all areas that are lowlands often flood when the rainy season arrives. Flooding is caused by high rainfall where the ability of the soil to absorb water decreases along with the rapid development of land that was once an area. In this case a study on flood discharge analysis needs to be done in order to reduce the incidence of flooding in the village of Pasi Pinang. The method used in this study is the Nakayasu HSS method, aim of this study is to determine the amount of flood discharge that occurred in the Krueng Meureubo River Basin in Pasi Pinang Village. Total hydrograph discharge calculated using the Nakayasu HSS method is the watershed area (A) = 1961.53 km, length of main river (L) = 157.02 km, time delay (tg) = 9.507 hours, duration of rain (Tr) = 7 , 13 hours, the time from the beginning of the flood to the peak of the flood hydrograph (tp) = 15.21 hours, the time of discharge 0.3 times the peak flood discharge (t0.3) = 19.01 hours and the peak flood discharge (Qp) = 23.109 m3 / sec then the total hydrograph discharge obtained by the Nakayasu method is equal to = 2040.26 m3/sec.

scholarly journals Unmanned Aerial Systems-Aided Post-Flood Peak Discharge Estimation in Ephemeral Streams

2020 ◽  
Vol 12 (24) ◽  
pp. 4183
Author(s):  
Emmanouil Andreadakis ◽  
Michalis Diakakis ◽  
Emmanuel Vassilakis ◽  
Georgios Deligiannakis ◽  
Antonis Antoniadis ◽  
...  
Keyword(s):  
Flash Flood ◽  
Traditional Approach ◽  
Peak Discharge ◽  
Unmanned Aerial Systems ◽  
Monitoring Networks ◽  
Response Dynamics ◽  
Hydrologic Modelling ◽  
Flood Peak ◽  
Field Evidence ◽  
Aerial Systems

The spatial and temporal scale of flash flood occurrence provides limited opportunities for observations and measurements using conventional monitoring networks, turning the focus to event-based, post-disaster studies. Post-flood surveys exploit field evidence to make indirect discharge estimations, aiming to improve our understanding of hydrological response dynamics under extreme meteorological forcing. However, discharge estimations are associated with demanding fieldwork aiming to record in small timeframes delicate data and data prone-to-be-lost and achieve the desired accuracy in measurements to minimize various uncertainties of the process. In this work, we explore the potential of unmanned aerial systems (UAS) technology, in combination with the Structure for Motion (SfM) and optical granulometry techniques in peak discharge estimations. We compare the results of the UAS-aided discharge estimations to estimates derived from differential Global Navigation Satellite System (d-GNSS) surveys and hydrologic modelling. The application in the catchment of the Soures torrent in Greece, after a catastrophic flood, shows that the UAS-aided method determined peak discharge with accuracy, providing very similar values compared to the ones estimated by the established traditional approach. The technique proved to be particularly effective, providing flexibility in terms of resources and timing, although there are certain limitations to its applicability, related mostly to the optical granulometry as well as the condition of the channel. The application highlighted important advantages and certain weaknesses of these emerging tools in indirect discharge estimations, which we discuss in detail.

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