scholarly journals ANALYSIS CAPACITY OF WATERWAY IN ANEKA ELOK EAST JAKARTA

ASTONJADRO ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 322
Author(s):  
Mohammad Imam Imamuddin ◽  
Laraswati Laraswati
Keyword(s):  
Water Flow ◽  
Cross Section ◽  
Return Period ◽  
Rainy Season ◽  
Catchment Area ◽  
Research Area ◽  
Average Depth ◽  
The City ◽  
Pump House

The problem of flooding in Aneka Elok, which is located in the city of East Jakarta, is still a matter of concern, because every rainy season it is always routinely flooded. The catchment area in this study is 0,75 km<sup>2</sup> has a primary waterway that flow along the Aneka Elok area which flows northward to the reservoir and pump house. The reservoir in Aneka Elok area is located on an area of 32.000m<sup>2</sup>, is able to accommodate a flood debit of 225m<sup>3</sup> with an average depth of 4m. And has a pump capacity of 1000 liters/second as much as 2 units. With the current capacity of the reservoir and pump capacity, it is still not able to overcome the debit flood existing. This study aims to determine the existing debit in Aneka Elok area according to the return period of 5 years and 25 years, the debit flood existing in the research area, so that it can analyze the required waterway cross section and ideal pump capacity. With a return period of 5 years, the rainfall insensity of I<sub>5</sub> is 91,95 mm/hour to calculate the debit flood due the rain and compared to the debit existing flood, it is found that thecapacity of the existing waterway at C1-C2, C4-C9 and C11 is not sufficient to accommodate the current debit flood, so it is necessary to modify the waterway dimension. With a return period of 25 years, the rainfall insensity I<sub>25</sub> is 169,66 mm/hour to calculate the pump capacity, it is found that current capacity is still not sufficient so that it is necessary to increase the pump capacity from 2 m<sup>3</sup>/s to 3,5 m<sup>3</sup>/s to accelerate water flow.

scholarly journals Evaluasi Kapasitas Saluran Drainase di Catchment Area Sub Sistem Bendul Merisi Kota Surabaya

UKaRsT ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 84
Author(s):  
Danayanti Azmi Dewi Nusantara
Keyword(s):  
Population Density ◽  
Cross Section ◽  
Channel Capacity ◽  
Catchment Area ◽  
Flood Management ◽  
Drainage Channel ◽  
Urban Village ◽  
Flood Volume ◽  
The City ◽  
Water Overflow

Bendul Merisi is a densely populated urban village located in the city of Surabaya with a population density, which until 2014 reached 12,477 inhabitants. The drainage channel in Bendul Merisi is unable to collect rainwater, causing water overflow in the drainage canal. The way to overcome flood is to increase the capacity of the channel. Evaluation of drainage channel capacity in Bendul Merisi is needed for flood management. The purpose of this study is to find out the amount of capacity of the drainage channel, so flood can be overcome, can find out the results of the evaluation of flood volume for the next 2 years with the existing channel capacity. The results of this study are the dimensions of the tertiary channel 2 using a width of 1.9 m and a depth of 2.1 m; quarterly channel 1 uses a width of 0.6 m and a depth of 1.5 m; Q2 channel uses a width of 2 m and a depth of 2.98 m. The expansion of the cross-section is expected to be overcome.Bendul Merisi merupakan kelurahan padat penduduk yang terletak di Kota Surabaya dengan kepadatan penduduk yang sampai pada tahun 2014 mencapai 12.477 jiwa. Saluran pembuang di Bendul Merisi tidak mampu menampung air hujan  sehingga mengakibatkan meluapnya air di saluran pembuang banjir. Cara penanggulangan banjir adalah memperbesar kapasitas saluran. Evaluasi kapasitas saluran drainase di Bendul Merisi diperlukan, untuk penanganan banjir. Tujuan dari penelitian ini dapat mengetahui jumlah kapasitas tampungan saluran drainase, sehingga bajir dapat teratasi, dapat mengetahui hasil evaluasi volume banjir untuk 2 tahun yang mendatang dengan kapasitas saluran yang ada. Hasil penelitian ini adalah dimensi saluran tersier 2 menggunakan lebar 1,9 m dan kedalaman 2,1 m; saluran kuarter 1 menggunakan lebar 0,6 m dan kedalaman 1,5 m; saluran kuarter 2 menggunakan lebar 2 m dan kedalaman 2,98 m. Pembesaran penampang diharapkan banjir dapat teratasi.

scholarly journals Oddziaływanie przepustu na warunki hydrauliczne przepływu wody w głównym rowie systemu odwadniającego stopnia wodnego Łączany

2017 ◽  
Vol 26 (1) ◽  
pp. 28-37
Author(s):  
Agata Majerczyk ◽  
Bogusław Michalec
Keyword(s):  
Water Flow ◽  
Cross Section ◽  
Catchment Area ◽  
Drainage System ◽  
Flow Conditions ◽  
Vistula River ◽  
Hydraulic Conditions ◽  
The Impact ◽  
Heavy Rains

The aim of the study is to analyze the impact of the culvert on the hydraulic conditions of water flow in the “R” ditch. The culvert was located on the main ditch in drainage system of Łączany barrage on the Vistula river. The research on ditch’s capacity in analyzed cross-section showed that the capacity decreased. The changes of cross-section caused by construction of the culvert substantially affect the flow conditions of water in the channel. The calculations showed that the existing dimension of culvert is not enough to pass the reliable discharge. The reliable flow was set for catchment area of 3.32 km2, not 0.67 km2, which is bigger than catchment area estimated in drainage project. It includes watercourses leading water to ditch with surrounds Kasztelan Pond, and then to “R” ditch. Discharges larger than 2.27 m3·s–1, particularly reliable flow, reach banks of the ditch “R” and flows out the channel. Discharges larger than the reliable discharge do not fit into the analyzed cross-section causing pouring out the water from the channel. On the basis of information taken from the locals and serving the system it is known that such a phenomenon occurs during the periods of heavy rains and floods.

scholarly journals Parking Places to Moped-Style Scooter Sharing Services Using GIS Location-Allocation Models and GPS Data

2021 ◽  
Vol 10 (4) ◽  
pp. 230
Author(s):  
Onel Pérez-Fernández ◽  
Juan Carlos García-Palomares
Keyword(s):  
Global Positioning System ◽  
Catchment Area ◽  
Public Spaces ◽  
Gps Data ◽  
Positioning System ◽  
Urban Centers ◽  
Location Allocation ◽  
Global Positioning ◽  
The City

Moped-style scooters are one of the most popular systems of micro-mobility. They are undoubtedly good for the city, as they promote forms of environmentally-friendly mobility, in which flexibility helps prevent traffic build-up in the urban centers where they operate. However, their increasing numbers are also generating conflicts as a result of the bad behavior of users, their unwarranted use in public spaces, and above all their parking. This paper proposes a methodology for finding parking spaces for shared motorcycle services using Geographic information system (GIS) location-allocation models and Global Positioning System (GPS) data. We used the center of Madrid and data from the company Muving (one of the city’s main operators) for our case study. As well as finding the location of parking spaces for motorbikes, our analysis examines how the varying distribution of demand over the course of the day affects the demand allocated to parking spaces. The results demonstrate how reserving a relatively small number of parking spaces for scooters makes it possible to capture over 70% of journeys in the catchment area. The daily variations in the distribution of demand slightly reduce the efficiency of the network of parking spaces in the morning and increase it at night, when demand is strongly focused on the most central areas.

Natural and anthropogenic impacts on the composition of lake sediments

2008 ◽  
Vol 72 (1) ◽  
pp. 411-413 ◽  
Author(s):  
T. Eskola ◽  
V. Peuraniemi
Keyword(s):  
World War Ii ◽  
Lake Sediments ◽  
Human Impact ◽  
Catchment Area ◽  
Anthropogenic Impacts ◽  
Heavy Traffic ◽  
World War ◽  
Small Lakes ◽  
Anthropogenic Effect ◽  
The City

AbstractLake sediments were studied from four lakes in environmentally different areas in northern Finland. Lakes Pyykösjärvi and Kuivasjärvi are situated near roads with heavy traffic and the city of Oulu. Lakes Martinlampi and Umpilampi are small lakes in a forest area with no immediate human impact nearby. The concentration of Pb increases in the upper parts of the sedimentary columns of Lake Kuivasjärvi and Lake Pyykösjärvi. This is interpreted as being an anthropogenic effect related to heavy traffic in the area and use of Lake Pyykösjärvi as an airport during World War II. High Ni and Zn concentrations in the Lake Umpilampi sediments are caused by weathered black schists. Sediments in Lake Martinlampi show high Pb and Zn contents with increasing Pb concentrations up through the sedimentary column. The sources of these elements are probably Pb-Zn mineralization in the bedrock, Pb-Zn-rich boulders and anomalous Pb and Zn contents in till in the catchment area of the lake.

scholarly journals The Model for Dilution Process of Landslide Triggered Debris Flow —A Case of Guanba River in Tibet Southeastern Plateau

2018 ◽  
Vol 22 (2) ◽  
pp. 103-111 ◽  
Author(s):  
Jun Li ◽  
Ningsheng Chen
Keyword(s):  
Debris Flow ◽  
Water Flow ◽  
Debris Flows ◽  
Evaluation Model ◽  
Flow Density ◽  
Flow Section ◽  
Average Depth ◽  
Flow Discharge ◽  
Study Results ◽  
Density Evaluation

Understanding and modeling the downstream dilution process of a landslide triggered debris flow is the foundation for recognizing the boundary condition and dilution mechanism of this type of debris flow, and this serves as the theoretical basis for the categorized control of viscous debris flows, diluted debris flows, hyperconcentration flows and flash floods in a drainage basin. In this study, taking as an example a typical debris flow that occurred in the Guanba River on Tibet’s southeastern plateau on July 6th, 1998, empirical models are used to calculate the density, water flow discharge, debris flow discharge, average depth of loose materials and channel gradient at 11 cross-sections upstream to downstream in the debris flow. On this basis, the dilution characteristics and debris flow dilution process are analyzed in this study. According to the correlation between the debris flow density and the water-soil ratio and channel gradient, we have established the density evaluation model for the debris flow dilution process, which can predict the dilution process of a landslide triggered debris flow. The study results include the following four aspects: (1) The key factors in the dilution process of landslide triggered debris flows are the water flow discharge, average depth of loose materials and channel gradient. (2) The debris flow dilution characteristics in the Guanba River in 1998 include the occurrence of the debris flow dilution process after a significant increase in the water-soil ratio; an increase in the proportion of fine particles after dilution of the debris flow; and the size distribution of grain is “narrowed.” (3) In accordance with the density and dilution characteristics, the debris flow dilution process in the Guanba River can be divided into the upstream viscous debris flow section, midstream and downstream transitional debris flow section and downstream diluted debris flow section. (4) The density evaluation model for the debris flow dilution process is expressed by the Lorentz equation, and this model can reflect the debris flow dilution process such that the debris flow density will decrease gradually with an increase in the water-soil ratio and decrease in channel gradient. The density evaluation model for the debris flow dilution process has been verified by three debris flow cases, which include Gaoqiao Gully, Haizi Valley, and Aizi Valley

scholarly journals ANALISIS TINGGI MUKA AIR BANJIR DAS BELAWAN DENGAN MENGGUNAKAN SOFTWARE HECRAS

2018 ◽  
Vol 7 (1) ◽  
pp. 26-29
Author(s):  
Asril Zevri
Keyword(s):  
Water Level ◽  
Cross Section ◽  
Return Period ◽  
Industrial Development ◽  
Daily Rainfall ◽  
Flood Water ◽  
Flood Discharge ◽  
Flood Level ◽  
Maximum Daily Rainfall ◽  
River Cross Section

Abstract: Belawan River Basin is one of the watershed, which currently change the land use because of the increasing population and industrial development. Rainfall with high intensity can cause rapid runoff, causing flood around the plains of the river cross section. The purpose of this research is to determine the flood water level of Belawan Watershed and flood discharge return period. Scope of activity in this research is analyzing daily rainfall Belawan watershed with the flood-discharge return period. Scope of activity in this research is analyzing maximum daily rainfall Belawan Watershed, and simulating flood water level with HECRAS. The result of the study shows that the potency of Belawan watershed flood water level is caused by flood discharge at 25 to 100 years especially in the middle to downstream of river cross section that is between 0.7 m and 3.3 m. Keywords: Flood Discharge, Flood Level, Belawan Watershed, Software HECRAS. Abstrak: Daerah Aliran Sungai Belawan adalah salah satu DAS yang pada saat ini mengalami perubahan tata guna lahan seiring bertambahnya jumlah penduduk dan perkembangan industri. Curah hujan yang tinggi dapat mengakibatkan limpasan sehingga menimbulkan tinggi muka air banjir di sekitar dataran penampang sungai. Tujuan dari penelitian ini adalah untuk mensimulasi tinggi muka air banjir DAS Belawan dengan debit banjir periode kala ulangnya. Lingkup kegiatan dalam penelitian ini yaitu menganalisa curah hujan harian maksimum rata-rata DAS Belawan dan menganalisa debit banjir kala ulang 2 sampai dengan 100 tahun, mensimulasi tinggi muka air banjir dengan HECRAS. Hasil studi menunjukan potensi tinggi muka air banjir DAS Belawan terjadi akibat debit banjir periode kala ulang 25 sampai dengan 100 tahun khususnya  di bagian tengah sampai hilir penampang sungai yaitu berkisar antara 0.7 m sampai dengan 3.3 m. Kata kunci: Debit banjir, Tinggi Banjir, DAS Belawan, Software HECRAS.

scholarly journals Penentuan Volume Batubara Menggunakan Metode Cross Section di PT. Astri Mining Resources Cabang Batu Ampar Kalimantan Selatan

2017 ◽  
Vol 14 (2) ◽  
pp. 125
Author(s):  
Megawati Megawati ◽  
Sri Cahyo Wahyono ◽  
Fahruddin Fahruddin
Keyword(s):  
Cross Section ◽  
Research Area ◽  
Plant Residues ◽  
Volume Calculation ◽  
Processing Software ◽  
Image Processing Software ◽  
Drill Point ◽  
Point Data ◽  
Organic Deposits ◽  
Cross Section Method

Coal is a combustible sedimentary rock formed from organic deposits of plant residues and carbon, hydrogen and oxygen elements. Modeling of 3D coal distribution and coal volume calculation plays an important role in the exploration because the result of coal volume calculation can be used as consideration for mining. This research uses 6 drill point and calculation of coal volume using cross section method with the help of image processing software that is rockwork16. The result of interpretation of drill point data in the research area were 5 types of rock layers with each rock volume is claystone (25.840.000 m3), claysand (230.00 m3), Coal (5.930.000 m3), carbonaceus clay and soil.

scholarly journals The Simulation Of Return Period Design Flood At KG2 Setail Storage Planning In Yosomulyo Village Gambiran Sub District Banyuwangi

2020 ◽  
Vol 1 (1) ◽  
pp. 30-42
Author(s):  
Yuda Pratama Gumelar ◽  
Zulis Erwanto ◽  
Andi Wijanarko
Keyword(s):  
Cross Section ◽  
Return Period ◽  
Design Flood ◽  
Analysis System

Berdasarkan Peraturan Daerah Kabupaten Banyuwangi Nomor 08 Tahun 2012 Tentang Rencana Tata Ruang Wilayah Kabupaten Banyuwangi Tahun 2012 terkait pengembangan waduk dan embung. Untuk memenuhi kebutuhan air irigasi di Desa Yosomulyo diperlukan pembangunan embung Setail KG2. Tujuan penelitian adalah untuk mengetahui hasil simulasi debit banjir rancangan kala ulang pada perencanaan Embung Setail KG2 menggunakan bantuan program HEC-RAS. Untuk perhitungan debit banjir kala ulang menggunakan metode Rasional. Untuk simulasi banjir rancangan dengan menggunakan bantuan program HEC-RAS (Hidrology Engineering Center – River Analysis System) dengan memasukkan cross section embung. Dari hasil simulasi banjir dengan bantuan program HEC-RAS pada perencanaan Embung Setail KG2 dengan debit rancangan kala ulang 1 tahun sebesar 41,21 m3/det, kala ulang 2 tahun sebesar 90,30 m3/det, kala ulang 5 tahun sebesar 112,78 m3/det, kala ulang 10 tahun sebesar 125, 16 m3/det, kala ulang 20 tahun sebesar 136,29 m3/det dan kala ulang 25 tahun sebesar 138,63 m3/det, tidak ada air yang meluap pada desain penampang sehingga perencanaan Embung Setail KG2 dapat disimpulkan mampu menampung debit banjir hingga kala ulang 25 tahunan sesuai dengan perencanaan awal dengan volume kapasitas embung 384,37x103 m3.

scholarly journals Using Hydrological Mapping to Evaluate the Effectiveness of the Bener Dam Development in Reducing Flood Risk in Purworejo Regency, Central Java

2020 ◽  
Vol 34 (2) ◽  
Author(s):  
Sudaryatno Sudaryatno ◽  
Bagus Wiratmoko ◽  
Winanda Winanda ◽  
Shelly Yeni Saputri
Keyword(s):  
Remote Sensing ◽  
Rainy Season ◽  
Catchment Area ◽  
Local Community ◽  
Remote Sensing Data ◽  
Peak Discharge ◽  
Economic Losses ◽  
Dam Reservoir ◽  
Central Java ◽  
Concentration Time

The Bogowonto Hulu sub-watershed has high flooding potential, especially during the rainy season. This flooding causes physical, social, and economic losses for the local community and so the Bener Dam was built to reduce the volume of flooding in the area. This research aims to find out the effectiveness of the Bener Dam in overcoming the problem of flooding around the Bogowonto Hulu sub-watershed. The effectiveness of dams can be analysed by comparing the volume of the dam reservoir with the peak discharge amount generated. The value of peak discharge can be obtained using remote-sensing data and mathematical calculations following the rational method. Using this method, the estimated peak discharge value obtained for the watershed was 302.3 m3/s while the value of dam capacity was only 210 m3/s, giving 92.3 m3/s of flooding potential. It is necessary to reduce the potential for flooding by building an IR reservoir in the catchment area, so that rainwater is accommodated rather than being immediately depleted, and to reduce concentration time.

scholarly journals KAJIAN POTENSI HIDROLOGI EMBUNG IRIGASI WAE ROBANG DI KABUPATEN ROTE NDAO

2016 ◽  
Vol 13 (2) ◽  
Author(s):  
Siti Nurasiyah
Keyword(s):  
Return Period ◽  
Rainy Season ◽  
Irrigation Area ◽  
Design Capacity ◽  
Flood Discharge ◽  
Excess Water ◽  
Discharge Plan ◽  
Reservoir Design ◽  
Retention Basin ◽  
Basin Area

KAJIAN POTENSI HIDROLOGI EMBUNG IRIGASI WAE ROBANG DI KABUPATEN ROTE NDAOStudy The Potential Of Hidrology Wae Robang Irrigation Retention Basin In Rote Ndao DisrtrictSiti NurasiyahDepartemen Pendidikan Teknik Sipil, Universitas Pendidikan Indonesiaemail: [email protected] Ndao District is one of the districts in the province of NTT, which has a fairly extensive irrigation areas and potential but less discharge to irrigate the irrigation area. Rote Ndao District has topography is hilly and much of the basin area can hold water, so one way to solve this problem is to build retention basin to hold excess water during the rainy season. Wae Robang retention basin is one of the retention basin will be built in Rote Ndao District. One aspect that must be examined in the planning of retention basin is hydrological analysis. The purpose of the analysis of hydrology at the location of Robang Wae retention basin is to assess the potential of existing hydrological includes inflows fill retention basin, retention basin reservoirs, and flood discharge plan. From the results of the hydrological analysis showed that the volume of water that can fill an Wae Robang retention basin during the rainy season amounted to 1,774,029 m3, retention basin reservoir design capacity Wae Robang retention basin amounted to 1,348,859 m3, and the flood discharge plan with a return period of 50 years for the spillway Wae Robang retention basin amounted to 21.71 m3/ sec.Keywords: Wae Robang, retention basin, hydrologi AbstrakKabupaten Rote Ndao merupakan salah satu kabupaten di provinsi NTT yang memiliki areal irigasi yang cukup luas dan cukup potensial tetapi kekurangan debit air untuk mengairi areal irigasi tersebut. Kabupaten Rote Ndao ini memiliki kondisi topografi yang berbukit-bukit dan banyak daerah cekungan yang dapat menampung air, maka salah satu cara untuk menanggulangi masalah ini adalah dengan membangun embung yang berguna untuk menampung air yang berlebihan pada waktu musim hujan. Embung Wae Robang merupakan salah satu embung yang akan dibangun di Kabupaten Rote Ndao. Salah satu aspek yang harus ditelaah dalam perencanaan embung adalah analisis hidrologi. Tujuan dari analisis hidrologi di lokasi embung Wae Robang ini adalah untuk mengkaji potensi hidrologi yang ada meliputi aliran masuk yang mengisi embung, tampungan embung, dan debit banjir rencana. Dari hasil analisis hidrologi didapatkan bahwa volume air yang dapat mengisi kolam Embung Wae Robang selama musim hujan adalah sebesar 1.774.029 m3, kapasitas tampung desain embung Wae Robang adalah sebesar 1.348.859 m3, dan debit banjir rencana dengan kala ulang 50 tahun untuk pelimpah embung Wae Robang adalah sebesar 21,71 m3/det.Kata kunci : Wae Robang, embung, hidrologi

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