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.

Aplikasi metode tahanan jenis dalam studi geologi karst Gua Seropan di Gunung Kidul, Yogyakarta

2017 ◽  
Vol 12 (2) ◽  
pp. 105-116
Author(s):  
Pulung A. Pranantya ◽  
Nurlia Sadikin
Keyword(s):  
Fresh Water ◽  
Ground Surface ◽  
Water Source ◽  
Raw Water ◽  
Limited Information ◽  
Resistivity Method ◽  
Central Java ◽  
Underground River ◽  
Initial Exploration

In terms of geology, most areas in south of the Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the existence of underground river in caves, however, indicate the potential amount of water within the area, especially in the eastern part of the Gunungkidul District. Although limited information available, some fishermen have discovered that Seropan cave contains fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using a multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The isopach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results, i.e. 110o2223.6388 EL 8o42.874 SL. [DY1][PP2][DY1]Perbaiki grammarIn terms of geology, most areas in south of Gunungkidul District in Central Java consist of the Wonosari formation limestone. The land is generally very dry and source of raw water is also difficult to reach. Findings on the exixtence of underground river in caves, however, indicate potential amount of water within the area especially in eastern part of Gunungkidul District. Although limited information available, some fishermans has discovered that Seropan cave contain fresh water source. This cave is situated at 65 m below the cliff. Initial exploration, which done using multichannel resistivity method, confirmed the availability of freshwater in the cave and underground river. The iso pach of cave depth is found in ranges of 80 200 m below the ground surface. The water of Seropan cave can be utilized by implementing pipeline or by drilling at the suggested point based on the interpretation results i.e. 110o2223.6388 EL 8o42.874 SL.[PP2]Sudah diperbaiki

scholarly journals Evaluation of flood risk as a step in determining the “Acceptable Risk” criteria. Case study: Dengkeng River, Klaten, Central Java

2021 ◽  
Vol 894 (1) ◽  
pp. 012045
Author(s):  
A Sarminingsih ◽  
M Hadiwidodo
Keyword(s):  
Control System ◽  
Return Period ◽  
Flood Risk ◽  
Flood Control ◽  
Public Works ◽  
Acceptable Risk ◽  
Performance Function ◽  
Central Java ◽  
Flood Discharge ◽  
Potential Risks

Abstract The planning of a flood control system in Indonesia is based on the planning criteria issued by the Ministry of Public Works. Flood control planning is based on flood discharge with a specific return period depending on the order of the river and the number of protected populations. Flood events in areas where the flood control system has been planned continue to occur almost every year, meaning that the probability of being exceeded is not as planned. This study is intended to evaluate the criteria for the magnitude of the designed flood discharge in flood control planning that considers the acceptable risk. Potential risks are evaluated against system reliability. The probability of failure of the flood control system occurs if the resistance is smaller than the load expressed as a performance function. By knowing the performance function associated with the level of flood risk, then the flood discharge can be selected with the appropriate return period according to the acceptable risk.

PENGEMBANGAN PELAYANAN SISTEM DISTRIBUSI AIR MINUM KOTA TEGAL

2014 ◽  
Vol 14 (1) ◽  
pp. 28-39
Author(s):  
Yustika Kusumawardani ◽  
Wiharyanti Oktiawan ◽  
Ganjar Samudro
Keyword(s):  
Distribution System ◽  
Water Pressure ◽  
Distribution Network ◽  
Water Source ◽  
Distribution Networks ◽  
Service Level ◽  
Water Supply Systems ◽  
Raw Water ◽  
Head Of Household ◽  
Central Java

Kota Tegal merupakan salah satu daerah otonom di Provinsi Jawa Tengah yang memiliki jumlah penduduk 248.722 jiwa dengan jumlah kepala keluarga sebesar 61.513. Namun dari keseluruhan jumlah penduduk tersebut tercatat hanya 11.882 pelanggan atau sekitar 19,32% penduduk yang terlayani oleh PDAM Kota Tegal dan tingkat kebocoran air sebesar 44,21%. Tekanan air pada sistem distribusi eksisting sangat rendah karena menara air yang tersedia tidak dapat difungsikan.  Kapasitas sumber air baku yang saat ini dimiliki PDAM Kota Tegal adalah 190 lt/dtk. Pengembangan jaringan distribusi sistem penyediaan air minum untuk wilayah Kota Tegal direncanakan hingga tahun 2021 dengan menggunakan sumber air baku baru yang berasal dari PDAB Jawa Tengah yaitu penambahan sebesar 200 liter/detik. Kapasitas air tersebut digunakan untuk menambah wilayah pelayanan di kecamatan Tegal Selatan, Tegal Barat, Tegal Timur dan Margadana. Pengembangan jaringan distribusi baru dapat melayani  pelanggan sambungan rumah baru sebesar 16.071 SR dengan presentase rencana pengembangan hingga 79,80 % untuk seluruh wilayah Kota Tegal.  Tingkat pelayanan pada   Kecamatan Tegal Selatan, Tegal Timur, Tegal Barat dan untuk Kecamatan Margadana adalah 20,96% 16,92%, 19,19% dan 22,72% secara berturut-turut. Perencanaan jaringan distribusi baru tersebut menggunakan pola jaringan distribusi bercabang dan tidak terkoneksi dengan sistem jaringan distribusi lama dengan total anggaran biaya sebesar Rp 17.363.693.000,00. Tegal Region determined as one of the otonomical regions located in Central Java which has 248,722 populations with the number of head of household 61,513. From that total population was recorded only 11,882 custumers, or approximately 19.32% of the population served by PDAM Tegal with a leak rate it’s about 44.21%. Moreover the water pressure on the existing distribution system is very low because the water tower can not used. Capacity of raw water source that is currently owned by PDAM Tegal is 190 l/sec. Development of distribution networks for drinking water supply systems in Tegal region is planned until the year 2021 using the new raw water sources originating from PDAB in Central Java that is equal to 200 l/sec. Water capacity is used to increase the service area in the district of Tegal Selatan, Tegal Barat, Tegal Timur and Margadana. From that new development distribution network can fullfil customer connections for 16,071 household connections by the percentage of SR development plan up to 79.80% for the entire region Tegal. Which is the service level of each district are 20.96% for Tegal Selatan subdistrict, 16.92%, Tegal Timur subdistrict, 19.19% Tegal Barat subdistrict and 22.72% for Margadana subistrict. The new distribution network planning is designed using branch pattern of the distribution network and unconnected to the old system of distribution network results the total budget about Rp 17,363,693,000.00.

scholarly journals Hydrological Characteristics of Kaligarang Watershed

2004 ◽  
Vol 14 (1) ◽  
Author(s):  
Soewarno Soewarno ◽  
Srimulat Yuningsih
Keyword(s):  
Return Period ◽  
Catchment Area ◽  
Water Volume ◽  
Runoff Coefficient ◽  
Central Java ◽  
Flood Discharge ◽  
Yearly Average ◽  
Time Of Travel ◽  
Upstream Catchment ◽  
Rising Time

This paper is a result of research concerning hydrological characteristic in the Garang Catchment Area. At present tha catchment area is often facing the problem of flooding in the dense populated area with cause a lot of loos in Semarang City. This research is aimed at studying hydrological harateristic in the Garang Catchment Area. Hydrological data are obtain from direct measurement at the stream gauging stations in the Garang Catchment Area and collected from Balai Hidrologi Office at Pusat Litbang Teknologi Sumber Daya Air in Bandung and from Hydrological Unit of Central Java Province. From this research were known the rainfall depth, their distribution and their return period; runoff coefficient; streamflow volume; dependable flow; flood discharge characteristi; and minimum discharge. From the some occuring flood indicates of the runoff coefficient is about 0.70. The water volume wasted to the sea is about 195 million m3/year. Yearly average of the dependable flow at stream gaunging stations: Garang – Pajangan  is about 2.28 m3/sec; Garang – Patemon is about 0.92 m3/sec and Kreo – Pancur is about 1.26 m3/sec. Yearly mean of annual flood discharge at Garang – Pajangan is about 435 m3/sec. The maximum capacity of river channel is about 485 m3/sec. The flood discharge characteristic are as follows: time of travel of flood is generally one km/hour approximately, rising time is about 3 hours and time of recession is about 6 – 11 hours. The floods, they are generally occur at the night. Flush flood of 1022 m3/sec occured on January 26, 1990 is estimated on 50 year return period, with 15 year return period of rainfall. The range of minimum discharge is about 0.43 – 3.15 m3/sec. The maximum discharge is about 47.2 – 1118 times of the minimum discharge. Design of the dam in Kreo River at Jatibarang and Kripik River at Mundingan, also increasing of the reforestation area in the upstream catchment are an alternative to reduce the Garang River peak flood.

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 Nilai Manfaat Ekonomi dalam Pengelolaan Sumber Daya Air Lintas Wilayah Berkelanjutan

2021 ◽  
Vol 9 (1) ◽  
Author(s):  
Hani Burhanudin ◽  
Lely Syiddatul Akliyah ◽  
Nia Kurniasari
Keyword(s):  
Water Resources ◽  
Water Resources Management ◽  
Catchment Area ◽  
Regional Cooperation ◽  
Water Source ◽  
Economic Benefits ◽  
Environmental Services ◽  
Domestic Water ◽  
Resources Management ◽  
Compensation Costs

Abstract. Water resources can be a catalyst for cross-regional cooperation that is mutually beneficial for the economic development of each region. The service provider has the authority to decide on the sustainability of water resources management collaboration. The principle is that cooperation must have a positive impact on the development of water resources areas. It is necessary to calculate the extent to which the transferred water can contribute to the sharing of the cost of recovering the catchment area of the water source. The value of the economic benefits of water is one way to formulate the extent to which cooperation in managing cross-regional water resources can be developed. Through the analysis of the value of the economic benefits of water, the price of water can be predicted so that a component of the compensation costs for environmental services will have to be paid by the water user. The analysis shows that 75% of the economic benefits of water are contributed by domestic water use with compensation costs that must be paid by the beneficiary in the amount of Rp. 3,875,590,943. If converted into conservation activities, the use of compensation for environmental services will be able to rehabilitate 30% of critical forest land in the Paniis spring catchment area. Regarding the need for funds for conservation of the catchment area of the very large Paniis water source, the allocation of water for domestic needs is worth developing. Utilization of environmental service compensation funds from this commercial aspect needs to be fully promoted so that the Kuningan-Cirebon City Regency collaboration in the field of water resources can be sustained. Keywords: value of economic benefits, domestic water, catchment area, water resources management, sustainable.Abstrak. Sumber daya air merupakan katalis kerjasama lintas wilayah yang saling menguntungkan bagi pengembangan ekonomi wilayah masing-masing. Penyedia jasa memiliki kewenangan untuk memutuskan keberlanjutan kerjasama pengelolaan sumberdaya air tersebut. Prinsipnya adalah kerjasama harus memberikan dampak positif bagi pengembangan kawasan sumber air. Diperlukan perhitungan sejauhmana air yang ditrarsfer mampu memberikan kontribusi sharing biaya pemulihan kawasan catchment area sumber air. Nilai manfaat ekonomi air adalah salah satu cara untuk merumuskan sejauhmana kerjasama dalam pengelolaan sumber daya air lintas wilayah dapat dikembangkan. Melalui analisa nilai manfaat ekonomi air, harga air dapat diprediksi sehingga akan diperoleh besaran komponen biaya kompensasi jasa layanan lingkungan yang harus dibayarkan oleh pemanfaat air. Hasil analisa memperlihatkan 75% nilai manfaat ekonomi air disumbangkan oleh pemanfaatan air domestik dengan biaya kompensasi yang harus dibayarkan oleh pemanfaat sebesar Rp. 3.875.590.943. Jika dikonversikan ke dalam kegiatan konservasi, penggunaan dana kompensasi jasa lingkungan ini mampu merehabilitasi 30% lahan hutan kritis di kawasan catchment area mata air Paniis. Terkait kebutuhan dana konservasi kawasan catchment area sumber air Paniis yang sangat besar, maka alokasi air untuk kebutuhan domestik ini layak dikembangkan. Pemanfaatan dana kompensasi jasa lingkungan dari aspek komersial ini perlu digalakan sepenuhnya agar kerjasama Kabupaten Kuningan-Kota Cirebon di bidang sumberdaya air ini dapat berkelanjutan.Kata Kunci: nilai manfaat ekonomi, air domestik, catchment area, pengelolaan sumber daya air, berkelanjutan.

scholarly journals Aplikasi Manajemen Risiko pada Pembangunan Sistem Penyediaan Air Minum (SPAM) Regional Jawa Tengah (Studi Kasus pada Pembangunan Jaringan Transmisi SPAM Regional Bregas)

2016 ◽  
Vol 21 (2) ◽  
pp. 123
Author(s):  
Hernoni Septiani ◽  
M. Agung Wibowo ◽  
Syafrudin Syafrudin
Keyword(s):  
Service Providers ◽  
Water Source ◽  
Land Acquisition ◽  
Transmission Network ◽  
Policy Recommendations ◽  
Raw Water ◽  
Network Development ◽  
Central Java ◽  
Risk Breakdown Structure ◽  
The Impact

The increasing need for drinking water and undistributed raw water source needs solution with SPAM, Central Java Region. One of it is SPAM Bregas Region which the service locations are in Brebes Districts, Tegal City, and Tegal District. In the process of the transmission network development, there come some risks that hamper so that it needs for further research. This research aims to identify risks, analyze the amount of risk probability and give policy recommendations. The responden of study are government agencies as providers the transmission pipelines development projects of Bregas Regional SPAM, also the supervision consultants and contractors as a service providers. The method used is to spread the questionnaire to each stakeholder for structuring the risk of using RBS (Risk Breakdown Structure) and multiplying the value of the impact and frequency to obtain the value of the level of risk for each risk factor. The results showed the risks that happened in transmission network development in Bregas Regional SPAM are different from each stakeholder. Risks from perception of the supervising consultant 21.95% is accepted, 18.29% mitigated, and 59.76% avoided. Risk from owner perseption 32.93% is accepted, 23.17% mitigated, and 43.90% avoided. Rizks from contractor perseption 23.17% is accepted, 29.27 mitigated, and 47.56% avoided. Overall stakeholder’s biggest risk is land acquisition.

scholarly journals Drainage System of Tegalsari Polder for Handling Flood and Tide in Tegal City Indonesia

2022 ◽  
Vol 955 (1) ◽  
pp. 012008
Author(s):  
M Yuswo ◽  
S I Wahyudi ◽  
Soedarsono ◽  
F C Boogard ◽  
E Boer
Keyword(s):  
Catchment Area ◽  
Field Data ◽  
Drainage System ◽  
Statistical Parameters ◽  
Technical Data ◽  
Central Java ◽  
Flood Discharge ◽  
Retention Basin ◽  
Central Java Province ◽  
Long Storage

Abstract Although in 2019 the local government of Tegal city Indonesia had constructed a retention basin at drainage system of Siwatu, Tegal Barat, Tegal city with a catchment area of 226 ha, the areas around the system still experienced flood and inundation. This study belonged to a descriptive qualitative research aimed to evaluate the performances of Siwatu drainage system and Tegalsari retention basin. Data of the study included field data and technical data from institutions. Based on the 15-year rainfall data (2014 – 2018) from Pemali - Comal PSDA Office, Central Java Province, Indonesia, the statistical parameters of Cs: 0.0027, Ck: 1.904, Sd: 15.91, Cv: 0.144 were obtained and so Gumbel method distribution was applied in the study, the return period rainfall of 10 years was 138 mm, the flood discharge for Qr.10 years was 9.63 m3/sec., the addition of long storage was 8×2,50×500 m, and the combination of pump addition was of 1 m3/sec. with the long storage of 8×2.00×500 m. By implementing one of the alternative choices, either flood or inundation could be resolved.

HIDROLOGICAL SIMULATION OF THE RIVERS’ FLOOD CONTROL IN SUBDISTRIC WONOKERTO IN PEKALONGAN REGENCY

Pondasi ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 148
Author(s):  
Bayu Purnama Fitra ◽  
M. Faiqun Niam
Keyword(s):  
Water Level ◽  
River Water ◽  
Flood Control ◽  
Hydrological Simulation ◽  
River Catchment ◽  
Flood Discharge ◽  
River Flood

ABSTRACT:Flooding problem still become serious problem in subdistrict Wonokerto of Pekalongan regency. There are six rivers that have the potential caused flooding in setelment area. In this research, the researcher wanted to do hydrological simulation at six rivers in Wonokerto. The hydrological simulation is done by calculating the inflow in the river in the form of flood discharge hydrograph design with nakayasu method, and evaluate the capacity of river catchment to flood discharge. Based the results research on six rivers, it is known that the river capacity is not able to accommodate the flood discharge when enters the river. The River water are also known  unable to flow by gravity caused of rob dikes that isolated the river water to flow into the sea, therefore to prevent overflow in the river needs and to prevent overflow and to control the river water level a pumping in rivers.Keywords: Hydrological Simulation, River Flood Control, Storage Evaluation, Pumping

scholarly journals Studi Penanggulangan Banjir Krueng Tripa

2019 ◽  
Vol 4 (1) ◽  
pp. 34-39
Author(s):  
Meliyana Meliyana ◽  
Ichsan Syahputra ◽  
Andhika Mahbengi ◽  
Cut Rahmawati
Keyword(s):  
Soil Conservation ◽  
Flood Control ◽  
Control Structure ◽  
Flood Events ◽  
Unit Hydrograph ◽  
Rainfall Distribution ◽  
Flood Discharge ◽  
Adverse Impacts ◽  
River Flood ◽  
Control Management

Krueng Tripa is located in 2 (two) regencies, namely Gayo Lues and Nagan Raya with total area of catchmen area is ± 3,472.95 Km2. The rainfall that affects Krueng Tripa watershed ranges from 493 mm up to 2,197 mm per year. the high rainfall effect on flood events that have caused adverse impacts on the lives of people along the river. The purpose of this study is to estimate peak flood discharge and to propose  flood control management. Analysis flood discharge using with Synthetic Unit Hydrograph (HSS) Soil Conservation Service (SCS).  The rainfall data test show that the rainfall distribution tend to follow the Gumbel, with the rate of design rainfall for 25-year return period to be 154,49 mm/day. Analysis of river flood discharge Krueng Tripa obtained Q25 = 3151,742 m3/s. The control flood recommendation of Krueng Tripa can be accomplished is a dam as flood control structure at the upstream of the river. Result of level pool routing obtained outflow hydrographs  2762,854 m3/s, resulting in a discharge reduction of 388.88 m3/s.

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