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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan MEDIA KOMUNIKASI TEKNIK SIPIL Bangunan JMTS: Jurnal Mitra Teknik Sipil Jurnal Teknik Indonesia Journal of Literature Review
Ratih Pujiastuti
Universitas Darul Ulum Islamic Centre Sudirman GUPPI
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Social Sciences Transportation Other

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Pengaruh Land Subsidence terhadap Genangan Banjir dan Rob di Semarang Timur Pujiastuti, ratih; Suripin, Suripin; Syafrudin, Syafrudin
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 21, Nomor 1, JULI 2015
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3892.319 KB) | DOI: 10.14710/mkts.v21i1.11225

Abstract

Inundation of flood and rob (flood due to high tides) in Semarang City is increase wtithin area and depth. It be more seroius condition because of land subsisdence that happened in coastal area of Semarang City. This research is foccused on prediction and mapping of inundation flood and rob due to land subsidence effect in East Semarang, especially Tenggang Watershed and Sringin Watershed. On this research, data analysis including analysis of land subsidence, analysis of hydrological data, analysis of flood discharge with HEC-HMS, hydraulics analysis with HEC-RAS and then mapping the results of the flood inundation with Arc GIS. The inundation will be create with overlay the DEM of flood water level and DEM of topographic. According to the results of analysis is known that minimum land subsidence is 0 cm/year that happened in south area of Semarang and more higher ini north area with maximum land subsidence is 5.58 cm/year. On periode   2014-2031, the contribute of land subsidence to increase the inundation of flood and rob is 1.39%/year.
Analisis Multi Kriteria Pos Hujan dan Pos Debit dengan Metode Stepwise pada DAS Bd. Katulampa Ratih Pujiastuti; Undayani Cita Sari
BANGUNAN Vol 25, No 1 (2020): BANGUNAN EDISI MARET
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um071v25i12020p1-8

Abstract

Abstrak:Dalam suatu WS/DAS, pos pencatatan curah hujan biasanya lebih banyak ditemui dibandingkan dengan pos pencatatan debit. Banyaknya jumlah pos hujan menimbulkan permasalahan dalam biaya operasi dan pemeliharaan. Penelitian ini bertujuan untuk menentukan pos hujan yang paling berpengaruh pada DAS Bd. Katulampa. Analisis dilakukan dengan metode Stepwise yang merupakan analisis multi correlation, dalam hal ini data hujan bulanan sebagai variabel bebas dan data debit bulanan sebagai variabel tidak bebas. DAS Bd. Katulampa dipengaruhi oleh 13 pos hujan. Akan tetapi karena keterbatasan data, analisis dilakukan pada 5 Pos Hujan yaitu Pos Perkeb. Gn. Mas, Pos Gunung Mas, Pos Panjang, Pos Pasir Muncang dan Pos Katulampa. Hasil analisa dengan multi correlation menunjukkan bahwa pertambahan nilai korelasi bertambah dari kombinasi 2,3 dan 4 pos hujan. Akan tetapi pada kombinasi 5 pos hujan, pertambahan nilai korelasi tidak lagi signifikan. Hal ini bisa disimpulkan bahwa pada DAS Bd. Katulampa, pencatatan pos hujan cukup terwakili dengan kombinasi 4 pos hujan antara lain Pos Perkeb. Gn. Mas, Pos Panjang, Pos Pasir Muncang dan Pos Katulampa. Kombinasi 4 pos hujan ini kemudian di cek dengan standar WMO. Polygon thiessen yang dihasilkan 4 pos hujan hasil analisis, menghasilkan luas pengaruh pos hujan maksimum adalah 50.57 km2 yaitu Pos Pasir Muncang dan minimum 15.46 km2 Pos Katulampa. Artinya dengan 4 pos hujan tersebut, luas pengaruh pos hujan masih masuk dalam ketentuan yang disyaratkan oleh WMO.Kata-kata kunci: pos hujan, pos debit, multi correlation, stepwiseAbstract:In a WS / DAS, the rainfall recording post is usually more common than the debit recording post. The large number of rain stations has caused problems in operating and maintenance costs. This study aims to determine the most influential rainfall items in the watershed Bd. Katulampa. The analysis was carried out using the Stepwise method which is a multi correlation analysis, in this case monthly rainfall data as the independent variable and monthly discharge data as the dependent variable. DAS Bd. Katulampa is affected by 13 rain posts. However, due to data limitations, the analysis was carried out on 5 Rain Posts, namely Perk Perkeb. Mt. Mas, Gunung Mas Post, Pos Panjang, Muncang Sand Post and Katulampa Post. The results of the analysis with multi correlation show that the correlation value increases from the combination of 2.3 and 4 rain posts. However, in the combination of 5 rain posts, the correlation value is no longer significant. It can be concluded that in the watershed Bd. Katulampa, the recording of rain posts is adequately represented by a combination of 4 rain posts, including the Pos Perkeb. Mt. Mas, Long Post, Muncang Sand Post and Katulampa Post. The combination of the 4 rain posts is then checked with the WMO standard. Polygon Thiessen produced by 4 analysis results, the maximum area of influence is 50.57 km2, that is Pasir Muncang Post and minimum 15.46 km2 Katulampa Post. This means that with the 4 rain posts, the broad influence of the rain post is still included in the conditions required by the WMO.Keywords: rain post, debit post, multi correlation, stepwise.
STUDI SEDIMENTASI GUNA PENENTUAN UMUR RENCANA WADUK PADA WADUK JATIBARANG KOTA SEMARANG: Umur Rencana Waduk Ratih Pujiastuti; fitria pra; Risdiana Cholifatul Afifah
JMTS: Jurnal Mitra Teknik Sipil Volume 6, Nomor 3, Agustus 2023
Publisher : Prodi Sarjana Teknik Sipil, FT, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jmts.v6i3.23685

Abstract

Salah satu permasalahan pada operasional sebuah waduk adalah sedimentasi. Kapasitas tampungan waduk dipengaruhi oleh volume sedimen yang masuk ke waduk. Akibat sedimentasi dapat berpengaruh terhadap umur waduk. Untuk menanggulangi permasalahan sedimentasi pada waduk perlu diketahui perkiraan volume sedimen yang masuk ke waduk. Analisis jumlah sedimen yang masuk ke Waduk Jatibarang dilakukan dengan menjumlahkan total sedimen layang dan sedimen dasar. Simulasi dilakukan selama umur rencana waduk yaitu 50 tahun. Sedimen layang dihitung dengan menurunkan persamaan dari data pengukuran debit air dan konsentrasi sedimen. Sedimen dasar dianalisis melalui pendekatan rumus empirik dari Meyer-Petter Muller. Adapun total perkiraan sedimen yang masuk ke waduk selama 50 tahun adalah sebesar 7.629.799,05 m3. Selanjutnya perhitungan sedimen yang mengendap dilakukan dengan metode trap efficiency oleh Brune dan menghasilkan nilai sebesar 6.643.514,71 m3. Dari perhitungan diketahui volume akhir waduk pada tahun ke-50 adalah 13.756.485,29 m3. Sedimen yang mengendap di waduk diperkirakan sebesar 132.870,29 m3 per tahun. Dengan menggunakan data volume dead storage berdasar data teknis waduk 6.800.000 m3, dihitung sisa volume yang ada yaitu sebesar 156.485,29 m3. Perhitungan sisa umur waduk diperoleh dengan membandingkan sisa volume dengan volume sedimen per tahun. Berdasarkan hasil analisa, dapat disimpulkan bahwa rencana umur Waduk Jatibarang adalah 51,1 tahun. Kata Kunci: sedimentasi, sedimen layang, sedimen dasar, trap efisiensi, Waduk Jatibarang
REDESAIN BENDUNG KEDUNG JERUK KECAMATAN PRINGAPUS KABUPATEN SEMARANG Paryanto, Paryanto; Putro, Wibisono Handoko; Apriyanto, Totok; Pujiastuti, Ratih
Jurnal Teknik Indonesia Vol 3, No 2 (2022): JEI (Jurnal Engineering Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v3i2.366

Abstract

Water is one an important element that can affect life in nature. To increase water resources, a long-term and short-term strategy is needed. Kelampok River has not been utilized optimally by the community. For this reason, it is necessary to build a weir that serves to raise water level. The planning for the construction of the Kedung Jeruk Weir in Pringapus District, Semarang Regency aims to improve the socio-economic environment in the surrounding area.The redesign is based on secondary data with other supporting data. The analyzes carried out include: hydrological analysis, planning dimensional, analysis of the stability of the weir body, and the safety of the weir body.From the results of the hydrological analysis which includes the calculation of planned rainfall using the Thiesen Polygon method and flood discharge using the Synthetic Unit Hydrograph (HSS) Gama 1 method, the water requirement for irrigation in Pringapus Village is 0.3091 m3/s and the 50th flood discharge is 206, 01 m3/s. Weir width 36 m with 0.83 m high weir. The width of the weir crest is 30.4 m, the flushing width is 3.6 m and the pillar width is 2 m (2 Pillars 1 m each). The radius of the weir of the round threshold type is 0.8 m, the stilling pool type is USBR Type III with a length of 9 m. The value of stability during normal water conditions and flood water conditions is still above the safety value so that the weir building meets the requirements and is safe.
PENELUSURAN BANJIR KOLAM RETENSI SUSUKAN KECAMATAN UNGARAN TIMUR KABUPATEN SEMARANG Khairul, Anita; Fatmawati, Diyah; Pujiastuti, Ratih; Apriyanto, Totok
Jurnal Teknik Indonesia Vol 4, No 2 (2023): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v4i2.493

Abstract

Floods are natural disasters that occur in an area due to the inability of drainage channels or many rivers, in overcoming the flooding problem that occurred a problem that occurred in, Susukan District, East Ungaran District, the Semarang Regency Government has taken action by constructing a retention pond. This research aims to analyze the capacity of the retention pond.This research required data: topographic data, rainfall data and geotechnical soil data. The analysis carried river watershed and hygrological analysis which includes: determining average rainfall, planned flood discharge, flood routing and calculating the stability of the spillway building.From the results of the hydrological analysis, the flood discharge value obtained using the gamma I unit hydrograph method for a 5-year return period was 21,53 m3/second. In flood investigations, an outflow value of 21.11 m3/second was obtained with an overflow height of 1,65 m.
PENINGKATAN JARINGAN IRIGASI DAERAH IRIGASI KRIPIK KOTA SEMARANG Irvan, Muhamad; Nurwakhid, Nurwakhid; Apriyanto, Totok; Pujiastuti, Ratih
Jurnal Teknik Indonesia Vol 4, No 1 (2023): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v4i1.416

Abstract

Water is a very basic need for All living things on this earth without exception. The Kripik River is currently not being utilized by community optimally. For this reason, it is necessary to increase Irrigation Area which aims to increase agricultural production. Currently, the Bendung Kripik area serves an irrigation area of 95,94 Ha with the height of the exsisting weir lighthouse is 1 m.The improvement of the irrigation network is carried out based on secondary data with other supporting data. The analysis carried out includes: hydrological analysis which includes : watershed, maximum rainfall, flood discharge, average rainfall, average climatology, Eto – Penman, F.J Mock mainstay discharge, planting patterns then carried out channel design, weir design and calculation of weir stability.In this study, it was proposed to increase the rice field area by 130.17 Ha From the results of hydrological analysis, the flood discharge value of the Nakayasu Synthetic Unit Hydrograph (HSS) method was obtained when repeating 100 th by 40.10 m3 / s. The water requirement for irrigation of D.I Kripik after the addition of the area is 0.086 m3 / s. As for the bed, a weir width of 30 m with a weir height of 1.05 m is required, a weir lighthouse width of 28 m, a rinse width of 1 m and a pillar width of 1 m (2 Pillars of 1 m each). The radius of the spherical threshold type weir is 0.5 m, the olak pond type is USBR Type IV with a length of 3.50m. Keywords: Irrigation, Weir, Flood Discharge
ANALISA SENSITIVITAS DURASI HUJAN PADA PERHITUNGAN DEBIT BANJIR DAS TENGGANG DAN SRINGIN Pujiastuti, Ratih; Risna, Nevy
Jurnal Teknik Indonesia Vol 3, No 1 (2022): JEI (Jurnal Engineering Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v3i1.363

Abstract

Design flood is one of the important aspects in the design of water structures. Calculation of the design flood is very dependent on the existing rain data in the watershed area. The amount of flood discharge is not only influenced by the value of rainfall but also depends on the duration and distribution of rainfall per unit of time.This study was conducted to determine duration of rainfall that produces the maximum flood discharge for Tenggang and Sringin River. Calculation of flood discharge for Tenggang and Sringin River was carried out using a rainfall distribution pattern (hyetograph) for rainfall durations of 2 hours, 3 hours, 4 hours and 5 hours with the distribution of rainfall distribution referring to hourly rain data at Maritime Station. Results of analysis show that different distributions are produce different flood discharge values. For Tenggang and Sringin rivers, the maximum flood discharge value is obtained at a rain duration of 2 hours.Keywords: flood discharge, rainfall duration, hyetograph
REDESIGN SHORE PROTECTION KAWASAN INDUSTRI KENDAL (KIK) Rizal, Fachri Fatkhur; Sulistriono, Endro; Apriyanto, Totok; Pujiastuti, Ratih
Jurnal Teknik Indonesia Vol 5, No 1 (2024): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v5i1.546

Abstract

Abrasion incidents on the coastline in the KIK area continue to occur and cause the area boundaries to decline. so that appropriate coastal protection structures are needed. The aim of this research is to carry out re-planning in the Kendal Industrial Area (KIK) in the future area boundary plan. In carrying out this research, daily wind data for the period 2017 - 2023 is needed from a nearby location, namely the Tanjung Emas Maritime Meteorological Station, Semarang. The analysis carried out includes fetch, windrose, wave calculations, building design and force calculations in shore protection construction. From the results of the windrose analysis, the dominant wave direction is northwest. Analysis of waves in the deep sea obtained a height value of 2.45 m and a wave period of 8.32 sec. Based on the calculation results, breaking waves will occur at a depth of 2.02 m. Because the building location is at a depth of 2m, where breaking waves occur, the breaking wave height is used in building planning. The coastal protection building chosen is shore protection construction or a tetrapod sea wall. Peak elevation of 4.76 meters, peak width of 3.55 meters, building base length of 22.45 meters, back slope of 1:1, arm slope of 1:2, the first type of protective layer material uses tetrapods, second and third layer using split stone pairs with 2 size combinations.
DISTRIBUSI SEDIMEN PADA WADUK JATIBARANG, KOTA SEMARANG Lestari, Fitria Maya; Pujiastuti, Ratih; Afifah, Risdiana Cholifatul
Jurnal Teknik Indonesia Vol 5, No 2 (2024): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v5i2.662

Abstract

The main issue in the operation of reservoirs is sedimentation. This can lead to silting and affect the reservoir's storage capacity. The distribution of sediments needs to be understood in order to gain an overview of their spread, so that measures can be taken to address sediment-related issues in the Jatibarang Reservoir. The analysis was conducted using sediment data from previous studies, which reported a total sediment volume of 6.64 million m³ over a period of 50 years. Based on topographic data, it was found that the Jatibarang Reservoir is classified as Type III, with a "hill" classification. The analysis results showed that the dimensionless factor F is 0.22, with a relative depth p of 0.53. Based on the sediment distribution analysis of the Jatibarang Reservoir with Empirical Area Reduction Method, it was found that after 50 years of operation, the new zero elevation of the reservoir would be at an elevation of +126.82 m. In comparison with the low water surface elevation at the existing dead storage of the Jatibarang Reservoir, which is at +136 m, it can be concluded that the Jatibarang reservoir can operate according to the planned lifespan and can still function for more than 50 years
DESAIN KOLAM PEREDAM ENERGI BENDUNG PLAOSAN KABUPATEN SEMARANG Afrida, Eric; Apriyanto, Totok; Pujiastuti, Ratih
Jurnal Teknik Indonesia Vol 4, No 1 (2023): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v4i1.414

Abstract

Hydraulic aspect of the weir is important factors in planning a stilling basin. Remaining energy on the stilling basin is expected to be as minimal as possible so that scour does not occur on the river bed. Plaosan Weir does not yet have a stiiling basin structure. Therefore it is necessary to recommend the design of stiliing basin.The analysis carried out hydrological analysis, including calculating return period rainfall, flood discharge (Q) using the Haspers method, and calculating Froude number (Fr) to determine pond type. Based on the recommendations for the type of stilling basin, a building design is carried out and also stability of design..From the results of calculation it is obtained that 50-year return period rainfall is 108.68 mm. Planned discharge for 50 years is 186.06 m3/s, and froude number : 4. The appropriate type of stilling basin is USBR Type IV. The pond is planned to have a length of L = 17 m, with a block face width of 0.68 m, height of 1.36 m, distance between front blocks of 1.69 m and total of 13 pieces. The results of stability control analysis during normal water conditions and flood water conditions produce values above the safety factor so that it can be concluded that the design is planned qualify.
Co-Authors Afifah, Risdiana Cholifatul Afrida, Eric Apriani Esma Dyah Ari Wulandari Dyah Kumala, Nevy Risna FATMAWATI, DIYAH fitria pra Irvan, Muhamad Joko Susilo Khairul, Anita Lestari, Fitria Maya Liss Dyah Dewi Arini Miftakhul Janah Nuramini, Tika Morena Nurisma Mega Putri Nurwakhid, Nurwakhid Paryanto Paryanto Putro, Wibisono Handoko Risdiana Cholifatul Afifah, Risdiana Risna, Nevy Rizal, Fachri Fatkhur S. Suripin Sinta Nabela Suharyanto Sulistriono, Endro Syafrudin Syafrudin Totok Apriyanto, Totok Undayani Cita Sari Yulianing Sukma