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KAJIAN SEDIMENTASI PADA SUMBER AIR BAKU PDAM KOTA PONTIANAK Erlanda, Ella Prastika; Soeryamassoeka, Stefanus Barlian; Yuniarti, Erni
Jurnal Teknik Sipil Vol 12, No 2 (2012): Edisi desember 2012
Publisher : Fakultas Teknik Universitas Tanjungpura

Abstrak Peristiwa sedimentasi atau pengendapan partikel-partikel tanah yang terbawa aliran sungai seringkali terjadi di sungai-sungai, tidak terkecuali Sungai Kapuas di Pontianak Kalimantan Barat, khususnya pada sumber-sumber air baku PDAM Kota Pontianak. Tingkat sedimentasi yang tinggi mengakibatkan pendangkalan dan perubahan kualitas air sungai sehingga dapat mempengaruhi beberapa aktivitas masyarakat yang memanfaatkan sumber-sumber air baku tersebut, sehingga perlu diketahui besarnya tingkat sedimentasi dan debit air yang terjadi di sekitar intake PDAM Kota Pontianak. Metode yang digunakan pada saat pengambilan data primer menggunakan metode sesaat di mana hasil yang ada menggambarkan kondisi pada lokasi tertentu pengambilan sampel. Dalam menganalisis data digunakan metode grab sample (metode sesaat) dan metode L.C Van Rijn. Analisis data perhitungan menggunakan kedua metode ini menghasilkan nilai yang berbeda karena cara pandang setiap metode berbeda. Untuk metode sesaat debit sedimen dipengaruhi oleh debit aliran dan konsentrasi sedimen, sedangkan metode L.C Van Rijn debit sedimen dipengaruhi oleh diameter ukuran sedimen, kerapatan jenis, dan kecepatan. Dari hasil analisis didapat besar debit sedimen dengan metode sesaat di intake Selat Panjang saat pasang 3393,387 ton/hari, saat surut 927,208 ton/hari; di intake Imam Bonjol saat pasang 308,558 ton/hari, saat surut 158,506 ton/hari; di intake Penepat saat pasang 55,019 ton/hari, saat surut 34,388 ton/hari. Jumlah angkutan sedimen dengan metode L.C Van Rijn di intake Selat Panjang saat pasang 980,0276 ton/hari, saat surut 1,1517 ton/hari; di intake Imam Bonjol saat pasang 129,7662 ton/hari, saat surut 0,4585 ton/hari; di intake Penepat saat pasang 0,1267 ton/hari, saat surut 0,2964 ton/hari. Debit air di intake Selat Panjang saat pasang 1354,321 m3/detik, saat surut 357,989 m3/detik, di intake Imam Bonjol saat pasang 223,205 m3/detik, saat surut 114,660 m3/detik; di intake Penepat saat pasang 18,729 m3/detik, saat surut 12,876 m3/detik. Kata-kata kunci: PDAM Kota Pontianak, debit aliran, debit sedimen

PENGARUH PERUBAHAN TATA GUNA LAHAN TERHADAP BESARNYA DEBIT(Q) PADA SUATU KAWASAN (STUDI KASUS PASAR FLAMBOYAN) ; Soeryamassoeka, Stefanus Barlian; Yuniarti, Erni
Jurnal Teknik Sipil Vol 12, No 2 (2012): Edisi desember 2012
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtsft.v12i2.1529

Abstrak Akibat adanya perluasan wilayah seiring dengan pertambahan jumlah penduduk dan pesatnya pembangunan, sistem drainase seperti parit-parit maupun drainase buatan tidak terpelihara dengan baik. Akibat dari kondisi tersebut maka tidak heran apabila Kota Pontianak menjadi salah satu kota banjir di Indonesia. Padahal pada saat tahun 1970-an sampai dengan akhir tahun 1980-an bencana banjir jarang terjadi. Banyaknya pembangunan yang dilakukan dari tahun ke tahun mengakibatkan perubahan tata guna lahan yang ada. Penelitian ini merupakan suatu bentuk kajian mengenai pengaruh perubahan tata guna terhadap besarnya debit (Q) pada suatu kawasan, dengan daerah yang dijadikan sampel penelitian adalah pasar Flamboyan Pontianak. Kajian ini bertujuan untuk mengetahui pengaruh perubahan tata guna lahan terhadap besarnya debit aliran di kawasan pasar Flamboyan, Kota Pontianak dan membuat suatu konsep desain pasar Flamboyan sehingga dapat mengurangi besarnya debit yang ada sekarang. Dari kajian yang dilakukan didapatkan hasil perbedaan debit yang signifikan sebelum dan setelah pasar Flamboyan dibangun. Perubahan tata guna lahan di pasar Flamboyan dari lahan terbuka menjadi daerah yang terbangun mengakibatkan perubahan debit air secara signifikan di mana debit sebelum dibangun adalah 0,073 m3/detik, dan setelah dibangun adalah S1 Q5 = 0,152 m3/detik, S2 Q5 = 0,064 m3/detik, S3 Q5 = 0,041 m3/detik, S4 Q5 = 0,060 m3/detik. Hasil yang didapat dari desain pasar Flamboyan yang baru dapat mengurangi debit pasar Flamboyan yang sekarang dan debit setelah didesain menjadi 0,67 m3 sehingga debit aliran yang ada pada saat sekarang ini dapat berkurang dan meminimalisir terjadinya banjir. Kata-kata kunci: debit, tata guna lahan, pasar Flamboyan

ANALISIS SEDIMEN SUNGAI MENYUKE KABUPATEN LANDAK Ramadhani, Fikry Putra; Kartini, Kartini; Soeryamassoeka, Stefanus Barlian
JeLAST : Jurnal PWK, Laut, Sipil, Tambang Vol 8, No 2 (2021): JeLAST Juni 2021
Publisher : JeLAST : Jurnal PWK, Laut, Sipil, Tambang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jelast.v8i2.49625

Banjir yang terjadi di beberapaÂ kecamatan yang ada di Kabupaten Landak disebabkan meluapnya air sungai, salah satunya sungai Menyuke. Proses angkutan dan pengendapan sedimentasi menyebabkan naiknya dasar sungai, dan tingginya muka air sehingga berakibat terjadinya banjir. Penelitian ini bertujuan untuk mengetahui karakteristik sedimen dan laju sedimentasi di Hilir Sungai Menyuke dan dilakukan pada 5 segmen. Analisis sedimen dilakukan menggunakan Metode Meyer-Peter-Muller, Metode L.C Van Rijn, dan Metode Einstein. Data yang digunakan dalam penelitian ini berupa data pengukuran hidrometri sungai, dan sampel sedimen dasar. Hasil penelitian iniÂ menunjukkan bahwa karakteristik sedimen berjenis pasir dengan diameter rata-rata sebesar 0,330 mm dan berat jenis berkisar antara 2,645 ton/m3 - 2,721 ton/m3. Hasil penelitian ini didapat laju angkutan sedimen total, metode yang cocok digunakan pada penelitian ini adalah Metode L.C Van Rijn, dengan total angkutan sedimen minimum terletak pada segmen 1 sebesar 2,936 ton/hari dan maksimum terletak pada segmen 5 sebesar 6,585 ton/hari.Kata kunci: karakteristik sedimen, laju sedimentasi

GENERATION OF SYNTHETIC RAINFALL DATA IN SEKAYAM SUB-WATERSHED BASED ON TRMM SATELLITE RAINFALL DATA CORRECTION EQUATION Iwansyah Iwansyah; SB. Soeryamassoeka; Eko Yulianto
Jurnal Teknik Sipil Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i1.61097

The hydrological analysis is the first stage of the review in waterworks planning. Hydrological analysis necessitates the availability of sufficient data. Data availability tends to have several problems, including a lack of availability, incomplete/empty data, a smaller number of stations, observers, and observation systems, data entry that is still manual, and slow data collection. One possible solution is to use rain satellites. However, TRMM data must be evaluated for field suitability. TRMM (Tropical Rainfall Measurement Mission) rainfall data can help overcome this. TRMM is a NASA mission that uses weather monitoring satellite technology to monitor tropical rainfall. This is also the case for the Sekayam Subwatershed, part of the Kapuas River Basin.In the Sekayam sub-watershed, there are 14 (fourteen) rainfall observation stations managed by the Balai Wilayah Sungai Kalimantan (BWSK) I, but currently only 5 observation stations are still active, namely the SGU-01 Sanggau, SGU-03 Balai Karangan, SGU-06 Entikong, SGU-19 Semuntai and SC-01 Kembayan observation stations with data recorded up to 2019, while the other 9 (nine) observation stations do not have long continuous data, because there are years where rainfall data is not recorded. This is because the recording of rainfall on average stopped until 2005, or even some have stopped operating since the 1990s or early 2000s. This study aims to generate representative synthetic TRMM daily rainfall amount data for the Sekayam sub-watershed based on the correction equations obtained in a series of TRMM rainfall data validation analyses, so that it can be used as alternative daily rainfall data in water resources planning and management in the Sekayam sub-watershed. From the analysis, it can be seen that synthetic rainfall data in the Sekayam sub-watershed will be valid if it is generated with the linear model correction equation Y = 0.6708 X + 139.123 or can be interpreted as TRMM' = 0.6708 TRMM + 139.123.

FLOOD MANAGEMENT STRATEGY IN THE LANDAK SUB-RIVER BASIN USING SWOT ANALYSIS Aldi Alfaro; SB Soeryamassoeka; Danang Gunarto; Umar Umar; Eko Yulianto
Jurnal TEKNIK SIPIL Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23428/jtsft.v23i1.61790

The Landak sub-River Basin is part of the Kapuas River Basin which is drained by the Landak River with an area of approximately 7,921 km2. Flooding in the Landak sub-River Basin occurs every year with the number of cases tending to increase. Flooding in the Landak sub-River Basin inundates about 20 villages, which means that flood-prone areas dominate. The causes of flooding in the Landak sub-River Basin are very complex, basically caused by natural and non-natural factors. Specifically, there are many problems in the Landak sub-River Basin that are thought to trigger flooding such as land use change, decreasing catchment areas, blockages in small rivers, and so on. To identify strategic issues regarding flooding in the Landak sub-River Basin, a Focus Group Discussion (FGD) was conducted which was attended by several resource persons who were credible with the subject matter and an AHP analysis was conducted first to determine the priority scale of flood management in the Landak sub-River Basin. The result of determining the priority scale of flood management in the Landak sub-River Basin is the strengthening and implementation of regulations. The resulting strategic issues were subjected to a questionnaire that was assessed by the respondents involved during the FGD. The results obtained from this series of SWOT analyses are the formulation of strategies that are most suitable for the strategic issues of flooding in the Landak sub-River Basin using QSPM analysis, along with the determination of short-term, medium-term and long-term strategies using SFAS analysis.

ANALYSIS WATER AVAILABILITY AND WATER BALANCE IN IRRIGATION AREAS RINTAU, DISTRICT SEKAYAM Ezzy Yuanita; Kartini Kartini; S B Soeryamassoeka
Jurnal TEKNIK SIPIL Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23428/jtsft.v23i1.60891

Population growth in Indonesia is increasing every year, resulting in an increasing need for food. To support maximum agricultural yields every year, irrigation is needed as well as the availability and demand for water for irrigation. water discharge to irrigate the fields. DI Rintau has decreased along with a decrease in the function of the water catchment area due to the existence of several soil channels, which can increase the possibility of seepage or infiltration and increase water loss. The purpose of this research is to analyze the availability and balance of water in DI Rintau. The method used to calculate water availability is using the mock method. analysis of water availability in the Rintau Irrigation Area using the Mock method, obtained a maximum reliable discharge of 707,512 l/s, namely in the first half of December, the minimum reliable discharge is 114,200 l/s, namely in the first half of September and the mainstay discharge is an average of 402,619 l/sec. Water balance analysis in the Rintau Irrigation Area, water demand is not met or there is a water shortage (deficit) in the first half of August, which is 205,201 l/s.

FLOOD MANAGEMENT STRATEGY IN THE LANDAK SUB-RIVER BASIN USING SWOT ANALYSIS Aldi Alfaro; SB Soeryamassoeka; Danang Gunarto; Umar Umar; Eko Yulianto
Jurnal TEKNIK SIPIL Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23428/jtsft.v23i1.61790

The Landak sub-River Basin is part of the Kapuas River Basin which is drained by the Landak River with an area of approximately 7,921 km2. Flooding in the Landak sub-River Basin occurs every year with the number of cases tending to increase. Flooding in the Landak sub-River Basin inundates about 20 villages, which means that flood-prone areas dominate. The causes of flooding in the Landak sub-River Basin are very complex, basically caused by natural and non-natural factors. Specifically, there are many problems in the Landak sub-River Basin that are thought to trigger flooding such as land use change, decreasing catchment areas, blockages in small rivers, and so on. To identify strategic issues regarding flooding in the Landak sub-River Basin, a Focus Group Discussion (FGD) was conducted which was attended by several resource persons who were credible with the subject matter and an AHP analysis was conducted first to determine the priority scale of flood management in the Landak sub-River Basin. The result of determining the priority scale of flood management in the Landak sub-River Basin is the strengthening and implementation of regulations. The resulting strategic issues were subjected to a questionnaire that was assessed by the respondents involved during the FGD. The results obtained from this series of SWOT analyses are the formulation of strategies that are most suitable for the strategic issues of flooding in the Landak sub-River Basin using QSPM analysis, along with the determination of short-term, medium-term and long-term strategies using SFAS analysis.

DETERMINATION OF THE PRIORITY SCALE OF FLOOD MANAGEMENT IN THE LANDAK SUB-WATERSHED M. Ma'ruf Akafi; SB Soeryamassoeka; Danang Gunarto; Azwa Nirmala; Mochammad Meddy Danial
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.64168

The Landak Sub Watershed is part of Indonesia's Kapuas River Basin, covering an area of approximately 7,921 km2 and comprising three administrative regions: Landak Regency, Kubu Raya Regency, and Pontianak City. Like other regions in Indonesia, the frequency of flood events in the Landak Sub Watershed has been increasing each year, becoming a severe problem as it has caused losses for the community. Therefore, a study is needed to provide an overview of the most suitable flood management measures to minimize floods in the Landak Sub Watershed.This article presents the research results to determine the priority scale of flood mitigation measures suitable for implementation in the Landak Sub Watershed using the Analytic Hierarchy Process (AHP). The determination of criteria, sub-criteria, and flood management alternatives is based on the results of a Focus Group Discussion (FGD) held in Ngabang City on August 30, 2022. The selected flood management alternatives combine both structural and non-structural measures. Once the hierarchy is established, a questionnaire is distributed to determine the appropriate options for flood mitigation in the Landak Sub Watershed.The study results indicate that the priority scale for flood mitigation in the Landak Sub Watershed is by revising regulations and policies. The analysis shows that the priority criterion is Law and Institutions with a weight of 0.376, the priority sub-criterion is Legislation with a weight of 0.213, and the priority alternative is the revision of regulations and policies with a weight of 0.1984. For the correction of rules and procedures to be effectively carried out, all stakeholders related to flood control in the Landak Sub Watershed must be involved.

WATER LEVEL PROFILE IN PARIT BERKAT DRAINAGE CHANNEL OF PUNGGUR BESAR Alfi Riandini; Nurhayati Nurhayati; S.B. Soeryamassoeka
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.62537

Floods are common natural catastrophes in Indonesia, particularly during the rainy season. The Parit Berkat water catchment region is one of the locations that frequently experience flooding. The channel's capacity must be increased to accommodate the current water discharge, resulting in this condition. Several reasons are responsible for the diminished capacity of the canal. For instance, inhabitants' activities along canal banks might contribute to the siltation of channels. This research aimed to evaluate the influence of tides and rainfall on the flow of the Parit Berkat Canal. This research provided the use of both primary and secondary data. The leading information consists of measurements of the cross-section and length of the channel and the elevation of the tidal water level over 15 days. Secondary data consists of the maximum daily rainfall data received from Balai Wilayah Sungai Kalimantan I (BWSK I) and the location map for the research. The flow profile is simulated using HEC-RAS. The findings demonstrate that when maximum rainfall and low tides coincide, 13 stations are safe in the 2-year return period of rain, eight stations are safe in the 5-year return period, and six stations are safe in the 10-year return period.

THE USE OF TROPICAL RAINFALL MEASURING MISSION RAINFALL DATA AS INPUT DATA FOR WATER AVAILABILITY ANALYSIS WITH RAINFALL-RUNOFF MODELS IN THE MELAWI SUB-BASIN Edi Gampo; SB Soeryamassoeka; Kartini Kartini
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.64404

Many rain-to-discharge transformation models have been made, such as the Mock Model and the NRECA Model, which are used to make monthly synthetic discharge data when there is not enough discharge data to analyze water availability in a Sub-Basin or Sub-Basin. Tropical Rainfall Measuring Mission (TRMM) data, created by NASA and JAXA, is one type of satellite-based rainfall data that can help overcome the lack of rainfall data. However, not all areas have rainfall recording stations, and if there are, not all existing rainfall recording stations operate correctly. Such conditions also occur in the Melawi Sub-Basin in West Kalimantan. This research aims to determine how much water is available in the Melawi Sub-Basin by putting satellite-based rainfall data into the NRECA model and the Mock model, which converts rainfall to discharge.This study was done to determine how reliable TRMM satellite rainfall data are as input data for the rainfall-to-discharge transformation model used to determine how much water is available in the Melawi Sub-Basin. The goal of this study is to assess the suitability of TRMM data with observation station rainfall data in the Melawi Sub-Basin by validating TRMM satellite rainfall data with BMKG Susilo and BMKG Nanga Pinoh observation station rainfall data and to choose the appropriate rain-to-flow diversion model used in the Melawi Sub-Basin based on the results of model parameter calibration, with the models whose parameters are calibrated being the Mock Model and the NRECA.The study results show that TRMM rainfall data in the Melawi Sub-Basin that has been validated and corrected with the equation Y = 0.748089283 X + 62.19135368 can be used as input data in the analysis of water availability, and the transformation model of rainfall into discharge that is more suitable is the Mock Model. In general, both the observation station rainfall pattern and the TRMM rainfall pattern tend to have the same pattern as the discharge pattern in the Melawi Sub-Basin. The fact that August has the lowest peak is clear evidence of this. Even though the highest point doesn't happen in the same month, the trend is the same, so TRMM rainfall data can be considered valid and used to replace observational rainfall data in the Melawi Sub-Basin. Similar research can be done on other Sub-Basins in Kalimantan Barat Province to help develop and manage water resources since many observation stations in Kalimantan Barat Province no longer work, and there are many large Sub-Basins in that province.

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