Studi Ukuran Diameter Butir Sedimen Dasar terhadap Kecepatan Arus di Sungai Pawan Kabupaten Ketapang

Nursiani, Tuti; Putra, Yoga Satria; Muhardi, Muhardi

doi:10.26418/pf.v8i1.39868

Cited by 9 publications

(10 citation statements)

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“…Tingginya persentase fraksi pasir, umumnya dicirikan oleh kuatnya kecepatan arus (Prartono et al, 2009;Nugroho dan Basit, 2014). Dominasi fraksi pasir juga ditemukan di sepanjang Sungai Nuni hingga ke muara, Kabupaten Manokwari (Randa et al, 2021) dan Sungai Pawan, Kabupaten Ketapang (Nursiani et al, 2020).…”

Section: Hasil Dan Pembahasanunclassified

Geokimia dan Asesmen Pencemaran Logam Berat Cd, Cu dan Zn pada Sedimen Permukaan Estuari Baturusa, Bangka

et al. 2023

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The Baturusa estuary receives inputs of organic and inorganic materials from several human activities along the river. The characteristics of heavy metals such as toxicity, resistance to decomposition, and ability to accumulate in aquatic biota can indirectly have a negative impact on the health of humans who consume marine biota. The research was conducted with the aim of studying the geochemical characteristics and assessing the level of heavy metal contamination of Cd, Cu and Zn in the sediments of the Baturusa Estuary. Heavy metal fractionation was analyzed by sequential extraction. The CF value of Cu and Zn metals shows a low level of contamination, while Cd shows a moderate level of contamination. I-Geo metal Cd is in the unpolluted to moderately polluted status, while Cu and Zn are not polluted. The PLI value indicates the unpolluted category. Geochemical fractionation of heavy metals Cd, Cu and Zn Baturusa Estuary is characterized by the presence of exchangeable, carbonate, reducible, oxidizable and residual fractions. Cu and Zn mainly tend to be stored/bound to the residual fraction (mainly derived from natural sources) while Cd is more bound to the non-residual fraction (mainly derived from human/anthropogenic activities). The risk evaluation of Cd metal is very high to high risk/hazard, while Cu and Zn are not at risk/hazardous to low. These conditions indicate that Cd metal may be harmful to the environment and has a higher mobility than other metals so that it has a higher risk of being available in the body of biota. Estuari Baturusa menerima masukan bahan organik dan anorganik dari beberapa aktivitas manusia disepanjang sungai. Karakteristik logam berat seperti toksisitas, resisten terhadap dekomposisi, dan kemampuan akumulasi terhadap biota akuatik serta secara tidak langsung dapat berdampak negatif terhadap kesehatan manusia yang mengkonsumsi biota laut. Penelitian dilakukan dengan tujuan untuk mengkaji karakteristik geokimia dan menilai tingkat kontaminasi logam berat Cd, Cu, dan Zn pada sedimen Estuari Baturusa, Bangka. Fraksinasi logam berat dianalisis dengan ekstraksi bertahap. Nilai CF logam Cu dan Zn menunjukkan tingkat kontaminasi rendah (CF<1), sedangkan Cd menunjukkan tingkat kontaminasi sedang (1≤CF<3). I-Geo logam Cd berada pada status tidak tercemar hingga tercemar sedang (0<Igeo<1), sedangkan Cu dan Zn memiliki status tidak tercemar (Igeo 0). Nilai PLI menunjukkan kategori tidak tercemar (PLI<1). Fraksinasi geokimia logam berat Cd, Cu dan Zn Estuari Baturusa dicirikan dengan adanya fraksi exchangeable, karbonat, reducible, fraksi oxidizable, dan residual. Logam Cu dan Zn utamanya cenderung tersimpan/ terikat pada fraksi residual (utamanya berasal dari sumber alami) sedangkan Cd lebih terikat pada fraksi non residual atau non resisten (utamanya berasal dari aktivitas manusia/ antropogenik). Evaluasi resiko dari logam Cd yaitu resiko/ bahaya sangat tinggi hingga tinggi, sedangkan Cu dan Zn tidak beresiko/ berbahaya hingga rendah. Kondisi tersebut menunjukkan bahwa logam Cd kemungkinan berbahaya bagi lingkungan serta memiliki mobilitas lebih tinggi daripada logam lain sehingga beresiko lebih tinggi tersedia dalam tubuh biota.

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Section: Hasil Dan Pembahasanunclassified

Geokimia dan Asesmen Pencemaran Logam Berat Cd, Cu dan Zn pada Sedimen Permukaan Estuari Baturusa, Bangka

et al. 2023

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“…Kelokan sungai merupakan area yang dapat menyebabkan kecepatan arus sungai menjadi berkurang, sehingga sedimen akan mudah terendapkan. Kecepatan arus sungai di daerah penelitian berkisar antara 0.3 -0.4 m/s (Nursiani et al, 2020).…”

Section: Analisis Persentase Fraksi Sedimen Dasar Dan Sebaran Sedimen...unclassified

Sebaran Fraksi dan Jenis Sedimen Dasar (Bed-Load) di Sungai Pawan Kecamatan Delta Pawan Kabupaten Ketapang

Nursiani¹,

Putra²,

Muhardi³

2020

J. Mar. Aquat. Sci.

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Sungai Pawan merupakan sungai terpanjang di Kabupaten Ketapang yang telah mengalami pendangkalan akibat adanya pengendapan sedimen di dasar sungai. Penelitian mengenai transpor sedimen di daerah yang berpotensi mengalami pendangkalan perlu dilakukan. Tujuan penelitian ini adalah untuk mengidentifikasi sebaran serta jenis sedimen dasar yang ada di daerah tersebut dengan menggunakan metode hidrometer. Penelitian ini dilakukan pada lima lokasi, setiap lokasi dilakukan tiga titik pengukuran. Hasil penelitian menunjukkan bahwa jenis sedimen dasar berupa lempung, lempung berlanau, tanah liat berlempung, tanah liat, tanah liat berlanau, tanah liat berpasir, dan pasir bertanah liat. Sedangkan, sebaran fraksi sedimen berupa pasir (0.05 – 2 mm) sebesar 32.07 %, lanau (0.002-0.05 mm) sebesar 42.60 %, dan lempung (<0,002 mm) sebesar 24.87%.

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“…The characteristics of liquid waste in the form of density, oil and grease, specific gravity, TSS, TDS, sediment grain size, BOD, COD, and other parameters will interact with the flow in a closed channel, and deposition is easier to occur [12,13]. Research on other hydraulic channels has focused on velocity and flow discharge, where results show that velocity affects the flow pattern in pipes and open channels [13][14][15][16][17]. Channel pipe geometric research was done by Changhee et al, 2008 [16], which compared the transportation of a water-sand mixture in circular and square pipes.…”

Section: Introductionmentioning

confidence: 99%

Greywater Flow Characteristics for Closed Channel Maintenance

2023

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Knowing the characteristics of wastewater and its interaction with the channel is crucial to finding a suitable model and maintenance method to solve the closed channel problem. The purpose of this study is to find the relationship and how much it influences the characteristics of wastewater in closed channels and analyze the limit deposit velocity (LDV) of wastewater so that there is no deposition. The parameters used to analyze wastewater characteristics are density, oil and fat, specific gravity, total suspended solids, total dissolved solids, and kinematic viscosity. The parameters used to analyze the flow characteristics in closed channels are velocity, discharge, Reynolds number, friction coefficient, energy loss, and hydraulic gradient. The method used is experimental research by simulating a closed-channel model prototype. The closed channel model is made from an acrylic pipe with a length of 6 m and a pipe diameter of 0.064 m. Simulations on each wastewater sample and the discharge variations used were 0.005, 0.004, 0.003, and 0.0015 m3/s. Velocity measurements at a 0.5 pipe water level height and distances of 0, 2, 4, and 6 m. The results showed that the nature and composition of the wastewater the flow velocity. The large value of wastewater parameters shows that the flow velocity is small. The wastewater content is considered a load that must be transported to the end of the closed channel. When the discharge increases, the velocity will increase, Reynolds number will increase, and the energy loss will be large, while the friction coefficient is inversely proportional to Reynolds number. The velocities of clean water samples are 2.90 - 1.07 m/s, tofu - making is 2.83 - 1.07 m/s, household is 2.74 - 0.85 m/s, laundry is 2.84 - 1.03 m/s, and the workshop is 2.54 - 0.66 m/s. The limit deposit velocity (LDV) for household wastewater is 1.49 m/s to prevent deposition in closed channels. Doi: 10.28991/CEJ-2023-09-01-03 Full Text: PDF

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Studi Ukuran Diameter Butir Sedimen Dasar terhadap Kecepatan Arus di Sungai Pawan Kabupaten Ketapang

Cited by 9 publications

References 0 publications

Geokimia dan Asesmen Pencemaran Logam Berat Cd, Cu dan Zn pada Sedimen Permukaan Estuari Baturusa, Bangka

Geokimia dan Asesmen Pencemaran Logam Berat Cd, Cu dan Zn pada Sedimen Permukaan Estuari Baturusa, Bangka

Sebaran Fraksi dan Jenis Sedimen Dasar (Bed-Load) di Sungai Pawan Kecamatan Delta Pawan Kabupaten Ketapang

Greywater Flow Characteristics for Closed Channel Maintenance

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