scholarly journals Perencanaan Jaringan Drainase Pemukiman Pada Perumahan Istana Safira Jalan Jambu Semanding Sumbersekar Dau Kabupaten Malang

2020 ◽  
Vol 5 (2) ◽  
pp. 50
Author(s):  
Silvester Wadan Koten ◽  
Suhudi Suhudi
Keyword(s):  
Rectangular Cross Section ◽  
Rectangular Channel ◽  
Drainage System ◽  
Channel Width ◽  
Drain Water ◽  
Secondary Channel ◽  
Channel Depth ◽  
Excess Water ◽  
Primary Channel ◽  
Channel Dimension

Drainage means to drain, dispose, or drain water. In general drainage can be defined as a series of water structures that function to reduce or remove excess water from an area or land, so that the land can be used optimally. The purpose of this research is to plan the drainage system of the Istana Safira Dau housing in Malang Regency, which in general is not all planned. Analysis and data management methods used are manual calculations in accordance with the rational method for calculating discharges, and the formula for finding the water level using h SNI for channel discharge. After the calculation, the primary channel dimension is obtained with the base channel width b = 0.50 m and channel depth 0.50 m, secondary channel dimensions are channel width b = 0.40 m and channel depth is 0.40 m, tertiary channel dimensions is channel width = 0.30 m and channel depth 0.30 m with guard height for each channel is 3% of the planned channel depth. Rectangular cross section of a rectangular channel.

scholarly journals EVALUASI PERENCANAAN DRAINASE MENGGUNAKAN SIMULASI HEC RAS 4.0 ( Studi Kasus : Jalan Budiman – Tembilahan)

2021 ◽  
Vol 7 (1) ◽  
pp. 30-39
Author(s):  
Jusatria . ◽  
M. Gasali M.
Keyword(s):  
Rectangular Cross Section ◽  
Rapid Development ◽  
Drainage System ◽  
Drainage Channel ◽  
The Road ◽  
Excess Water ◽  
The People ◽  
Discharge Simulation ◽  
The City ◽  
Duration Of Development

Abstract The rapid development of the city has resulted in the development of development in each city getting more massive with a relatively fast duration of development. This has very significant impacts on the livelihoods of the people. One of the impacts is flooding that occurs due to wrong land use and improper drainage makers. Drainage as a diversion system for excess water is needed to divert water that falls into the road body and tackle inundation that occurs when it rains. This is intended to reduce the risk of accidents due to slipping of tires due to water. The planning of the road surface drainage system in the case of the Budiman Kota Tembilahan road needs important attention in order to avoid flooding or accidents. In this study, an analysis of drainage planning was carried out with a simulation using hecras 4.0 software to simulate the planned drainage conditions on Jalan Budiman, Tembilahan city. After collecting data on the length of the drainage channel on Jalan Budiman, Tembilahan city and Catchment for the residential area on Jalan Budiman, Tembilahan city, as well as rainfall data for the last 10 years, the planned discharge and drainage for the drainage of Jalan Budiman, Tembilahan city are Qrencana = 0,141 m3/dt  dan Qsaluran = 0,264 m3/dt dimana Qs > Qr with a rectangular cross section. Then the calculation simulation can be done using HEC-RAS 4.0 software. The results of the analysis of the drainage planning of Tembilahan city roads state that the planned drainage using hecras simulations based on manual calculations is able to accommodate discharge and no runoff.   Keywords: Hec ras 4.0, discharge  , simulation Abstrak Pesatnya perkembangan kota mengakibatkan perkembangan pembangunan pada tiap – tiap kota semakin masif dengan durasi perkembangan yang relatif cepat. Hal tersebut memiliki dampak – dampak yang sangat signifikan bagi hajat hidup warga. Salah satu dampaknya ialah banjir yg terjadi diakibatkan tata guna lahan yang salah dan pembuat drainase yang tidak tepat. Drainase sebagai sistem pengalih kelebihan air sangat diperlukan untuk mengalihkan air yang jatuh ke badan jalan dan menanggulangi genangan yang terjadi ketika hujan. Hal tersebut dimaksudkan untuk menggurangi resiko kecelakaan karena tergelincirnya ban akibat air. Perencanaan sistem drainase permukaan jalan dalam kasus jalan budiman kota tembilahan perlu mendapat perhatian yang penting guna terhindar dari genangan banjir atau kecelakaan. Pada penelitian ini dilakukan analisis perencanaan drainase dengan simulasi menggunakan software hecras 4.0 guna mensimulasilkan kondisi drainase yang direncanakan pada Jalan Budiman kota Tembilahan. Setelah mengumpulkan data panjang saluran drainase di jalan Budiman kota Tembilahan dan Catchment Area pemukiman di Jalan Budiman kota Tembilahan, serta data curah hujan 10 tahun terakhir diperoleh debit rencana dan debit saluran untuk drainase Jalan Budiman kota Tembilahan adalah Qrencana = 0,141 m3/dt  dan Qsaluran = 0,264 m3/dt dimana Qs > Qr dengan penampang persegi empat. Kemudian dapat dilakukan simulasi perhitungan menggunakan software HEC-RAS 4.0.Hasil dari Analisis perencanaan drainase jalan budiman kota tembilahan menyatakan drainase yang direncanakan dengan menggunakan simulasi hecras yang berdasarkan hitungan manual mampu mengakomodasi debit dan tidak terjadi limpasan.   Kata kunci: Hec Ras 4.0, Debit, simulasi

scholarly journals PEMANFAATAN SIKLUS PEMBUANGAN AIR TERHADAP SISTEM DRAINASE PERUMAHAN KOTA

2018 ◽  
Vol 2 (2) ◽  
pp. 1
Author(s):  
Azwarman Azwarman
Keyword(s):  
Cross Section ◽  
Water Conservation ◽  
Flood Control ◽  
Rectangular Cross Section ◽  
Drainage System ◽  
Water Shortages ◽  
The Earth ◽  
Excess Water ◽  
Conservation Efficiency

Flooding as one of the big problems in Jambi City can be overcome by arranging drainage and drainage system for flood control. However, excess water during floods and used in anticipation of water shortages during the dry season has not been widely studied. The basic principle of water utilization is the engineering into a system of absorption wells or also known as water conservation which aims to prevent or minimize the lost water as the flow of the surface and store it as much as possible into the earth. The study was conducted in Jambi City, taking a case study of housing by conducting engineering to the housing drainage system so that new designs are emerging. The analysis is in the form of field observation and data analysis. This residential location is located in Paalmerah Village with 78/105 building type and there are 23 units of buildings with garden facilities and security. The results show that based on the intensity of rainfall, the dimensions of absorption wells and reservoirs can be determined for Jatayu housing. The dimension of absorption well is with the diameter of circle 1m and height 1.89 m while for the storage tub dimension is rectangular cross section with size 2m x 1.5 m x 1.5 m.Keywords: rainfall, water conservation, efficiency

Channel Dimension Constraints for Miniature Low Humidity PEM Fuel Cells

2012 ◽  
Author(s):  
Denise A. McKahn ◽  
Xizhu Zhao
Keyword(s):  
Flow Field ◽  
Lithium Ion Batteries ◽  
Mass Density ◽  
Lithium Ion ◽  
Pem Fuel Cells ◽  
Ambient Conditions ◽  
Channel Depth ◽  
Low Humidity ◽  
Minimal Mass ◽  
Channel Dimension

Numerous applications exist requiring power for small loads (<5W) with minimal mass operating in extreme ambient conditions. Making progress toward reducing stack mass, we investigate the influence of flow field channel depth and endplate compression on cell performance. The best performance was found at endplate compressions of 139 psi, cathode channel depths of 0.032 in and anode channel depths of 0.032 in. The maximum power mass-density achieved with these 4.84 cm2 cells was 16.8 mW/g in a single cell stack. If deployed in a multicell stack, this same performance would translate to a power mass-density of 45.3 mW/g, nearing the performance of off-the-shelf lithium ion batteries (approximately 70 mW/g).

Seepage through Earth Dams with Chimney Drain on Pervious Foundation

2012 ◽  
Vol 452-453 ◽  
pp. 538-542 ◽  
Author(s):  
Abdelkader Djehiche ◽  
Rekia Amieur ◽  
Mustafa Gafsi
Keyword(s):  
Experimental Study ◽  
Flow Rate ◽  
Drainage System ◽  
Earth Dam ◽  
Earth Dams ◽  
Drainage Systems ◽  
The Earth ◽  
Excess Water ◽  
Effective Drainage

This paper presents an experimental study of a homogenous earth dam. The work is focused to the search of solutions of problems encountered in the earth dams after their construction. One of the major problems is the choice and design of systems of drainage. The effective drainage system to prevent harmful accumulations of excess water is one of the most important roles of dams. Efficient drainage systems can improve the safety of earth dams. The paper presented herein reports the results obtained from the experimental study. Empiric relations have been obtained which can be help in the control of the flow rate in the chimney drain of the earth dams on pervious foundation, which can increase safety earth dams

scholarly journals Five-Year Experimental Study on Effectiveness and Sustainability of a Dry Drainage System for Controlling Soil Salinity

Water ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 111 ◽  
Author(s):  
Changshu Wang ◽  
Jingwei Wu ◽  
Wenzhi Zeng ◽  
Yan Zhu ◽  
Jiesheng Huang
Keyword(s):  
Soil Salinity ◽  
Soil Column ◽  
Drainage System ◽  
Irrigation District ◽  
Soil Permeability ◽  
Ecological Value ◽  
Salinity Control ◽  
Excess Water ◽  
Salt Crust ◽  
To Receive

The dry drainage system (DDS) is an alternative technique for controlling salinization. To quantify its role in soil salinity control, a five-year field observation from 2007 to 2011 was completed in a 2900 ha experimental plot in Yonglian Experimental Station, Hetao Irrigation District, China. Results showed that the groundwater table depth in the fallow areas quickly responded to the lateral recharge from the surrounding croplands during irrigation events. The groundwater electrical conductivity (GEC) of fallow areas increased from 5 mS·cm−1 to 15 mS·cm−1, whereas the GEC below croplands produced small fluctuations. The analysis of water and salt balance showed that the excess water that moved to fallow was roughly four times that moved by an artificial drainage system and with 7.7 times the corresponding salt. The fallow areas act as a drainage repository to receive excess water and salt from surrounding irrigated croplands. Slight salt accumulation occurred in irrigated croplands and salts accumulated, with an accelerating trend over the final two years. The evaporation capability weakened, partly due to the salt crust in the topsoil, and the decrease in soil permeability in the soil column, which was almost impermeable to water. Using halophytes may be an effective method to remove salts that have accumulated in fallow areas, having great economic and ecological value. A DDS may be effective and sustainable in situations where the fallow areas can sustain an upward capillary flux from planted halophytes.

scholarly journals A bükkaljai vízfolyások kanyarulatfejlettségének vizsgálata szerkezetföldtani okok és következtetések

2020 ◽  
Vol 144 (2) ◽  
pp. 133-152
Keyword(s):  
Climate Change ◽  
Morphological Change ◽  
Laboratory Experiments ◽  
Channel Width ◽  
Channel Formation ◽  
Fault Activity ◽  
Channel Depth ◽  
River Terraces ◽  
Form Alone ◽  
Width Change

Rivers react relatively quickly to epirogenetic movements. This is also confirmed through laboratory experiments (Ouchi, S. 1985; Marple, R. T. – Talwani, P. 1993; Twidale, P. 1996, 2004). Many river-related surface-forming processes and forms are used for studying fault activity, for example: channel formation, channel braided, variation of channel width, change of channel depth and river terraces (etc.). However, these processes and forms can be caused by climate change, so the form alone does not prove the structural activity of the area (Schumm , S. A. 1986, 2005; Pinter, N. C. 1996; Petrovszki J. 2013). Such morphological change is the development of river sinuosity, which is often used to justify the activity of faults. Several Hungarian and foreign researchers have been investigating this phenomenon, but have mainly examinied larger rivers. The purpose of this work is to examine the sinuosity of the Bükkalja creeks. I tested and refined the procedure associated with scaling in order to explain the possible causes of changes in the sinuosity of the creeks.

scholarly journals Vibroextrusion flow of concrete mixtures in a right four-corner pyramidal channel

2021 ◽  
pp. 9-15
Author(s):  
Igor Andreiev ◽  
Andrey Pinchuk ◽  
Oleksandra Kramar
Keyword(s):  
Cross Section ◽  
Newtonian Fluid ◽  
Flow Rate ◽  
Rectangular Cross Section ◽  
Rectangular Channel ◽  
Maximum Flow ◽  
Fiber Reinforced Concrete ◽  
Concrete Mixture ◽  
Parallel Plates ◽  
Concrete Mixtures

The purpose of the research was to obtain calculation formulas for describing the flow of concrete mixtures and determining their viscosity directly in the process of vibroextrusion in regular quadrangular pyramidal channels. In solving the flow problems, it was taken into account that concrete mixtures are non-Newtonian systems in the conditions of a vibration field, and hydrodynamic theories were used to calculate the processes and rheological characteristics. Since the calculation formulas for describing the flow of fluids in a regular quadrangular pyramidal channel are absent and the channel has a square cross section, an analytical dependence was used to characterize the process, which describes the flow of a Newtonian fluid in a rectangular channel of constant cross section. The authors proposed for use simplified formulas for determining the maximum flow rate and flow rate of a Newtonian fluid in a channel of rectangular cross-section. The degree of decrease in the flow velocity and the flow rates of a Newtonian fluid in a channel of rectangular cross-section in comparison with the flow between flat parallel plates are analyzed. To describe the flow of concrete mixtures in regular quadrangular pyramidal channels, the proposed coefficients for reducing the speed and flow rate, as well as the existing formulas for the flow between flat symmetric stationary walls, which converge, were used. The possibility of using the obtained formula for the flow rate in a regular quadrangular pyramidal channel for calculating the viscosity of a concrete mixture during vibration extrusion is shown. To simplify the experimental procedure, a new formula for calculating the viscosity based on the expiration time for a certain amount of concrete mixture has been proposed. The formulas obtained are convenient for further mathematical processing and have no restrictions in their application. The proposed method for determining the viscosity expands the possibilities of studying the rheological properties of concrete mixtures in the vibroextrusion of fiber-reinforced concrete mixtures.

scholarly journals Tributary Channel Width Effect on the Flow Behavior in Trapezoidal and Rectangular Channel Confluences

Processes ◽  
2020 ◽  
Vol 8 (11) ◽  
pp. 1344
Author(s):  
Aliasghar Azma ◽  
Yongxiang Zhang
Keyword(s):  
Recirculation Zone ◽  
Flow Behavior ◽  
Rectangular Channel ◽  
Maximum Velocity ◽  
Main Channel ◽  
Channel Width ◽  
Width Ratio ◽  
Geometrical Shape ◽  
Eddy Simulation ◽  
Flow Parameters

Channel confluences happen commonly in water transport networks and natural rivers. Utilizing a 3D CFD code, a series of numerical simulations were performed using a large eddy simulation turbulence model to investigate the effect of the variations in tributary channel width and the transverse geometrical shape of the main channel on the flow parameters and vertical structure in a T-shape confluence. The code was calibrated using the experimental data from the literature. Flow parameters were considered in ratios of tributary width to the main channel width in trapezoidal and rectangular channels. Results indicate that decreasing the width ratio of the tributary channel to the main channel significantly affects the flow structure in the confluence. Generally, it increases the width and length of the main recirculation zone. It also increases the maximum velocity near the bed, especially in cases with a trapezoidal shape. Besides, it highly affects the structure and formation of the recirculation zone in trapezoidal channels.

scholarly journals Towards an Optimal Pressure Tap Design for Fluid-Flow Characterisation at Microscales

Materials ◽  
2019 ◽  
Vol 12 (7) ◽  
pp. 1086 ◽  
Author(s):  
Tomás Rodrigues ◽  
Francisco Galindo-Rosales ◽  
Laura Campo-Deaño
Keyword(s):  
Pressure Drop ◽  
Soft Lithography ◽  
Rectangular Channel ◽  
Fluid Pressure ◽  
Pressure Sensors ◽  
Optimal Solution ◽  
Channel Length ◽  
Creeping Flow ◽  
Channel Width ◽  
Test Fluid

Measuring fluid pressure in microchannels is difficult and constitutes a challenge to even the most experienced of experimentalists. Currently, to the best of the authors’ knowledge, no optimal solution are being used for the design of pressure taps, nor guidelines concerning their shape and its relation with the accuracy of the readings. In an attempt to address this issue, a parametric study was devised to evaluate the performance of different pressure tap designs, 18 in total. These were obtained by combining three shape parameters: sub-channel width (w) and sub-channel–tap radius (R) or angle (α), while having the sub-channel length kept constant. For each configuration, pressure drop measurements were carried out along several lengths of a straight microfluidic rectangular channel and later compared to an analytical solution. The microchannels were fabricated out of PDMS using standard soft-lithography techniques, pressure drop was measured with differential pressure sensors, the test fluid was DI water and the flow conditions varied from creeping flow up to R e c ∼100. Pressure taps, having smooth contours (characterised by the radius R) and a sub-channel width (w) of 108 μ m , performed the best with results from that of radius R = 50 μ m only falling short of the theory by a mere ∼ 5 % .

Dimple Enhanced Heat Transfer in High Aspect Ratio Channels

2001 ◽  
Author(s):  
Srinath V. Ekkad ◽  
Hasan Nasir
Keyword(s):  
Heat Transfer ◽  
Pressure Drop ◽  
Heat Transfer Enhancement ◽  
Rectangular Cross Section ◽  
Rectangular Channel ◽  
Transfer Enhancement ◽  
Transfer Coefficients ◽  
High Heat Transfer ◽  
Smooth Channel ◽  
Wide Range

Abstract Detailed heat transfer measurements are presented for a rectangular channel with dimples on one wall. Dimpled surfaces provide high heat transfer enhancement comparable to ribbed surfaces with reduced overall pressure drop. The heat transfer coefficients were measured using a transient liquid crystal technique. The effect of channel flow Reynolds number was investigated for a wide range from 10000 to 65000. The channel is a 25.4 mm × 101.6 mm (1” × 4”) rectangular cross-section with the dimples on one of the 101.6 mm wall. Heat transfer enhancement around three times that of a smooth channel were achieved for all flow conditions. The overall pressure drop through the dimpled section of the passage was also measured. The resulting thermal performance of the dimples surfaces is significantly higher compared to channels with protruding ribs.

Sign in / Sign up

Export Citation Format

Share Document