Learning from Incidents - Oily Water Drainage System

2018 ◽  
Author(s):  
Kuriakose Mathew Molelputhenpura ◽  
Khalid Adel ◽  
Ibrahim Al Awadhi
Keyword(s):  
Drainage System ◽  
Water Drainage ◽  
Oily Water

scholarly journals Simulation studies of storm water drainage in Wrocław

2018 ◽  
Vol 44 ◽  
pp. 00129
Author(s):  
Monika Nowakowska
Keyword(s):  
Hydrodynamic Model ◽  
Drainage System ◽  
Storm Water ◽  
Simulation Studies ◽  
Water Drainage ◽  
Residential Areas ◽  
Residential Communities ◽  
Flood Volume ◽  
Maximum Water ◽  
Water Impoundment

In the paper were made the verification of the operation of a rainwater drainage system in the residential communities of Gaj and Tarnogaj in Wrocław, carried out in the hydrodynamic model using SWMM software. There were used two criterial precipitation: Euler’s model (with a frequency of C = 3 years) and the actual precipitation (C = 5 years). The criteria of overloading the system was the specific flood volume (SFV). For both cases of precipitation load of catchment, the simulated calculations showed the occurrence of outflows from the channels. Due to the value of SFV indicator (respectively: 19 m3/ha and 42,9 m3/ha), it was found that the tested system needs modernization, therefor acceptable instantaneous water level above the maximum water impoundment were more often than 1 per 3 years, which leads to overflows from channels for residential areas more often than allowed once every 20 years.

scholarly journals A cross-validated three-dimensional model of an englacial and subglacial drainage system in a High-Arctic glacier

2020 ◽  
Vol 66 (256) ◽  
pp. 278-290
Author(s):  
Lena U. Hansen ◽  
Jan A. Piotrowski ◽  
Douglas I. Benn ◽  
Heidi Sevestre
Keyword(s):  
Three Dimensional ◽  
Drainage System ◽  
High Arctic ◽  
Water Drainage ◽  
Three Dimensional Model ◽  
Closure Mechanism ◽  
Ground Penetrating ◽  
Arctic Glacier ◽  
D Model ◽  
Englacial Drainage

AbstractRecent speleological surveys of meltwater drainage systems in cold and polythermal glaciers have documented dynamic englacial and in some cases subglacial conduits formed by the ‘cut-and-closure’ mechanism. Investigations of the spatial distribution of such conduits often require a combination of different methods. Here, we studied the englacial drainage system in the cold glacier Longyearbreen, Svalbard by combining speleological exploration of a 478 m long meltwater conduit with a high-resolution ground penetrating radar (GPR) survey with two different centre-frequencies (25 and 100 MHz). The results yielded a 3-D documentation of the present englacial drainage system. The study shows that the overall form of englacial conduits can be detected from velocity−depth converted GPR data, and that the 3-D model can facilitate a method to pinpoint the reflections in a radargram corresponding with the englacial drainage system, although fine detail cannot be resolved. Visible reflections approximately parallel to the mapped englacial water drainage system likely result from sediment incorporated in the ice or from abandoned parts of the englacial drainage system.

scholarly journals Modelled subglacial floods and tunnel valleys control the lifecycle of transitory ice streams

2018 ◽  
Author(s):  
Thomas Lelandais ◽  
Édouard Ravier ◽  
Stéphane Pochat ◽  
Olivier Bourgeois ◽  
Christopher D. Clark ◽  
...  
Keyword(s):  
Ice Sheets ◽  
Drainage System ◽  
Water Drainage ◽  
Ice Streams ◽  
Drainage Systems ◽  
Bed Erosion ◽  
Physical Experiments ◽  
Flow Speeds ◽  
Continental Ice Sheets ◽  
Mass Transfers

Abstract. Ice streams are corridors of fast-flowing ice that control mass transfers from continental ice sheets to oceans. Their flow speeds are known to accelerate and decelerate, their activity to switch on and off, and even their locations to shift entirely. Our analogue physical experiments reveal that a lifecycle incorporating evolving subglacial meltwater routing and bed erosion can govern this complex transitory behaviour. The model ice streams switch on when subglacial water pockets drain as marginal outburst floods. Then they decelerate as basal coupling increases as a consequence of the lubricating water drainage system spontaneously organising itself into channels that erode tunnel valleys. They surge or jump in location when these water drainage systems maintain low discharge but they ultimately switch off when tunnel valleys have expanded to develop efficient drainage systems. Beyond reconciling previously disconnected observations of modern and ancient ice streams into a single lifecycle, the modelling suggests that tunnel valley development may be crucial in stabilising portions of ice sheets during periods of climate change.

scholarly journals Hubungan Faktor Lingkungan dengan Kejadian Diare Balita di Wilayah Kerja Puskesmas Kambang Kecamatan Lengayang Kabupaten Pesisir Selatan Tahun 2013

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Fitra Dini ◽  
Rizanda Machmud ◽  
Roslaili Rasyid
Keyword(s):  
Waste Water ◽  
Drinking Water ◽  
Environmental Factors ◽  
Significant Relationship ◽  
Random Sampling ◽  
Drainage System ◽  
Water Drainage ◽  
Cross Sectional ◽  
Children Under Five ◽  
Under Five

AbstrakPuskesmas Kambang adalah kejadian diare terbanyak di Pesisir Selatan yang menjadi insiden tertinggi di Sumatera Barat tahun 2012 dengan kondisi sanitasi yang sehat kurang dari 60%. Hampir sepertiga kasusnnya terjadi pada balita (26,7%). Tujuan penelitian adalah untuk mengetahui hubungan faktor lingkungan dengan kejadian diare balita. Penelitian menggunakan desain analitik cross sectional dengan jumlah subjek 63 orang dengan teknik multi stage random sampling. Penelitian menggunakan kuesioner melalui wawancara dan observasi. Hasil penelitian didapatkan analisis univariat kejadian diare balita 36 (57,1%), pembuangan tinja yang tidak sehat 34 (54%), sumber air minum tidak sehat 30 (47,6%), SPAL RT yang buruk 40 (63,5%), pengelolaan sampah yang buruk 36 (57,1%). Analisis bivariat didapatkan hasil ada hubungan signifikan antara pembuangan tinja dengan kejadian diare balita (p=0,010), OR=4,5. Ada hubungan signifikan antara sumber air minum dengan kejadian diare balita (p=0,026), OR=3,7. Ada hubungan yang signifikan antara SPAL RT dengan kejadian diare balita (p=0,003), OR=6. Ada hubungan yang signifikan antara pengelolaan sampah dengan kejadian diare balita (p=0,043), OR=3,3. Kesimpulan adalah ada hubungan yang signifikan antara faktor lingkungan.Kata kunci: diare, balita, faktor lingkungan AbstractKambang Health Center has the highest incidence of diarrhea in the South Pesisir which became the highest incidence in West Sumatra in 2012 with healthy sanitary conditions of less than 60%. Nearly one-third of cases occur in children under five (26.7%). The objective of this study was to determine the relationship of environmental factors with the incidence of diarrhea in children under five.This study used a cross sectional analytic method with a total subjek were 63 people, chosen by multistage random sampling technique. This study also used a questionnaire with interviewed and observation. Univariate analysis results showed that the incidence of diarrhea children under five 36 (57.1%), unsanitary excreta disposal 34 (54%), the source of drinking water is not healthy 30 (47.6%), poor waste water drainage system 40 (63.5%), poor waste management 36 (57.1%). Bivariate analysis showed significant relationship between excreta disposal site with the incidence of diarrhea in children under five with p=0.010 and OR=4.5. There is a significant relationship between sources of drinking water with the incidence of diarrhea in children under five with p=0.026 and OR=3.7. There is a significant relationship between the waste water drainage system with the incidence of diarrhea in children under five with p=0.003 and OR=6. There is a significant relationship between waste management with the incidence of diarrhea in children under five with p=0.043 and OR=3.3.In conclusion, there were significant relationship between environmental factors.Keywords: diarrhea, children under five, environmental factors

scholarly journals Flood Mitigation Techniques—A New Perspective for the Case Study of Adayar Watershed

2017 ◽  
Author(s):  
Vidyapriya V. ◽  
Ramalingam M.
Keyword(s):  
Drainage System ◽  
Flood Mitigation ◽  
Storm Water ◽  
Mitigation Measures ◽  
Complex Nature ◽  
Adjacent Area ◽  
Drainage Network ◽  
Flood Events ◽  
Water Drainage ◽  
Impervious Area

Mostly populous city like Chennai is subjected to frequent flooding due to its complex nature of natural and man-made activities. From the analysis of the past records of flood events of 1943,1976,1985,2005 and 2008,it has been observed Adayar watershed is subjected to cataclysmic flooding in low-lying areas of the city and its suburbs because of inoperativeness of the local drainage system, rainfall associated with cyclonic activity, topography of the terrain, encroachments along the floodplain, hugh upstream flow discharge into the river and the highly impervious area which blocked the runoff to flow into the storm water drainage. After looking into these problems of flooding, a study have been conducted on Adayar watershed to develop a 2D hydrodynamic model for the two scenarios of existing condition of storm water drainage network and revised conditions of storm water drainage network using high resolution Lidar DEM to assess the volume of runoff with respect to time and duration on flood peaks for the two flood events of 2005 and 2015.Secondly to develop a 1D flood model to predict the river stages during peak floods using MIKE 11 for the Adayar watershed. Thirdly to integrate the coupled 1D and 2D model using MIKEFLOOD for assessing the extent of inundation in the floodplain area of Adayar river. Finally results from the integrated model have been validated and the results found satisfactory. As a part of mitigation measures, two flood mitigation measures have been adopted. One measure such as revised storm water drainage system which enhances the flood carrying capacity of the drains and results in less inundated area which solves the problem of urban flooding and second measure such as regrading the river bed which reduces the floodplain inundation around the adjacent area of the river. After adopting these measures, the river is free to flow into the sea without any blockades.

scholarly journals Detection of Underground Anomalies Using Analysis of Ground Penetrating Radar Attribute

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Cuong Van Anh LE ◽  
Thuan Van NGUYEN
Keyword(s):  
Ground Penetrating Radar ◽  
Urban Areas ◽  
Geophysical Methods ◽  
Synthetic Data ◽  
Drainage System ◽  
Real Data ◽  
Building Structures ◽  
Water Drainage ◽  
Diffraction Curve ◽  
Ground Penetrating

Need of specifying underground construction works for supporting further tasks as maintenance, repairing, or setting up new underground structures. For these needs, ground penetrating radar, one of the efficient geophysical methods, can bring high-resolution and quick underground image revealing existence of both natural and artificial anomalies. Its fixed receiver-transmitter antennas setting as constant offset is commonly used in urban areas. Conventionally, hyperbolae events are crucial indicator for scattering objects as kinds of pipes, water drainage system, and concrete building structures as well as sink holes. Calculation of their depths and sizes requires migration analysis with the environment velocity. Migrated sections with different velocity show different chaos degrees of transformation from a hyperbola diffraction curve to its focused area. We have researched diagrams of different Ground Penetrating Radar attributes as energy, entropy, and varimax dependent on two variables, velocity and window zone covering diffraction events from a set of synthetic data and real data, in specifying the environment velocity. We have developed a novel technique for evaluation of the ground velocity and object’s size by combination of the new varimax diagram and the Kirchhoff migration method. The technique can define contribution of diffracted ground penetrating radar waves for building the diagram after removing the reflection contribution. The synthetic datasets consist of different random background noise levels and expressions of different-sized circular and rectangular pipes. The real data is measured for detecting two underground gas pipes in Ba Ria – Vung Tau province, Vietnam.

scholarly journals Geotouristic attractions of the Ostrava part of the Upper Silesian Basin: geological and environmental sites

2017 ◽  
Vol 8 (2) ◽  
pp. 50-57
Author(s):  
Jakub Jirásek ◽  
Lenka Petrušková ◽  
Martin Sivek
Keyword(s):  
Coal Mining ◽  
Mine Water ◽  
Bituminous Coal ◽  
Underground Mining ◽  
Drainage System ◽  
Environmental Issues ◽  
Water Drainage ◽  
Geological Features ◽  
Burning Coal ◽  
Environmental Burdens

Abstract In the Ostrava part of the Upper Silesian Basin there are many geotouristic sites connected with the underground mining of Carboniferous bituminous coal. Text is focused on those related to the geology of the Basin and environmental issues connected to coal mining. Of great intrest are outcrops of Mississippian sediments of the paralic Ostrava Formation, as well as two most important museums with permanent geological exhibitions. Some interesting geological features conncted to younger periods of Quarternary glaciation are also mentioned. Two types of publicly accessible sites related to the environmental burdens (burning coal heaps, saline mine water drainage system) are also described.

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