scholarly journals Dimensioning of Required Volumes of Interconnected Detention Tanks Taking into Account the Direction and Speed of Rain Movement

Water ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1826 ◽  
Author(s):  
Mariusz Starzec ◽  
Józef Dziopak ◽  
Daniel Słyś ◽  
Kamil Pochwat ◽  
Sabina Kordana
Keyword(s):  
Catchment Area ◽  
Drainage System ◽  
Test Results ◽  
Key Factors ◽  
Urban Catchment ◽  
Storm Water Management Model ◽  
Detention Tank ◽  
Storage Reservoirs ◽  
Terminal Section ◽  
The Impact

This article is aimed at defining the impact of the direction and velocity of waves of rainfall as they pass over interconnected stormwater detention tank systems. The simulations were conducted for a real urban catchment area as part of the Storm Water Management Model (SWMM) 5.1 programme. The results permit us to conclude that the direction and velocity of a moving wave of rainfall have a significant influence on the required volumes of interconnected stormwater detention tank systems. By comparing the modelling test results for stationary rainfall and rainfall moving over the urban catchment area, it has been demonstrated that differences in the required volume of the detention tank located at the terminal section of a stormwater drainage system are inversely proportional to the adopted value of the diameter of the outfall channel for upstream storage reservoirs. In extreme cases, the differences may be up to several dozen percentage points. Furthermore, it has been proven that the arrangement of the stormwater detention tanks in relation to one another and the adopted diameter of the outfall channel are key factors in identifying the degree to which the detention tanks are hydraulically dependent on one another.

scholarly journals Compensatory alternatives for flooding control in urban areas with tidal influence in Recife - PE

RBRH ◽  
2017 ◽  
Vol 22 (0) ◽  
Author(s):  
Marcos Antonio Barbosa da Silva Junior ◽  
◽  
Simone Rosa da Silva ◽  
Jaime Joaquim da Silva Pereira Cabral ◽  
Keyword(s):  
Urban Areas ◽  
Drainage System ◽  
Infiltration Rate ◽  
Urban Drainage ◽  
Drainage Network ◽  
Storm Water Management Model ◽  
Recurrence Period ◽  
Detention Tank ◽  
Swmm Model ◽  
Two Alternatives

ABSTRACT This paper presents a study of compensatory alternatives in urban drainage, using SWMM model (Storm Water Management Model), for the critical point of flooding in an urban area and vulnerable to tide fluctuations, located in Recife. For this, we used the registered information of the micro-drainage network and defined the parameters and variables required for modeling, such as: the subareas of contribution to the drainage system, indicating the percentage of soil waterproofing, equivalent width, slope, and infiltration rate; project rain; and tide curve. Two alternatives were simulated after the model has been calibrated. The first, which is an adaptation of the drainage network, presented maximum reductions in the volume of flooding of 37% for the events with recurrence period of two years and of 58% for five years of recurrence. The second, based on the deployment of a detention tank in the existing network, presented satisfactory results for the event of two years and reduced approximately 38% for events of five years. The results showed that there was a reduction in the area of flooding for the conditions simulated. However, the first alternative would not solve the local flooding problems, it would only attenuate and would increase the overload of the drainage pipes downstream of the modified system, while the second alternative could solve the problem of flooding, with the occurrence of an event of two years.

scholarly journals Modelling and optimization of land use/land cover change in a developing urban catchment

2017 ◽  
Vol 75 (11) ◽  
pp. 2527-2537 ◽  
Author(s):  
Ping Xu ◽  
Fei Gao ◽  
Junchao He ◽  
Xinxin Ren ◽  
Weijin Xi
Keyword(s):  
Land Use ◽  
Low Impact Development ◽  
Oxygen Demand ◽  
Annual Rainfall ◽  
Optimal Planning ◽  
Urban Catchment ◽  
Storm Water Management Model ◽  
Urban Stormwater Runoff ◽  
Rainfall Runoff Model ◽  
The Impact

The impacts of land use/cover change (LUCC) on hydrological processes and water resources are mainly reflected in changes in runoff and pollutant variations. Low impact development (LID) technology is utilized as an effective strategy to control urban stormwater runoff and pollution in the urban catchment. In this study, the impact of LUCC on runoff and pollutants in an urbanizing catchment of Guang-Ming New District in Shenzhen, China, were quantified using a dynamic rainfall-runoff model with the EPA Storm Water Management Model (SWMM). Based on the simulations and observations, the main objectives of this study were: (1) to evaluate the catchment runoff and pollutant variations with LUCC, (2) to select and optimize the appropriate layout of LID in a planning scenario for reducing the growth of runoff and pollutants under LUCC, (3) to assess the optimal planning schemes for land use/cover. The results showed that compared to 2013, the runoff volume, peak flow and pollution load of suspended solids (SS), and chemical oxygen demand increased by 35.1%, 33.6% and 248.5%, and 54.5% respectively in a traditional planning scenario. The assessment result of optimal planning of land use showed that annual rainfall control of land use for an optimal planning scenario with LID technology was 65%, and SS pollutant load reduction efficiency 65.6%.

scholarly journals Oddziaływanie przepustu na warunki hydrauliczne przepływu wody w głównym rowie systemu odwadniającego stopnia wodnego Łączany

2017 ◽  
Vol 26 (1) ◽  
pp. 28-37
Author(s):  
Agata Majerczyk ◽  
Bogusław Michalec
Keyword(s):  
Water Flow ◽  
Cross Section ◽  
Catchment Area ◽  
Drainage System ◽  
Flow Conditions ◽  
Vistula River ◽  
Hydraulic Conditions ◽  
The Impact ◽  
Heavy Rains

The aim of the study is to analyze the impact of the culvert on the hydraulic conditions of water flow in the “R” ditch. The culvert was located on the main ditch in drainage system of Łączany barrage on the Vistula river. The research on ditch’s capacity in analyzed cross-section showed that the capacity decreased. The changes of cross-section caused by construction of the culvert substantially affect the flow conditions of water in the channel. The calculations showed that the existing dimension of culvert is not enough to pass the reliable discharge. The reliable flow was set for catchment area of 3.32 km2, not 0.67 km2, which is bigger than catchment area estimated in drainage project. It includes watercourses leading water to ditch with surrounds Kasztelan Pond, and then to “R” ditch. Discharges larger than 2.27 m3·s–1, particularly reliable flow, reach banks of the ditch “R” and flows out the channel. Discharges larger than the reliable discharge do not fit into the analyzed cross-section causing pouring out the water from the channel. On the basis of information taken from the locals and serving the system it is known that such a phenomenon occurs during the periods of heavy rains and floods.

scholarly journals Perencanaan Prasarana Dan Sarana Sistem Pengendalian Banjir Kota Administrasi Jakarta Pusat

2020 ◽  
Vol 1 (1) ◽  
pp. 36-44
Author(s):  
Vitta Pratiwi ◽  
Tri Rahajoeningroem
Keyword(s):  
Catchment Area ◽  
Flood Control ◽  
Positive Impact ◽  
Drainage System ◽  
Axial Flow ◽  
Flow Coefficient ◽  
Infrastructure Development ◽  
Economic Activities ◽  
The Government ◽  
The Impact

ABSTRACT The effort to countermeasure flood and puddle in DKI Jakarta is one of the priority programs implemented by the Government in order to create Jakarta as the capital of the Republic of Indonesia that is comfortable to carry out social, cultural and economic activities, thus giving a positive impact to the economy of DKI Jakarta and Indonesia. In the effort to handle the puddle and flood problems above the need of infrastructure planning and flood control means especially in central Jakarta, so as to reduce the points of the puddle and flooding and the impact caused. With this activity is expected to produce a design of infrastructure development and a means of quality flood control that means that the development can be felt by all components of the community. This activity is conducted in two areas namely Petamburan (Jati Pinggir) and Kalibaru Timur. This methodology of implementation of activities consist of preparation and preliminary stages, field survey and data analysis as well as the formulation of channel design concept as well as simulated of drainage system and flood control modeling. The analysis of precipitation frequencies of the plan uses a 5-year anniversary with the Gumbell type 1 method. The problems in the Petamburan region are the basic elevation of the irregular channels, the number of basins in the middle of the channel, the capacity of channels that have been unable to receive debit plans and elevation of the land is generally lower than the elevation of the disposal channel Broad catchment area of 21.50 Ha, assuming the flow coefficient of 0.85 and the rainfall intensity is used at 5 years of 225.7 mm, resulting in flood discharge calculation of Q = 5.73 m3/second and plus existing pump 0.75 m3/sec. Handling of normalization with base tilt to 0.0028. Redimensioning is changed to uniform i.e. B = 1.20 m; H = 1.20 m. As for East Kalibaru region the thing that concern is the narrowing of the channel in the downstream. The Tc value is 121.26 minutes, I of 38.67 mm/h and Q = 8.47 m3/sec. Specification of the pump used is a submersible type axial flow with a capacity of 2 m3/sec. Key words: Flood, rainfall, discharge, intensity, pump   ABSTRAK Upaya penanggulangan banjir dan genangan di wilayah DKI Jakarta merupakan salah satu program prioritas yang dilaksanakan pemerintah dalam rangka menciptakan Jakarta sebagai ibukota Negara Republik Indonesia yang nyaman untuk melaksanakan kegiatan sosial, budaya maupun ekonomi, sehingga memberi dampak yang positif bagi perekonomian Provinsi DKI Jakarta maupun Indonesia. Dalam upaya penanganan permasalahan genangan dan banjir di atas dibutuhkan perencanaan prasarana dan sarana pengendali banjir khususnya di Jakarta Pusat, sehingga dapat mengurangi titik-titik genangan dan banjir serta dampak yang ditimbulkan. Dengan adanya kegiatan ini diharapkan dapat menghasilkan suatu desain pembangunan prasarana dan sarana pengendali banjir yang berkualitas yaitu yang bermakna bahwa pembangunan tersebut dapat dirasakan oleh seluruh komponen masyarakat. Pada kegiatan ini dilakukan di dua wilayah yaitu Petamburan (Jati Pinggir) dan Kalibaru Timur. Metodologi pelaksanaan kegiatan ini terdiri atas tahap persiapan dan pendahuluan, survey lapangan dan analisis data serta penyusunan konsep desain saluran serta simulasi pemodelan sistem drainase dan pengendalian banjir. Analisis frekuensi curah hujan rencana menggunakan kala ulang 5 tahun dengan metode Gumbell tipe 1. Permasalahan di wilayah Petamburan adalah elevasi dasar saluran tidak beraturan, banyaknya cekungan di tengah saluran, kapasitas saluran yang sudah tidak mampu menerima debit rencana dan elevasi lahan umumnya lebih rendah daripada elevasi saluran pembuang. Luas catchment area seluas 21.50 Ha, dengan asumsi koefisien pengaliran sebesar 0.85 dan intensitas curah hujan digunakan kala ulang 5 tahun sebesar 225.7 mm, sehingga didapat perhitungan debit banjir sebesar Q = 5.73 m3/detik dan ditambah pompa eksisting 0.75 m3/detik. Dilakukan penanganan normalisasi dengan kemiringan dasar menjadi 0.0028. Redimensi diubah menjadi seragam yaitu B = 1.20 m; H = 1.20 m. Sedangkan untuk wilayah Kalibaru Timur hal yang menjadi perhatian adalah penyempitan saluran di hilir. Nilai Tc adalah 121.26 menit, I sebesar 38.67 mm/jam dan Q = 8.47 m3/detik. Spesifikasi pompa yang dipergunakan merupakan tipe submersible axial flow dengan kapasitas 2 m3/detik. Kata kunci: Banjir, curah hujan, debit, intensitas, pompa

Secular stagnation in the modern world

2018 ◽  
pp. 125-141 ◽  
Author(s):  
S. M. Drobyshevsky ◽  
P. V. Trunin ◽  
A. V. Bozhechkova
Keyword(s):  
Public Debt ◽  
Capital Accumulation ◽  
Technological Development ◽  
Japanese Economy ◽  
Modern World ◽  
Key Factors ◽  
Destruction Process ◽  
Secular Stagnation ◽  
The Impact

The paper studies the factors of secular stagnation. Key factors of long-term slowdown in economic growth include the slowdown of technological development, aging population, human capital accumulation limits, high public debt, creative destruction process violation etc. The authors analyze key theoretical aspects of long-term stagnation and study the impact of these factors on Japanies economy. The authors conclude that most of the factors have significant influence on the Japanese economy for recent decades, but they cannot explain all dynamics. For Russia, on the contrary, we do not see any grounds for considering the decline in the economy since 2013 as an episode of secular stagnation.

Present Condition Analysis and Design of Sewer Collector Recovery

2020 ◽  
Vol 15 (3) ◽  
pp. 184-195
Author(s):  
Réka Csicsaiová ◽  
Ivana Marko ◽  
Jaroslav Hrudka ◽  
Ivona Škultétyová ◽  
Štefan Stanko
Keyword(s):  
Catchment Area ◽  
Present Condition ◽  
Urban Catchment ◽  
Analysis And Design ◽  
Current State ◽  
Sewer Network

The aim of the study is to assess the hydraulic capacity of the sewer network and sewer collector recovery in the urban catchment area of Trnava.The analysis focuses on the evaluation of situations with different precipitation frequencies. Elaboration consists of modeling the current state of the assessed sewer collector B and subsequent loading of this collector by several block rainfalls. Based on the results of the analysis, the recovery of the sewer network proposed.

Model estimates of the results of diabetes patients using modern glucometers with tri-color technology for displaying test results

2019 ◽  
pp. 81-89
Author(s):  
Larisa Dmitrievna Popovich ◽  
Svetlana Valentinovna Svetlichnaya ◽  
Aleksandr Alekseevich Moiseev
Keyword(s):  
Diabetes Mellitus ◽  
Type 2 Diabetes ◽  
Type 1 Diabetes ◽  
Economic Benefits ◽  
Test Results ◽  
Self Monitoring ◽  
Patients With Diabetes ◽  
The Impact

Diabetes – a disease in which the effect of the treatment substantially depends on the patient. Known a study showed that the use of glucometers with the technology of three-color display of test results facilitates self-monitoring of blood sugar and leads to a decrease in glycated hemoglobin (HbAlc). Purpose of the study: to modeling the impact of using of a glucometer with a color-coded display on the clinical outcomes of diabetes mellitus and calculating, the potential economic benefits of reducing the hospitalization rate of patients with diabetes. Material and methods. Based on data from two studies (O. Schnell et al. and M. Baxter et al.) simulation of the reduction in the number of complications with the use of a glucometer with a color indication. In a study by O. Schnell et al. a decrease of HbA1c by 0.69 percent is shown when using the considered type of glucometers, which was the basis of the model. Results. In the model, the use of a glucometer with a color-coded display for type 1 diabetes led to a decrease in the total number of complications by 9.2 thousand over 5 years per a cohort of 40 thousand patients with different initial levels of HbA1c. In a cohort of 40 thousand patients with type 2 diabetes, the simulated number of prevented complications was 1.7 thousand over 5 years. When extrapolating these data to all patients with diabetes included in the federal register of diabetes mellitus (FRD), the number of prevented complications was 55.4 thousand cases for type 1 diabetes and 67.1 thousand cases for type 2 diabetes. The possible economic effect from the use of the device by all patients with a diagnosis of diabetes, which are included in the FRD, estimated at 1.5 billion rubles for a cohort of patients with type 1 diabetes and 5.3 billion rubles for patients with type 2 diabetes. Conclusion. Improving the effectiveness of self-monitoring, which is the result of the use of glucometers with color indicators, can potentially significantly reduce the incidence of complications in diabetes and thereby provide significant economic benefits to society.

First flush effects in an urban catchment area in Aalborg

1998 ◽  
Vol 37 (1) ◽  
pp. 251-257 ◽  
Author(s):  
Torben Larsen ◽  
Kirsten Broch ◽  
Margit Riis Andersen
Keyword(s):  
Water Quality ◽  
Catchment Area ◽  
Quality Parameters ◽  
Average Concentration ◽  
First Flush ◽  
Storm Events ◽  
Urban Catchment ◽  
Discharge Measurements ◽  
Quality Measurements

The paper describes the results of measurements from a 2 year period on a 95 hectare urban catchment in Aalborg, Denmark. The results of the rain/discharge measurements include 160 storm events corresponding to an accumulated rain depth of totally 753 mm. The water quality measurements include 15 events with time series of concentration of SS, COD, BOD, total nitrogen and total phosphorus. The quality parameters showed significant first flush effects. The paper discusses whether either the event average concentration or the accumulated event mass is the most appropriate way to characterize the quality of the outflow.

Implication of Medical Treatment for Surgical Strategies in IBD

2019 ◽  
Vol 20 (13) ◽  
pp. 1363-1368
Author(s):  
Krisztina B. Gecse ◽  
Christianne J. Buskens
Keyword(s):  
Nutritional Status ◽  
Medical Treatment ◽  
Significant Proportion ◽  
Timing Of Surgery ◽  
Multidisciplinary Management ◽  
Key Factors ◽  
Surgical Strategies ◽  
Immunosuppressive Medications ◽  
Medical Paradigm ◽  
The Impact

Despite changing medical paradigm, still a significant proportion of patients with IBD require surgery. The patient's general condition, including nutritional status and the use of immunosuppressive medications is of great importance with regard to surgical complications, as well as the choice of optimal surgical strategy. The indication and the timing of surgery are key factors for the multidisciplinary management of IBD patients. The purpose of this review is to provide an overview on the impact of medical treatment on surgical strategies in IBD.

Examining Organizational, Cultural, and Individual-Level Factors Related to Workplace Safety and Health Awareness and Risks: A Systematic Review and Metric Analysis (Preprint)

2018 ◽  
Author(s):  
Edmund W. J. Lee ◽  
Han Zheng ◽  
Htet Htet Aung ◽  
Megha Rani Aroor ◽  
Chen Li ◽  
...  
Keyword(s):  
Systematic Review ◽  
Citation Count ◽  
Workplace Safety ◽  
Key Factors ◽  
Health Awareness ◽  
Individual Level ◽  
Metric Analysis ◽  
Safety And Health ◽  
The Impact ◽  
The Relationship

BACKGROUND Promoting safety and health awareness and mitigating risks are of paramount importance to companies in high-risk industries. Yet, there are very few studies that have synthesized findings from existing online workplace safety and health literature to identify what are the key factors that are related to (a) safety awareness, (b) safety risks, (c) health awareness, and (d) health risks. OBJECTIVE As one of the first systematic reviews in the area of workplace health and safety, this study aims to identify the factors related to safety and health awareness as well as risks, and systematically map these factors within three levels: organizational, cultural, and individual level. Also, this review aims to assess the impact of these workplace safety and health publications in both academic (e.g., academic databases, Mendeley, and PlumX) and non-academic settings (e.g., social media platform). METHODS The systematic review was conducted in line with procedures recommended by Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA). First, Proquest, ScienceDirect and Scopus were identified as suitable databases for the systematic review. Second, after inputting search queries related to safety and health awareness and risks, the articles were evaluated based on a set of inclusion and exclusion criteria. Third, the factors identified in the included articles were coded systematically. Fourth, the research team assessed the impact of the articles through a combination of traditional and new metric analysis methods: citation count, Altmetric Attention Score, Mendeley readers count, usage count, and capture count. RESULTS Out of a total of 4,831 articles retrieved from the three databases, 51 articles were included in the final sample and were systematically coded. The results revealed six categories of organizational (management commitment, management support, organizational safety communication, safety management systems, physical work environment, and organizational environment), two cultural (interpersonal support and organizational culture), and four individual (perception, motivation, attitude and behavior) level factors that relate to safety and health awareness and risk. In terms of impact, the relationship between citation count and the various metrics measuring academic activity (e.g., Mendeley readers, usage count, and capture count) were mostly significant while the relationship between citation count and Altmetric Attention Score was non-significant. CONCLUSIONS This study provides a macro view of the current state of workplace safety and health research and gives scholars an indication on some of the key factors of safety and health awareness and risks. Researchers should also be cognizant that while their work may receive attention from the scholarly community, it is important to tailor their communication messages for the respective industries they are studying to maximize the receptivity and impact of their findings. CLINICALTRIAL N.A.

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