The Key Technologies of Comprehensive Utilization for Urban Rain Flood Based on the Multi-Function Tunnel

2013 ◽  
Vol 726-731 ◽  
pp. 3056-3059 ◽  
Author(s):  
Jun Yan ◽  
Hong Lu Bai ◽  
Wei Gao ◽  
Fang Kai Ma
Keyword(s):  
Urban Area ◽  
Drainage System ◽  
Flood Disaster ◽  
Rapid Urbanization ◽  
Key Technology ◽  
Comprehensive Utilization ◽  
Foreign Countries ◽  
Key Technologies

Pipe drainage system is used mostly on urban area, but under the pressure of the rapid urbanization, the disadvantages of traditional pipe drainage system are more and more serious. Analyzed the urban rain flood utilization situation in China and foreign countries, and main problems of traditional pipe drainage system in China, the key technology of comprehensive utilization for urban rain flood is put forward, which contains the multi-function tunnel building based on the concave green fields constructing, permeable bricks laying, reservoir constructing for rain flood collecting. This method can effectively prevent the drought or flood disaster due to inadequate or extensive rain volume and can make full use of rain flood resources too.

scholarly journals Community diagnosis for a slum population under the field practice area of a government medical college, New Delhi: community-oriented primary care exercise for undergraduate students

2018 ◽  
Vol 5 (12) ◽  
pp. 5404
Author(s):  
P. Aravind Gandhi ◽  
U. Venkatesh ◽  
Poornima Tiwari ◽  
Preety Doley
Keyword(s):  
Primary Care ◽  
Medical Students ◽  
Urban Poor ◽  
Unmet Need ◽  
Drainage System ◽  
Income Poverty ◽  
New Delhi ◽  
Undergraduate Medical Students ◽  
Rapid Urbanization ◽  
Awareness Campaigns

Background: Rapid urbanization has led to the increase in a group of people called ‘Urban poor’ dwelling as a community in ‘Slums’, worldwide. Slums manifest deprivation that transcends income poverty. Hence, we conducted this Community-oriented primary care (COPC) exercise, to give medical students a greater understanding of the situation of individual patients in the slum and to formulate a community diagnosis.Methods: The current study was done at Tyagaraj Nagar Jhuggi in the South district of New Delhi, during Community-oriented primary care (COPC) exercise of undergraduate medical students in their 4th semester over a period of 20 days, using a predesigned proforma for collecting data on health events and determinants of health, from families. 35 households were chosen by systematic random sampling.Results: Out of 179 community members studied, 33 (18.43%) were afflicted with morbidity, which consists of common cold with cough, generalized body pain and joint pain. The sex ratio was found to be 826, literacy rate was 76.9% in the study area, 44.11% of the households were having sanitary latrines owned by them, 68.6% had a closed drainage system 63% of the families used clean fuel for cooking and unmet need of contraception was 85% among eligible couples.Conclusions: Investments in women’s access to various contraceptive preferences are urgently needed to help increase the contraceptive prevalence rate. Health Education and awareness campaigns on prevention of potential mosquito, fly breeding sites, hand hygiene, avoidance of firewood as fuel, establishing smoke outlet and solid waste management should be arranged.

scholarly journals Evaluating the performance of low impact development practices in urban runoff mitigation through distributed and combined implementation

2020 ◽  
Vol 22 (6) ◽  
pp. 1506-1520
Author(s):  
Sina Samouei ◽  
Mehmet Özger
Keyword(s):  
Low Impact Development ◽  
Drainage System ◽  
Infiltration Rate ◽  
Hydrologic Response ◽  
Impervious Surfaces ◽  
Storm Events ◽  
Rapid Urbanization ◽  
Urban Flood ◽  
Small Catchment ◽  
Runoff Reduction

Abstract Rapid urbanization and increasing impervious surfaces in cities lead to a serious reduction in infiltration rate of the surface and cause challenges in stormwater management. The Low Impact Development (LID) concept is considered as a potential solution for sustainable urban growth by contributing in urban flood mitigation. However, its effects on hydrologic response of the urbanized catchments, especially in broad scale implementation, are not fully understood and practically examined. In this study a hydrologic-hydraulic model of a small catchment was developed in EPA storm water management model (SWMM) program and calibrated and validated through field measurements. The hydrologic response of the catchment was investigated after replacing proportions of impervious surfaces with combinations of LID practices such as green roof, permeable pavement and bio-retention cell, through four land cover conversion scenarios and under five different designed storm events. The simulation results which are derived by comparison of outflow hydrographs between each scenario and conventional drainage system indicated that implementing 5–20% of LIDs has a noticeable impact on runoff peak flow and volume reduction, especially in storm events with shorter return periods. Also the runoff reduction trends show a linear response due to the increase in LID implementation ratio in the study area.

Study of diffuse source pollution management for land use and drainage system planning

2001 ◽  
Vol 44 (7) ◽  
pp. 203-208 ◽  
Author(s):  
K. Yamada ◽  
T. Funaki ◽  
S. Honda ◽  
M. Sugihara
Keyword(s):  
Land Use ◽  
Urban Area ◽  
Land Use Planning ◽  
Urban Areas ◽  
Drainage System ◽  
Pollutant Removal ◽  
Storm Events ◽  
Road Surfaces ◽  
Using Data

This study aims to clarify the mass balance of pollutants during both dry periods and storm events and to discuss the effects of some strategies such as pollutant removal, land use planning and new drainage systems by simulation. Three subjects are discussed in this paper. First, the amount of pollutants entering Lake Biwa from an urban area have been roughly estimated by using data collected by the local government. Second, many additional samples were collected from road surfaces, house roofs and parking lots to consider the role of land use in pollutant runoff. Third, some ongoing BMP projects in an urban area are introduced. As a result, some ideas on how to solve the problem of diffuse pollution in urban areas have been obtained.

scholarly journals Analysis of the Losses Due to Flood and Waterlogging Disasters in China during 2006 to 2017

Proceedings ◽  
2018 ◽  
Vol 7 (1) ◽  
pp. 25
Author(s):  
Weiwei Shao ◽  
Yuanfei Li ◽  
Dianyi Yan ◽  
Jiahong Liu ◽  
Zhiyong Yang ◽  
...  
Keyword(s):  
Flood Disaster ◽  
Disaster Mitigation ◽  
High Concentration ◽  
Rapid Urbanization ◽  
Analysis And Evaluation ◽  
Flood Disasters ◽  
Disaster Losses ◽  
Disaster Control ◽  
The Impact ◽  
The Relationship

China is in a period of rapid urbanization. Due to the high concentration of population and industries, the loss due to flood and waterlogging is becoming more and more serious. Therefore, it is of great significance to strengthen the analysis and evaluation of the losses due to flood and waterlogging disasters in China for the recent years. This study analyzed the losses caused by flood and waterlogging disasters in China from 2006 to 2017. The results showed that the most serious year affected by floods and waterlogging was 2010. However, the relationship between rainfall and flood disaster losses was not significant, which may be because the occurrence of flood disasters is caused by many factors. The spatial distribution showed that the eastern and southern parts of China suffered greater losses from the flood and waterlogging disasters because these areas are more vulnerable to floods and waterlogging disasters under the impact of both monsoons and typhoons. This study hopes to provide some reference for flood disaster control and disaster mitigation in the future.

Research on Optimization and Application of LOD Algorithm in Virtual Reality Visualization of Terrain

2014 ◽  
Vol 687-691 ◽  
pp. 1258-1261
Author(s):  
Jing Sun ◽  
Hong Tao Wang
Keyword(s):  
Virtual Reality ◽  
Real Time ◽  
Large Scale ◽  
Design Work ◽  
Terrain Rendering ◽  
Key Technology ◽  
Progressive Mesh ◽  
Key Technologies ◽  
Methods And Techniques ◽  
Visibility Culling

With the development of computer graphics, real-time rendering-based VF: technology has been applied in more and more fields. LOD is the key technology in large-scale terrain rendering. In this paper, the basic concept of LOD is introduced briefly and some algorithms of LOD in use are mentioned and analyzed; secondly as one of algorithms of LOD, View-Dependent Progressive Mesh algorithm is studied and improved, the result of implementing the large-scale terrain’s LOD by using VDPM is presented. There are key technologies in LOD Large-scale terrain real-time rendering are researched. Relative technologies are presented such as: LOD of the terrain, visibility culling, and cracks eliminate, view-dependent refine, LOD error, technologies of texture etc. Using LOD technology, VR system can greatly reduce the; number of polygons produced in real-time rendering procedure. Finally, we do experimental design work based on the methods and techniques presented by this paper.

Key Technologies Research of MEMS Pressure Sensor for Fuze

2014 ◽  
Vol 472 ◽  
pp. 242-246
Author(s):  
Bo Jiang ◽  
Xing Lin Qi ◽  
Zhi Ning Zhao
Keyword(s):  
High Temperature ◽  
Pressure Sensor ◽  
High Frequency ◽  
Development Trend ◽  
Military Industry ◽  
Key Technology ◽  
Sensor Applications ◽  
Key Technologies ◽  
Mems Technology ◽  
The Development Trend

MEMS technology has been widely used in military industry, in order to further expand the scope of the MEMS pressure sensor applications in military industry, to make fuze development toward miniaturization and intelligent, do the study on special fuze MEMS pressure sensor. Environment of MEMS pressure sensor application in fuze is analyzed, consist service treatment environment and using environment, which can provide indicators for the development of the sensor. The paper analyzes several key technology of the fuze MEMS pressure sensor, including the technique of high temperature resistant, acceleration compensation, leadless, high frequency resistant and overload resistant and so on. To sum up, the continuous development of MEMS technology can make its products meet the use environment of fuze, and the development trend of the fuze also needs the support of MEMS technology, so it is necessary and feasible to carry out the research of the fuze MEMS pressure sensor.

Key Technology of the Denture CAD/CAM System

2014 ◽  
Vol 494-495 ◽  
pp. 637-640
Author(s):  
Xiu Guang Ge ◽  
Xue Ling Jiang ◽  
Li Hui Chen ◽  
Jian Hong Liao
Keyword(s):  
Data Processing ◽  
Surface Reconstruction ◽  
Low Cost ◽  
Cnc Machining ◽  
Key Technology ◽  
Model Acquisition ◽  
Key Technologies ◽  
Cad Cam ◽  
Cad Models ◽  
Solid Foundation

The key technologies of denture CAD/CAM system were studied in this study. Key technologies include: model acquisition, data processing, surface reconstruction, creating CAD models, establish standards tooth databases, rapid prototyping and CNC machining. The results show that the actual dentures feasibility of CNC processing systems and the denture model is validated. This study lays solid foundation for the development of the low-cost, lightweight and fast denture CAD/CAM system.

Key Technology of Form Grinding Wheel’s Axis Section’s Derivation

2013 ◽  
Vol 753-755 ◽  
pp. 1557-1561
Author(s):  
Ling Zhang ◽  
Bin Yao ◽  
Zhi Huang Shen ◽  
Wen Chang Zhao ◽  
Bin Zhou
Keyword(s):  
Research Method ◽  
Screw Compressor ◽  
Grinding Wheels ◽  
Relevant Research ◽  
Key Technology ◽  
Form Grinding ◽  
Key Technologies ◽  
Twin Screw ◽  
Screw Rotors ◽  
The Mathematical Model

Upon researching on the form grinding principle of rotor of the twin-screw compressor, firstly, this article gives the mathematical model of acquiring form grinding wheels axis section from screw rotors end section which is given by a series of discrete points. Then some key technologies to solve problems during the derivation of grinding wheels axis section and relevant research method to optimize the best setting angle have been analyzed. And last, the results of simulation and actual processing prove that this method is reliable and can meet the requirements of machining precision.

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