scholarly journals Public Participatory Role in Urban Flood Risk Management of Ho Chi Minh City - Vietnam: From Awareness to Action

2019 ◽  
pp. 1-10
Author(s):  
Pham Thi Anh ◽  
Nguyen Thi Bao Ngoc
Keyword(s):  
Urban Areas ◽  
Drainage System ◽  
Ho Chi Minh City ◽  
Urban Flood ◽  
Garbage Disposal ◽  
Large Numbers ◽  
Technical Effort ◽  
And Behavior ◽  
The City ◽  
Flooded Areas

Urban flooding has become a regular phenomenon in many towns and cities in the world over the past years. Flooding in urban areas in Ho Chi Minh City poses serious challenges not only by affecting large numbers of people and properties in urban areas but also directly hindering the economic growth of the city. Despite the huge technical effort to improve the city's drainage system, which is necessitated by phenomenal growth of the city and the challenges of climate change and land subsidence, it is impossible to put and end to flooding. The human factor appears an important element in the flooding problem and the efforts of flood reduction. In this study the emphasis was laid on the issue of inappropriate garbage disposal which leads to obstruction of drainage systems. As a part of a well-planned strategy an interactive survey was conducted in about 820 households in flooding areas. The survey focused on awareness and behavior of public garbage disposal of households living in flooded areas. People have an understanding of the causes of flooding, and have a sense of environmental protection, they can contribute to reducing flooding. In addition to technological solutions, community awareness, solutions for management and sanctioning are necessary.

scholarly journals GIS-Based Urban Flood Risk Assessment and Management—A Case Study of Delhi National Capital Territory (NCT), India

2021 ◽  
Vol 13 (22) ◽  
pp. 12850
Author(s):  
Pallavi Tomar ◽  
Suraj Kumar Singh ◽  
Shruti Kanga ◽  
Gowhar Meraj ◽  
Nikola Kranjčić ◽  
...  
Keyword(s):  
Urban Areas ◽  
Field Survey ◽  
Drainage System ◽  
Yamuna River ◽  
Urban Centers ◽  
Urban Floods ◽  
Urban Flood ◽  
National Capital ◽  
Risk Assessment And Management

Urban floods are very destructive and have significant socioeconomic repercussions in regions with a common flooding prevalence. Various researchers have laid down numerous approaches for analyzing the evolution of floods and their consequences. One primary goal of such approaches is to identify the areas vulnerable to floods for risk reduction and management purposes. The present paper proposes an integrated remote sensing, geographic information system (GIS), and field survey-based approach for identifying and predicting urban flood-prone areas. The work is unique in theory since the methodology proposed finds application in urban areas wherein the cause of flooding, in addition to heavy rainfall, is also the inefficient urban drainage system. The work has been carried out in Delhi’s Yamuna River National Capital Territory (NCT) area, considered one of India’s most frequently flooded urban centers, to analyze the causes of its flooding and supplement the existing forecasting models. Research is based on an integrated strategy to evaluate and map the highest flood boundary and identify the area affected along the Yamuna River NCT of Delhi. In addition to understanding the causal factors behind frequent flooding in the area, using field-based information, we developed a GIS model to help authorities to manage the floods using catchment precipitation and gauge level relationship. The identification of areas susceptible to floods shall act as an early warning tool to safeguard life and property and help authorities plan in advance for the eventuality of such an event in the study area.

scholarly journals Assessment of Geologic Controls of Flooding in Parts of OBIO/AKPOR L.G.A., Rivers State, Nigeria

2021 ◽  
Vol 3 (2) ◽  
Author(s):  
Eruebi Toju B ◽  
Eze Uchechukwu Stanley ◽  
Ibitoye Taiwo Abel ◽  
Abolarin Olayiwola Macpaul
Keyword(s):  
Hydraulic Conductivity ◽  
Specific Gravity ◽  
Bulk Density ◽  
Urban Areas ◽  
Drainage System ◽  
Soil Samples ◽  
Laboratory Analysis ◽  
Drainage Channels ◽  
Rivers State ◽  
Flooded Areas

Flooding of Municipal areas is a frequent environmental occurrence in Rivers State that occurs when rainfall runoff meets land surfaces with low water absorbing capacity or when it overwhelms drainage channels. In order to assess the flood situation in the study area, an integrated method which involves Field-measurement, Geographic information system (GIS), Laboratory analysis of soil samples and topographic studies were employed. Digital Elevation Model of the study area reveals that the flooded areas are situated in areas with elevations lower than its surrounding, thereby acting as a natural basin to retain flood waters after rainfall. Four holes were drilled to depth of 3m to obtain soil samples at 1 m sampling interval, from which laboratory analysis was carried out to determine some geotechnical parameters such as soil’s particle size, specific gravity, bulk density, porosity, moisture content, permeability and hydraulic conductivity. Results from the analysis show that permeability, hydraulic conductivity and porosity diminishes with respect to depth. The soil in the flooded areas have high fines content (silt and clay), high bulk density which increase with depth and a specific gravity that is typical of organic rich soils that contain sand mixed with a considerable amount of fines. At Nkpolu, mean permeability rates of 0.003cm/sec, 0.009cm/sec and 0.033cm/sec were obtained at 1, 2 and 3m respectively. At Eneka, mean permeability rates of 0.011cm/sec, 0.018cm/sec and 0.014cm/sec were obtained at 1, 2 and 3m respectively, while at Rukpokwu, mean Permeability rates of 0.021cm/sec was obtained at 1m, while 0.006cm/sec was obtained at 2 and 3m respectively. The Mean hydraulic conductivity for the locations under study is of the order of 10-4ft/day. This study has shown that the flooded areas are located in low lying urban areas which act as basins, therefore, the top soil is crusted with highly compacted soil horizons beneath. With high and frequent rainfall in the region which generates a lot of runoff, in addition to poor drainage system, flooding of the study area occurs frequently. Therefore, construction and maintenance of efficient drainage channels for an effective solution to urban pluvial flooding in the study area are thereby recommended.

scholarly journals Using urban morphology for flood risk in residential areas in Ho Chi Minh city

2016 ◽  
Vol 19 (2) ◽  
pp. 146-153
Author(s):  
Hoa Thanh Le ◽  
Chau Thi Phuong Nguyen
Keyword(s):  
Land Use ◽  
Fractal Geometry ◽  
Urban Areas ◽  
Large Scale ◽  
Urban Morphology ◽  
Ho Chi Minh City ◽  
Residential Density ◽  
Urban Center ◽  
Rapid Urbanization ◽  
The City

Urban morphology in urban studies is used to classify and manage the distribution of urban densities. In urban planning, it helps to identify the emerging problems and solve the disorder of urban functions as in the megacity of Ho Chi Minh City. Rapid urbanization has increased the development footprint with disordered densities of building footprint, incomplete infrastructure and urban - peripheral instability. And it, then, caused more flood problems to the city. This study was based on applying fractal geometry, GIS on large-scale maps for identifying residential density based on urban morphology. The land-use map and the building footprints map of 2010 were integrated in fractal geometry to analyze the distribution of urban areas by the large scale of GIS data. This study showed HCMC had problems on irrational development in residential densities areas; and uneven development of population and residential density between the urban areas. At block scale of land-use block, in urban center had highest densities of building footprints and population, then, the medium densities in developing districts and rural-sub-districts. With these densities, there was more flood in high density areas, as in urban center, and less flood in lower density areas, as in sub-urban areas. These problems may cause some limitations to development of social, commercial, industrial, and infrastructure in HCMC. City needs to have flood control and management for development of the city.

scholarly journals Water footprint assessment for citizens in Ho Chi Minh city

2020 ◽  
Vol 4 (1) ◽  
pp. first
Author(s):  
Truong Thanh Canh ◽  
Thuy-Trang Thi Nguyen ◽  
Anh Hoang Le
Keyword(s):  
Water Consumption ◽  
Urban Areas ◽  
Water Footprint ◽  
Agricultural Products ◽  
Green Water ◽  
Ho Chi Minh City ◽  
Eating Habit ◽  
Agriculture Industry ◽  
The Individual ◽  
And Behavior

The research conducted a survey of the water consumption in Ho Chi Minh City through the consumption of products from agriculture, industry and domestic. The research identified green water, blue water and grey water footprints in consuming products. Then personal water footprints were calculated and evaluated. The results showed that the average personal water footprint in district 3 was 1556 m3/year (77.15% for agriculture, 15.59% for industry and 7.26% for domestic), district 10 was 1587 m3/year (77.58% for agriculture, 15.17% for industry and 7.25% domestic), Nha Be district is 1681 m3/year (80.48% for agriculture, 12.97% for industry and 6.55% for domestic) and Binh Chanh district was 1744 m3/year (81.57% for agriculture, 11.88% for industry and 6.55% for domestic). In the individual components of the water footprint, water footprints in consuming agricultural products accounted for the major percentage and determined the personal water footprint. The results showed that the individual water footprints in countryside areas were higher than those in urban areas. Depending on the amount and forms of each individual's consumption, their eating habit and daily activities, and the sexes, the personal water footprints were different. The perception and behavior of individuals' water consumption also significantly influenced the overall personal water footprints.

scholarly journals Contributions to reduce the flood problems in critical points of the micro drainage system in the city of Carazinho

2019 ◽  
Vol 23 ◽  
pp. 6
Author(s):  
Carolina Pasquetti Koppe ◽  
Vinícius Scortegagna ◽  
Virgínia Meneguzzi ◽  
Anelise Sertoli Lopes Gil ◽  
Matheus De Conto Ferreira ◽  
...  
Keyword(s):  
Urban Environment ◽  
Flow Rate ◽  
Surface Runoff ◽  
Urban Areas ◽  
Hydrological Cycle ◽  
Drainage System ◽  
Control Measures ◽  
Control Devices ◽  
And Control ◽  
The City

With the emergence of excessive flooding in the urban environment, the need for unconventional drainage control measures within the limitations of conventional solutions becomes evident. In the present study, infiltration trenches and reservoirs that collect and reserve rainwater were designed as control devices, attenuating the socio-environmental impacts caused by waterproofing of urban areas in the hydrological cycle and in the behavior of the hydrographic basins in question. The measurements were made for two flooding points found in the city of Carazinho – RS, located on Marquês do Pombal Street and São Bento Avenue, due to the obstruction of gutters and street inlets, paving and waterproofing of the ground due to urbanization, lack of maintenance and cleaning of the micro drainage system along with the inability of the system to collect all the volume of water from the runoff. The reductions in flow rate in these areas through the use of trenches were 16% and 15% for the first and second flooding point, respectively, while the use of the delay reservoirs together with the infiltration trenches resulted in a 29% reduction in the first flooding point and 27.5% in the second flooding point. Therefore, it is evident that the use of unconventional control measures is vital to the reduction of the peaks of the flow rate and control of the surface runoff.

scholarly journals Climate Justice Planning in Global South: Applying a Coupled Nature–Human Flood Risk Assessment Framework in a Case for Ho Chi Minh City, Vietnam

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2021
Author(s):  
Chen-Fa Wu ◽  
Szu-Hung Chen ◽  
Ching-Wen Cheng ◽  
Luu Van Thong Trac
Keyword(s):  
Flood Risk ◽  
Flood Hazard ◽  
Climate Justice ◽  
Ho Chi Minh City ◽  
Flood Risk Assessment ◽  
Urban Floods ◽  
Flood Vulnerability ◽  
Urban Flood ◽  
Vulnerability Map ◽  
The City

Developing countries in the global south that contribute less to climate change have suffered greater from its impacts, such as extreme climatic events and disasters compared to developed countries, causing climate justice concerns globally. Ho Chi Minh City has experienced increased intensity and frequency of climate change-induced urban floods, causing socio-economic damage that disturbs their livelihoods while urban populations continue to grow. This study aims to establish a citywide flood risk map to inform risk management in the city and address climate justice locally. This study applied a flood risk assessment framework integrating a coupled nature–human approach and examined the spatial distribution of urban flood hazard and urban flood vulnerability. A flood hazard map was generated using selected morphological and hydro-meteorological indicators. A flood vulnerability map was generated based on a literature review and a social survey weighed by experts’ priorities using the Fuzzy Delphi Method and Analytic Network Process. Vulnerability indicators including demographic characteristics, infrastructure, and land use patterns were used to generate a flood vulnerability map. The results illustrate that almost the entire central and northeastern parts of the city are at high flood risk, whereas the western part is at low flood risk. The findings have implications in urban planning via identifying risk hot spots in order to prioritize resources for mitigating hazards and enhancing community resilience to urban floods.

Management of the Investment Potential of Sustainable Development of the City

2014 ◽  
Vol 587-589 ◽  
pp. 132-135
Author(s):  
Leonid U. Stupishin ◽  
Larisa V. Sevrukova ◽  
Maria L Moshkevich
Keyword(s):  
Sustainable Development ◽  
Urban Development ◽  
Urban Areas ◽  
Future Generations ◽  
Basic Principles ◽  
Industrial Enterprises ◽  
Large Numbers ◽  
Environmental Criteria ◽  
Irreparable Harm ◽  
The City

The term "sustainable development" appeared not so long ago. The growing concentration of industrial enterprises situated on urban areas, the uncontrolled increase in the scale of development, reduction the share of the recreational areas, replacing the areas of industrial purpose and new lines of transport and engineering service lines, has led to imbalance of technogenic and natural environment. The larger and more comfortable become the city, the more resources they need and the higher risk the natural of irreparable harm for the environment. This problem is connected, firstly, with the concentration of large numbers of people in one place, secondly, to human psychology, and ethics. It is hard to realize that the consumption of resources may be limited and you should think about the needs of future generations. In contrast to this tendency the idea about the need to rethink the traditional principles of urban development and forming the new basic principles of urban development, was put forward. It called the concept of sustainable development. This concept is based on a combination of economic, social and environmental criteria, which take into account the interests of future generations.

Comprehensive flood control involving citizens in a Japanese watershed

2013 ◽  
Vol 68 (4) ◽  
pp. 791-798 ◽  
Author(s):  
Sampei Yamashita ◽  
Yukihiro Shimatani ◽  
Ryoichi Watanabe ◽  
Toshiyuki Moriyama ◽  
Tomoko Minagawa ◽  
...  
Keyword(s):  
Urban Areas ◽  
Heavy Rainfall ◽  
Flood Control ◽  
Drainage System ◽  
Flood Disaster ◽  
Control Measures ◽  
The City

In July 2009, the city of Fukuoka, Japan experienced a flood disaster along the Hii River, which runs through densely populated, concrete-covered areas of the city. The drainage system was overwhelmed and the river overflowed due to heavy rainfall and rapid runoff. The event led citizens in its watershed to plan and implement comprehensive flood control. The plan aims not only to mitigate floods but also to revitalize the river environment and populated communities in urban areas. This study reports the activities led by the citizens. They organized and carried out civic forums, workshops, and fieldwork to share views as to how the flood disaster was caused, how floods in the watershed should be controlled, and how the river environment should be rehabilitated. This study illuminates how people, including the flood victims and municipal engineers, can change drastically and communicate effectively in the course of discussing and implementing the comprehensive flood control measures.

scholarly journals City: Melting Locus and Cross-Cultural Difference Versus Rural (The Case of Tirana after the 90s)

2017 ◽  
Vol 6 (s2) ◽  
pp. 129-135
Author(s):  
Ana Rusta
Keyword(s):  
Internal Migration ◽  
Rural Areas ◽  
Urban Areas ◽  
Cultural Difference ◽  
Communist Regime ◽  
Rural And Urban ◽  
Number Of Factors ◽  
Large Numbers ◽  
Complete Disintegration ◽  
The City

Abstract After the 1990s, with the recognition of a number of rights denied during the communist regime, such as free movement, there was a large movement of internal migration from rural areas to large urban areas, especially towards the city of Tirana. A number of factors, mainly economic and social factors, favored this massive population movement from rural areas to urban areas. Almost complete disintegration of the economic base in rural areas, as well as infrastructure shortages, have pushed large numbers of population into urban areas, especially towards the periphery, across migration flows. On the other hand, enormous rural migration not only redefined the physical boundaries of the city but also produced new social and economic forms. As a result of interaction and confrontation of the social and cultural mentalities between rural and urban population (the case of Tirana) emerged several phenomena that created a clear demarcation area under the cultural and social aspects, as well as semi-rural or semiurban hybrid interaction. In this perspective, this essay attempts to use a multidisciplinary approach to explain the general factors of this massive internal migration but also some aspects of the newly-formed landscape of social and cultural mentalities after this migration. As a result of this cultural interaction, we attempt to understand the reality of various subcultures in the city of Tirana and social behaviors in order to clarify the effects of this process regarding the dilemma on the ruralization of the urban or urbanization of the rural population.

scholarly journals Some challenges for the youth in suburban areas of Ho Chi Minh City - Case study in Binh Tan district

2014 ◽  
Vol 17 (4) ◽  
pp. 55-72
Author(s):  
Trang Thi Thu Ngo ◽  
Thuy Thi Thu Chau
Keyword(s):  
Urban Space ◽  
Urban Areas ◽  
Ho Chi Minh City ◽  
Suburban Areas ◽  
Space Expansion ◽  
To Come ◽  
Industrial Zones ◽  
The City ◽  
Depth Interviews

Urbanization is an inevitable trend of developing countries. Urbanization process is going on in Vietnam, especially in Ha Noicapital and Ho Chi Minh City. Ho Chi Minh City attracted the majority of the youth from provinces to come and work in industrial zones, export processing zones located in suburban areas (of the City). The population growth along with the increased demand for services did promote the expansion of urban land. Fast urban space expansion has posed a lot of challenges for young people especially in terms of lifestyle. Will these youth be susceptible to the bad side of society in the transition from rural to urban areas? The author has chosen to study the area of Binh Tan District in Ho Chi Minh City where high spontaneous urbanization takes place. Through field observations, the author observed life in the studied area which was Binh Tri Dong B Ward, Binh Tan District with the implementation of in-depth interviews for 45 subjects in three population groups under study such as: local people, new residents and immigrants. By method of interdisciplinary research in terms of sociology and geography, the author found out some challenges that the youth face in the process of suburban urbanization

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