Why DEWATS is Still not Popular in Vietnam?

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
Viet-Anh Nguyen
Keyword(s):  
Rural Areas ◽  
Local Community ◽  
Low Cost ◽  
Wastewater Management ◽  
Limited Information ◽  
Limited Participation ◽  
Management Concept ◽  
Management Schemes ◽  
Urban And Rural Areas ◽  
Local Levels

While large centralized sanitation projects are not affordable for most cases in urban and rural areas, the only way to increase sanitation coverage, especially for the poor, is to implement low-cost alternatives with decentralized sanitation management schemes where local community, administrative authorities and private sectors are involved in the decision making as well as in the exploitation process. Despite of that, there are some reasons discussed why decentralized wastewater management concept and its application is still not widely disseminated throughout Vietnam. Among institutional and managerial aspects there are weaknesses of environmental pollution control capacity at different, especially local levels, limitations of existing Vietnamese environmental standard system, and lacking of incentive measures to encourage consultants to go for the decentralized wastewater concept, as well as to force polluters to improve their situation. In term of finance, discussed pints are low wastewater fee, and limited participation of private sector in the business. In technical aspects, there are limited information of appropriate and proven technical options for different contexts, lessons on their performance and system setting up. Besides, difficulties in the household connection and in collection network are among factors. The paper also provides some examples of decentralized alternatives implemented in different sanitation projects at different scales in Vietnam.

Ecological Waste Treatment and Utilization Systems on Low-Cost, Energy-Saving/Generating and Resources Recoverable Technology for Water Pollution Control in China

1991 ◽  
Vol 24 (5) ◽  
pp. 9-19 ◽  
Author(s):  
Baozhen Wang
Keyword(s):  
Pollution Control ◽  
Rural Areas ◽  
Waste Treatment ◽  
Low Cost ◽  
Fish Ponds ◽  
Receiving Waters ◽  
Recoverable Resources ◽  
Urban And Rural Areas ◽  
Rice Fish ◽  
Utilization Of Wastes

Various ecological waste treatment and utilization systems (EWTUS) available in urban and rural areas in China are described, among which are land treatment and utilization systems (LTUS), eco-pond systems mainly consisting of macrohydrophytes-growing ponds, fish ponds and duck/geese ponds, and comprehensive circulation eco–systems for the treatment and utilization of wastes in rural areas, such as semi–closed eco–system in fish ponds, “rice–fish” and “rice–azolla–fish” symbiotic systems, recycling eco–systems with methane-generating digesters as central link, and comprehensive recycling eco–systems with digesters and eco–ponds as central link. In the various EWTUS, the sewage and wastewaters and other wastes are utilized and converted into various forms of recoverable resources and/or energy, while they are being purified to good quality effluents, meeting their respective discharge standards, and hence acceptable to receiving waters.

Managed aquifer recharge: rediscovering nature as a leading edge technology

2010 ◽  
Vol 62 (10) ◽  
pp. 2338-2345 ◽  
Author(s):  
P. Dillon ◽  
S. Toze ◽  
D. Page ◽  
J. Vanderzalm ◽  
E. Bekele ◽  
...  
Keyword(s):  
Rural Areas ◽  
Low Cost ◽  
Leading Edge ◽  
Managed Aquifer Recharge ◽  
Aquifer Recharge ◽  
Water Supplies ◽  
Water And Wastewater Treatment ◽  
Urban Hydrogeology ◽  
Urban And Rural Areas ◽  
Treated Sewage Effluent

Use of Managed Aquifer Recharge (MAR) has rapidly increased in Australia, USA, and Europe in recent years as an efficient means of recycling stormwater or treated sewage effluent for non-potable and indirect potable reuse in urban and rural areas. Yet aquifers have been relied on knowingly for water storage and unwittingly for water treatment for millennia. Hence if ‘leading edge’ is defined as ‘the foremost part of a trend; a vanguard’, it would be misleading to claim managed aquifer recharge as a leading edge technology. However it has taken a significant investment in scientific research in recent years to demonstrate the effectiveness of aquifers as sustainable treatment systems to enable managed aquifer recharge to be recognised along side engineered treatment systems in water recycling. It is a ‘cross-over’ technology that is applicable to water and wastewater treatment and makes use of passive low energy processes to spectacularly reduce the energy requirements for water supply. It is robust within limits, has low cost, is suitable from village to city scale supplies, and offers as yet almost untapped opportunities for producing safe drinking water supplies where they do not yet exist. It will have an increasingly valued role in securing water supplies to sustain cities affected by climate change and population growth. However it is not a universal panacea and relies on the presence of suitable aquifers and sources of water together with effective governance to ensure human health and environment protection and water resources planning and management. This paper describes managed aquifer recharge, illustrates its use in Australia, outlining economics, guidelines and policies, and presents some of the knowledge about aquifer treatment processes that are revealing the latent value of aquifers as urban water infrastructure and provide a driver to improving our understanding of urban hydrogeology.

scholarly journals Compression Behaviour of Polypropylene Fibre Reinforced Cellular Light Weight Concrete Masonry Prism

2020 ◽  
Vol 30 (1) ◽  
pp. 145-160
Author(s):  
Ramalingam Vijayalakshmi ◽  
Srinivasan Ramanagopal
Keyword(s):  
Sustainable Development ◽  
Rural Areas ◽  
High Performance ◽  
Building Materials ◽  
Lightweight Concrete ◽  
Low Cost ◽  
Polypropylene Fibre ◽  
Clay Bricks ◽  
Structural Applications ◽  
Urban And Rural Areas

AbstractSustainable development of the built environment in developing countries is a major challenge in the 21st century. The use of local materials in the construction of buildings is one of the potential ways to support sustainable development in both urban and rural areas where burnt clay bricks are used predominantly. This work focuses mainly on the use of polypropylene micro fibers in ordinary Cellular Lightweight Concrete blocks. The main objective is to develop a high-performance fibre reinforced cellular concrete to provide a better alternative than clay bricks for structural applications of masonry. This paper presents the stress-strain behaviour of polypropylene fibre reinforced Cellular Lightweight Concrete stack bonded prisms under axial compression. Masonry compressive strength is typically obtained by testing stack bonded prisms under compression normal to its bed joint. Use of micro-fibres enhances the pre-cracking behaviour of masonry by arresting cracks at micro-scale in the post-peak region. These efforts are necessary to ensure that CLC blocks become more accepted in the world of building materials and considered as a reliable option for providing low-cost housing.

scholarly journals Photogrammetric mapping using unmanned aerial vehicle

2014 ◽  
Vol XL-1 ◽  
pp. 129-133 ◽  
Author(s):  
N. Graça ◽  
E. Mitishita ◽  
J. Gonçalves
Keyword(s):  
Unmanned Aerial Vehicle ◽  
Rural Areas ◽  
Low Cost ◽  
Direct Determination ◽  
Aerial Images ◽  
Image Block ◽  
Exterior Orientation ◽  
Aerial Vehicle ◽  
Urban And Rural Areas ◽  
Orientation Parameters

Nowadays Unmanned Aerial Vehicle (UAV) technology has attracted attention for aerial photogrammetric mapping. The low cost and the feasibility to automatic flight along commanded waypoints can be considered as the main advantages of this technology in photogrammetric applications. Using GNSS/INS technologies the images are taken at the planned position of the exposure station and the exterior orientation parameters (position Xo, Yo, Zo and attitude ω, φ, χ) of images can be direct determined. However, common UAVs (off-the-shelf) do not replace the traditional aircraft platform. Overall, the main shortcomings are related to: difficulties to obtain the authorization to perform the flight in urban and rural areas, platform stability, safety flight, stability of the image block configuration, high number of the images and inaccuracies of the direct determination of the exterior orientation parameters of the images. In this paper are shown the obtained results from the project photogrammetric mapping using aerial images from the SIMEPAR UAV system. The PIPER J3 UAV Hydro aircraft was used. It has a micro pilot MP2128g. The system is fully integrated with 3-axis gyros/accelerometers, GPS, pressure altimeter, pressure airspeed sensors. A Sony Cyber-shot DSC-W300 was calibrated and used to get the image block. The flight height was close to 400 m, resulting GSD near to 0.10 m. The state of the art of the used technology, methodologies and the obtained results are shown and discussed. Finally advantages/shortcomings found in the study and main conclusions are presented

Educational seismology in Nepali schools: tailored solutions to start a program

2020 ◽  
Author(s):  
Shiba Subedi ◽  
György Hetényi ◽  
Paul Denton ◽  
Anne Sauron
Keyword(s):  
Rural Areas ◽  
Local Community ◽  
Low Cost ◽  
Plate Boundary ◽  
School Curriculum ◽  
Learning By Doing ◽  
Educational Materials ◽  
Gorkha Earthquake ◽  
Classroom Activities ◽  
Earthquake Education

<p>Nepal is located above the convergent India-Eurasia plate boundary and has repeatedly experienced devastating earthquakes. During the 2015 magnitude 7.8 Gorkha earthquake, an often-reported experience was that people were not aware of the threatening seismic hazard and have insufficient level of preparedness. An important source of the problem is that earthquake-related topics are not part of the school curriculum. Earthquake education reaching a broad group of the population early in their lives is therefore strongly needed.</p><p>We have established an initiative in Nepal to introduce seismology in schools, which relies on two pillars: a low-cost seismic network with stations installed in schools (presented in another session) and educational activities in schools on earthquakes and the related hazards. For classical teaching, we have prepared educational materials adapted to the Nepali school system, labels and language. By using these materials, not only students in the schools but also local people in the community can learn earthquake education and follow guidelines for better preparedness. We also developed educational sessions using Raspberry Shake low-cost seismometers, for example to record earthquake waveforms and to allow learning-by-doing classroom activities.</p><p>For efficient implementation, we have organized a 2-day workshop for the school teachers to prepare them for the new teaching, which was presented by experts in the field and included lots of discussion to find the adapted level. Moreover, during our field visits, we give special lectures and also perform earthquake drills with the students. Well-prepared educational materials such as flyers and stickers are distributed to students, and demonstration tools for physics to schools. All the material from our project is freely available on our program’s website: http://seismoschoolnp.org.</p><p>We have started the program by choosing 22 schools in the region, and establishing direct contact with the teachers, principals and the local communities. We found this was an efficient way to implement the project, especially in rural areas. The preliminary and personal feedbacks reflect that this program is well received. A survey-based evaluation on the program’s impact on the local community is being carried out, and we plan to present results at the conference. We hope that the project is able to help this region to prepare for future earthquakes, and we seek that the initiative is spread to other regions  to make earthquake-safer communities across Nepal.</p>

scholarly journals Application and Validation of a Municipal Administrative Area Spatial Zoning Model in Village-Town System Planning

2019 ◽  
Vol 11 (7) ◽  
pp. 1855 ◽  
Author(s):  
Yujing Zhao ◽  
Hong Leng ◽  
Pingjun Sun ◽  
Qing Yuan
Keyword(s):  
Land Use Planning ◽  
Rural Areas ◽  
High Efficiency ◽  
Low Cost ◽  
Model Development ◽  
Urban System ◽  
Planning Model ◽  
System Planning ◽  
Administrative Area ◽  
Urban And Rural Areas

The overall planning of urban and rural areas is the focus of municipal administrative area (MAA) planning in the process of economic globalization, and village-town system planning is the key to the overall planning of urban and rural areas. Based on the theory of spatial equilibrium and economic logic, an objective municipal administrative area spatial zoning model (M-MSZ) was constructed in our previous study. The M-MSZ model can provide guidance in the planning of a village-town system. This paper takes a city in the south of Heilongjiang Province in China as an example and compares the M-MSZ model with six traditional MAA spatial zoning models (the urban growth boundary model, land use planning model, spatial governance zoning model, major MAA location, layout and planning model, development timing-order and zoning model, and scale and function zoning model) to verify the value and superiority of the M-MSZ model in the planning of a village-town system. The consistency Kappa values were 78.2%, 83.3%, 82.3%, 79.8%, 75.7%, and 83.9%, respectively, which means that the M-MSZ model was highly consistent with those comparison models. Meanwhile, the regression coefficient R2 is higher than that of the traditional spatial zoning models, which means that the objectivity of the M-MSZ model is higher than that of traditional models. The superiority of the M-MSZ model over the traditional MAA spatial zoning model lies not only in its capacity to grasp the core content of village-town system planning, but also in its capacity to unify the decentralized urban system planning models that are used for village-town system planning, while realizing the objectivity of a weight assignment. Its unified model structure, objective integrated model system, and high accuracy make the M-MSZ model capable of solving the key problems associated with village-town system planning, with many advantages, such as easy operation, high efficiency, good inheritance, low cost, and greater objectivity, detail, and accuracy. In addition, it can provide a reference for the development model of a MAA village-town system.

scholarly journals Real-Time Vehicle Positioning and Mapping Using Graph Optimization

Sensors ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 2815
Author(s):  
Anweshan Das ◽  
Jos Elfring ◽  
Gijs Dubbelman
Keyword(s):  
Real Time ◽  
Rural Areas ◽  
Low Cost ◽  
Ground Truth ◽  
Visual Odometry ◽  
Graph Optimization ◽  
Urban And Rural Areas ◽  
Vehicle Positioning ◽  
Rate Sensor ◽  
Pose Graph Optimization

In this work, we propose and evaluate a pose-graph optimization-based real-time multi-sensor fusion framework for vehicle positioning using low-cost automotive-grade sensors. Pose-graphs can model multiple absolute and relative vehicle positioning sensor measurements and can be optimized using nonlinear techniques. We model pose-graphs using measurements from a precise stereo camera-based visual odometry system, a robust odometry system using the in-vehicle velocity and yaw-rate sensor, and an automotive-grade GNSS receiver. Our evaluation is based on a dataset with 180 km of vehicle trajectories recorded in highway, urban, and rural areas, accompanied by postprocessed Real-Time Kinematic GNSS as ground truth. We compare the architecture’s performance with (i) vehicle odometry and GNSS fusion and (ii) stereo visual odometry, vehicle odometry, and GNSS fusion; for offline and real-time optimization strategies. The results exhibit a 20.86% reduction in the localization error’s standard deviation and a significant reduction in outliers when compared with automotive-grade GNSS receivers.

scholarly journals Potential Use of UAV-Based Mapping System to Accelerate the Production of Parcel Boundary Map in Indonesia

2019 ◽  
Author(s):  
Catur A. Rokhmana ◽  
Imung A. Gumeidhidta ◽  
Martinus E. Tjahjadi
Keyword(s):  
Rural Area ◽  
Rural Areas ◽  
Urban Areas ◽  
Low Cost ◽  
Threshold Values ◽  
Mapping System ◽  
Boundary Map ◽  
Aerial Vehicle ◽  
Urban And Rural Areas ◽  
Potential Use

Recently, the Ministry of Agrarian Affairs announces a decree to accelerate a completion of the registration of land parcels of cadaster maps up to a scale of 1:1000. It is known that the use of Unmanned Aerial Vehicle based mapping system (UAV-Map) can produce orthophoto image with spatial resolution less than 10 cm, but it is not yet known whether UAV-Map implementation is able to identify boundary of land parcel in any condition. Therefore, this paper would analyze the planimetric accuracy that is conformed to the regulation of State Minister of Agrarian Affairs/Head of National Land Agency No.3, 1997 both for urban and rural areas. Two testing areas are established which located on urban area and rural area respectively. Flight missions are conducted using a fixed-wing aircraft equipped with a consumer grade camera and a navigational grade GPS-INS system. Orthophoto maps are produced by using Agisoft Photoscan software. Digitizing of parcel boundaries are followed both on an existing map and on the orthophoto maps. Deviations in areas are expressed in terms of the RMSE figures. Planimetric accuracies as indicated by the RMSE value are of 0,044 m for urban areas and 0,122 m for rural area. It is showed that all discrepancies of the parcels area are still below the recommended threshold values of the regulation. It is can be concluded that the orthophoto maps obtained by using a low cost UAV-Map system can be used to identify land parcels boundaries and to determine the parcel area.

scholarly journals Implementation of Financing Compass for Welfare Partner Operational System Grameen Bank in Banyumas Regency

2018 ◽  
Vol 3 (1) ◽  
pp. 21-36
Author(s):  
Apik Anitasari Intan Saputri
Keyword(s):  
Low Income ◽  
Rural Areas ◽  
Local Community ◽  
Service Providers ◽  
Financial Institution ◽  
Field Research ◽  
Grameen Bank ◽  
Savings And Loans ◽  
Business World ◽  
Urban And Rural Areas

Indonesia has a variety of microfinance service providers such as Commercial Banks, Rural Banks, Non-Bank Financial Institutions (LKBB), Micro Finance Institutions (MFIs), Savings and Loans Cooperatives (KSP) and other semiformal and informal institutions operating at the local community level. One Non-Bank Financial Institution operating in Indonesia is an institution with a group finance system - commonly referred to as Grameen bank. Its business objectives are to tackle poverty or other problems such as education, health, access to technology, and environmental issues that may threaten people and society. The research method used is field research with a sociological juridical approach. With the establishment of a poverty alleviation program involving many women, Grameen banks became one of the integrated institutions in public health programs by establishing sanitation and water programs as a health support product of its partners. This product is called KOMPAK and aims to develop financing products for the development of water quality and sanitation improvement among low-income people. Women Grameen bank actors are not only a target in the development of the business world, they also provide education on improving the quality of life and raise awareness of the importance of water hygiene and sanitation health. The company offers loans to economically active but low-income women especially those living in urban and rural areas.

scholarly journals Differential Use of Nectar Feeders Among Migrant and Resident Hummingbirds

2019 ◽  
Vol 12 ◽  
pp. 194008291987896
Author(s):  
Laura E. Nuñez-Rosas ◽  
María Del Coro Arizmendi
Keyword(s):  
Rural Area ◽  
Rural Areas ◽  
Low Cost ◽  
Food Resource ◽  
Food Sources ◽  
Rural Site ◽  
Environmental Complexity ◽  
Extra Food ◽  
Protected Natural Area ◽  
Urban And Rural Areas

The use of artificial nectar feeders has increased in the past decades. Feeders represent extra food resource at a low cost that can cause an increment of hummingbird populations in urban and rural areas. Assuming that migrant hummingbirds have had contact with feeders in breeding areas, we propose that when feeders are held for the first time in an area, migrant hummingbirds will be visiting the novel resource faster than the resident species. Second, assuming that the finding of new resources is correlated with habitat structure, hummingbirds will visit earlier the feeders in places with less environmental complexity as a rural area. This study was done at the southern coast of the Mexican state of Jalisco in a rural area and in a protected natural area. Three twin feeders were placed in each area and visitation was recorded in periods of 50 minutes during morning and afternoon. We found that (a) migrant hummingbird began visiting the feeders in less time than residents at all the feeders, (b) once migrants used the feeder’s residents began visiting, and (c) in the rural site visitation occurred earlier than in the natural forest. These findings support that hummingbirds learn to use novel food sources and remember used resources recognizing them at the landscape level, and that residents never exposed to an artificial food source learn to use them faster in more open areas and after migrants used them.

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