Communication protocols evaluation for a wireless rainfall monitoring network in an urban area

Rainfall monitoring networks are key elements for the development of alerts and prediction models for communities at risk of flooding during high intensity rainfall events. Currently, most of these networks send the precipitation measurement to a data center in real-time using wireless communication protocols, avoiding travel to the measurement site. An Early Warning System (EWS) for pluvial flash floods developed in Barranquilla (Colombia), used the GPRS protocol to send rain gauge data in real-time to a web server for further processing; however, this protocol has a high consumption of energy and also high maintenance costs. This article carried out an evaluation in terms of link budget, link profile, energy consumption and devices costs of three low-power wireless communication protocols, Zigbee, LoRaWAN and Sigfox, to determine which one is the most suitable for the EWS of the city of Barranquilla. To perform the evaluation, a wireless sensor network was designed and characterized for Zigbee and LoRaWAN with Radio Mobile tool taking into account the measurement points implemented with GPRS network. The evaluation included the power consumption of Zigbee, LoRaWAN and Sigfox. From the results of simulations, LoRaWAN and Zigbee network has similar radio signal received and the LoRaWAN network obtains the least losses per path. As for power consumption, the LoRaWAN devices has the lowest energy consumption, as well as, the LoRaWAN network sensor nodes are cheaper. Finally, the protocol with the best general performance was LoRAWAN, since complies with the communication, consumption and cost requirements

WOMEN’S WATER, WOMEN’S WORK: EVALUATING DECENTRALIZED MANAGEMENT OF DEEP BOREHOLE WELLS FOR IMPROVED RURAL WATER ACCESS IN TAWA FALL VILLAGE, SENEGAL

Throughout the developing world, countries face a number of issues regarding the health and welfare of their populations. One issue that stands out with critical and growing importance is the availability-and accessibility-of water. Across the Sahel, access to potable water for domestic use, as well as contaminant-free water for agricultural and animal husbandry purposes is of growing concern. This study evaluates Government of Senegal efforts at improving rural water access through public-private operation contracts to manage deep groundwater resources. In West Africa, Senegal currently counts itself among the few Sahelian countries having sufficient freshwater supplies to support its population’s growing domestic and industrial needs, though this is threatened by global climate change, and the Sahel’s natural ecological variability. Surface water supplies the majority of urban areas in the country, while rural regions commonly draw water from groundwater systems. From 2002-2009, the Senegalese government, in cooperation with external partners, launched the Projet d’Organisation et de Gestion Villageoise (Village Organization and Management Project) which aimed to reduce poverty and improve quality-of-life at the village level. In 2007, the village of Tawa Fall received the technology necessary to access deep groundwater resources through this project. In a unique public-private system, the government of Senegal engaged Associations d’Usagers de Forages (Drilling User Associations, ASUFOR) to manage operation and maintenance contracts for these boreholes. Proceeds from the sale of water is managed by ASUFOR associations, and used both for borehole maintenance and to further village development. This study explores the effectiveness of deep borehole wells at reducing women’s workload, evaluating the wells’ effects on communities from the perspective of women as primary domestic water drawers and users. The study also examines the efficiency of the ASUFOR system at maintaining decentralized management of natural resources. It examines how Tawa Fall’s ASUFOR committee has used proceeds from the sale of groundwater to bring electricity to the village, and also explores how village women manage their household water needs through a combination of purchased, and well-drawn water. The data collection methods utilized include spot observation, site visits, semi-structured and unstructured interviews with key informants, and a survey of female heads of household to determine domestic water use patterns. The results suggest that, while deep borehole wells provide a fairly reliable source of water for villagers and reduce women’s labor burden, the cost of water is often prohibitive, and the majority of residents continue to regularly use open wells in addition to public taps. This suggests that Senegal’s management of rural water systems is still at an emerging stage, and would benefit from increased financial investment to maintain continuous access and expand the existing rural water provision network

Planning to cope with tropical and subtropical climate change

During the last decade many local governments have launched initiatives to reduce CO2 emissions and the potential impact of hydro climatic disasters. Nonetheless, today barely 11% of subtropical and tropical cities with over 100,000 inhabitants has a climate plan. Often this tool neither issues from an analysis of either climate change or hydro climatic risks, nor does it provide an adequate depth of detail for the identified measures (cost, funding mode, implementation), nor a sound monitoring-evaluation device. This book contributes to improve the quality of climate planning by providing 19 examples of analysis and assessments in eleven countries. It is intended for local operators in the fields of climate, hydro climatic risks, physical planning, besides researchers and students of these subjects. The first chapter describes the status of climate planning in large subtropical and tropical cities. The following six chapters discuss the hazards (atmospheric drought, intense precipitations, sea level rise, sea water intrusion) and early warning systems in various contexts. Nine chapters enlarge on flood risk analysis and preliminary mapping, climate change vulnerability, comparing contingency plans in various scales and presenting experiences centred on adaptation planning. The last three chapters introduce some best practices of weather and climate change monitoring, of flood risk mapping and assessment

Case studies for developing globally responsible engineers

Document realitzat amb un ajut financer de la Unió Europea. Per poder accedir al material complementari per a docents dels 28 casos estudi que formen el llibre, activeu el "Document relacionat"Col·lecció de 28 casos estudi per a professors d'enginyeria: 1. Rural development and planning in LDCs: the “Gamba Deve – Licoma axis”,district of Caia, Mozambique 2. Reducing the impact of soil erosion and reservoir siltation on agricultural production and water availability: the case study of the Laaba catchment (Burkina Faso) 3. Trade and Mobility on the Rooftop of the World: Gravity Ropeways in Nepal 4. Sustainable Development of Agriculture and Food systems with regard to Water 5. Conservation agriculture: a complex avenue to conserve and improve soils 6. The national rural water supply and sanitation programme in Tanzania 7. Use of statistical tools in a development context. Analysis of variance (ANOVA) 8. Water supply system in Kojani Island (Zanzibar, Tanzania) 9. Faecal sludge management in Lusaka, Zambia 10. Water balance on the Central Rift Valley 11. Rural electrification in developing countries via autonomous micro-grids 12. Photovoltaics electrification in off-grid areas 13. Development of a MILP model to design wind-photovoltaic stand-alone electrification projects for isolated communities in developing countries 14. Estimation if indoor air pollution and health impacts due to biomass burning in rural Northern Ghana 15.Improved cookstoves assessment 16. Supporting the adoption of clean cookstoves and fuels: why won’t people adopt the perfect stove? 17. Do-it-yourself approach as appropriate technology for solar thermal system: the example of CDF Médina, Dakar (Senegal) 18. Essential oil extraction with concentrating solar thermal energy 19. Survival in the desert sun: cool food storage 20. Energy roadmap in Ghana and Botswana 21. Social & ethical issues in engineering 22. Radio communications systems in rural environments 23. A Diffserv transport network to bring 3G access to villages in the Amazon forest 24. Finding the poynting’s theorem in a health centre in San Pablo (Peru) 25. Tanzania, Water and health 26. Flood assessment and warning system 27. Technical aspects of municipal solid waste collection: case studies from East Africa 28. Plastic recyclingPeer ReviewedPostprint (published version

The water resource in tropical Africa and its exploitation

Deals with water resource & its exploitation in tropical Africa from an engineering point of view, giving an insight into the wide range of problems in water development & providing general guidelines for future planning. Considers such issues as the mechanics of the hydrological cycle, the origins of wide variations in rainfall, the potential for water resources development in pastoral areas & low cost methods of exploiting these resources, & problems of water quality. Includes some recommendations on key areas which play an important role in the successful implementation & continued operation of schemes for water supply

The adaptation continuum: groundwork for the future

The focus of the program was to understand the challenges posed by climate change and climate variability on vulnerable groups and the policies needed to support climate adaptation in developing countries. The aim of the book is to share this experience in the hope that it will be helpful to those involved in shaping and implementing climate change policy

Remote Sensing of Precipitation: Part II

Precipitation is a well-recognized pillar in the global water and energy balances. The accurate and timely understanding of its characteristics at the global, regional and local scales is indispensable for a clearer insight on the mechanisms underlying the Earth’s atmosphere-ocean complex system. Precipitation is one of the elements that is documented to be greatly affected by climate change. In its various forms, precipitation comprises the primary source of freshwater, which is vital for the sustainability of almost all human activities. Its socio-economic significance is fundamental in managing this natural resource effectively, in applications ranging from irrigation to industrial and household usage. Remote sensing of precipitation is pursued through a broad spectrum of continuously enriched and upgraded instrumentation, embracing sensors which can be ground-based (e.g., weather radars), satellite-borne (e.g., passive or active space-borne sensors), underwater (e.g., hydrophones), aerial, or ship-borne. This volume hosts original research contributions on several aspects of remote sensing of precipitation, including applications which embrace the use of remote sensing in tackling issues such as precipitation estimation, seasonal characteristics of precipitation and frequency analysis, assessment of satellite precipitation products, storm prediction, rain microphysics and microstructure, and the comparison of satellite and numerical weather prediction precipitation products

Managing drought and water scarcity in vulnerable environments : proceedings of the 10th European Seminar on the Geography of Water : [June 26-July 6, 2006, Seville, Spain]

http://www.ester.ee/record=b2190566*es