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The Indus, Mekong, and Ganges River deltas, which have created one of the world’s largest delta and submarine fan system, currently contribute a major fraction of freshwater to East and South Asia. All these deltas are those regions in the world that face major challenges in their water sector due to population growth, urbanization, industrialization, sea-level rise, and salinity intrusion into inland and water bodies, all aggravated by climate change. Among them, salinity intrusion is currently one of the key issues that directly and indirectly cause water insecurity in East and South Asia, which ultimately hamper livelihood, agricultural production, and social interference. Hence, this chapter gives a comprehensive description on the nature and extent of the salinity problem, its adverse effects on livelihood and water sector, and then the focus goes to current and future sustainable water resource management within the delta to finally move on to conclusion and suggestions.

In late 2015, the El Nĩno phenomenon induced Vietnam’s worst drought in 60 years, which lasted until mid-2016 and intensified the most expansive saline intrusion in 90 years. The combination of the two hazards resulted in a large-scale disaster, which has led 18 provinces of Vietnam, most of them from the Mekong Delta, to water shortage, insanitation, human and animal diseases, food emergency need and a considerable disruption in local communities’ livelihoods. These devastating effects raise the question of what makes local households vulnerable to drought and saline intrusion. The chapter argues that vulnerability to the natural disaster is not something resulted from external threats, but rather, is derived from the interplay between social structures residing deeply inside the socio-economic systems and agency’s conditions presenting at the household level. Social structures are rules and procedures that constrain and/or enable human actions in agricultural production, risk taking and adaptation. Agency refers to the capacities of disaster-affected households in the Vietnamese Mekong Delta who cultivated third rice crop and suffered heavily from the 2015–2016 disaster. In addition to households’ lack of planning and coping capacities, the constitution of vulnerability to drought and saline intrusion can be attributed to the interaction between farmers’ choice of extra rice crops and the state’s policies and directions in agricultural and irrigation development since 1990s to date.

The effects of environmental change are becoming more noticeable in the Lower Mekong Basin, where there is growing pressure on the agriculture-based livelihoods of communities living along the mainstream of the Mekong River. This chapter presents an investigation of temporal seasonal variability in four communities of Kratie Province, Cambodia, including identification of locally developed strategies to adapt to temporal changes in weather patterns. A mixed-methods approach was adopted, combining historical hydrometeorological data with participatory seasonal calendars and daily routine diaries. Seasonal calendars were compiled from nine workshops across four villages in Kratie Province, and daily diaries were collected from seven individuals across three villages. The results indicate that patterns in rainfall, flooding and drought have become more variable due to the impacts of environmental change; a phenomenon that will likely continue into the future. Without effective, locally appropriate adaptation measures, changing weather patterns will likely continue to have adverse impacts on communities in the region due to their reliance on reliable seasonal rainfall and flooding events for crop cultivation. Households and communities in the study region have already developed a number of approaches to mitigate the adverse impacts of environmental change. This research also reiterated the importance of incorporating both local knowledge and scientific data to gain the most accurate understanding of the impacts of environmental change in a given region.

Over the last decades, there has been an increasing interest among scientists on the linkage between population health and climate and environmental factors, as well as health impacts of climate change and climate variability. Numerous studies have been done and substantial results achieved, but mostly in the developed countries, and not much quantitative evidence or assessment of the impacts at national and local levels has been provided for developing countries.

Vietnam is located in the tropical monsoon area, one of five storm hubs of Pacific Asia, and is regularly faced with various disasters. Drought, a normal part of the climate for virtually all regions of Vietnam, is of particular concern, where an interruption of the country already limited water supplies for extended periods of time can produce devastating impacts. Historical records indicate that drought occurs almost everywhere in those places almost every year (Hieu, 2002). However, multiyear droughts are of great concern to water-resource managers, natural-resource managers, and policy makers (Nguyen, 2010b).

The Ba River catchment and delta on the island of Viti Levu, Fiji, supports a wealth of livelihoods and is populated by diverse communities who are living with an increased frequency and intensity of hydro-meteorological hazards (floods, cyclones and droughts). Participatory mapping as part of focus group discussions is a tool that can be used to elucidate communities’ understanding of the differing impacts of multiple hazards, as well as the strategies used to prepare and respond to different hazards. In this chapter, the authors present the results of qualitative research undertaken with members of three communities along the Ba River, from the Nausori highlands to the coastal mangroves, with a particular focus on recent floods (2009, 2012) and Tropical Cyclone Winston (2016). The communities draw on a wide range of livelihood strategies from fishing and agriculture to tourism and outside work. Natural hazard events vary in their impact on these livelihood strategies across the landscape and seascape, so that community members can adjust their activities accordingly. The temporal ‘signatures’ of ongoing impacts are also variable across communities and resources. The results suggest that taking a broad, landscape (and seascape) approach to understanding how communities draw livelihoods is valuable in informing effective and inclusive adaptation strategies for environmental change. Furthermore, documenting how the landscape is used in a mapped output may be a valuable tool for future social impact assessment for resource extraction activities.

Vietnam is a stretch of land strengthening along Indochinese peninsula, which is located in Southeast Asia. Vietnam's mainland stretches from 23023′ to 08002′ north latitude and widens from 102008′ to 109028′ east longitude. Length counted in straight line from north to south stays at about 1,650km, width from west to east maximizes at 600km and minimizes at 50km. Entire territory of Vietnam includes 331,112km² of mainland and 1 million square kilometers of territorial sea. Currently, Vietnam enjoys 63 provinces, central cities with 622 administrative units of districts and cities and 10,511 administrative units of communes and wards.

This chapter investigates whether, and if so, how particular firms in a transition economy are involved in bribery. Built on pressure theories, we explain how the direct effects of firm characteristics and contextual characteristics determine firm bribery behavior. Entrepreneurs make choices based on perceptions of a specific pressure due to organizational characteristics (internal pressures) or due to context (external pressures). The relationship between firm characteristics, context, and bribery was estimated using unique data from a survey of 606 Vietnamese entrepreneurs. We controlled for various entrepreneurial, organizational, and industrial characteristics. The exploratory findings support firm attributes hypotheses, which is a negative relationship between firm size and bribery and a nonmonotonic U-shaped relationship between firm age and bribery. Besides, the effects of context on bribery are also found. Specifically, the result supports a positive relationship between competition and bribery and a negative relationship between the quality of the government and bribery.

This chapter analyzes characteristics and changing patterns of marriage formation in Vietnam over the past 50 years, from various aspects including the motives underpinning marriage decision-making, the process of mate acquaintance, the criteria for mate selection, and marriage decision-making rights. The chapter is based on a review of data derived from the Vietnam Family Survey 2006 (MOCST et al., 2008) and the Vietnam Marriage Survey 2017 (Minh, 2021). It shows that the pattern of marriage formation in Vietnam has changed significantly in the past decades under the influence of various socio-economic and legal factors. Marriage is increasingly associated with the value of personal happiness. People today have many more opportunities to meet and get to know each other before marriage than older generations in the past. Adolescents spend more time getting to know their future spouse and have more options when choosing future partners before marriage. Marriage based on a partner’s individual qualities is preferred, gradually replacing mate selection based on family background. Parents’ power over their children’s marriage has decreased, while young people are becoming more and more independent in making decisions about their lives. In other words, today, it is the interests of the people involved in the marriage that matters, not only the interests of the family and kinship that determines marriages. However, despite these new marriage formation patterns, the belief that children’s marriage is an important affair for the whole family is still maintained. The general pattern is that there is a mix of personal factors and family circumstances regarding the marriage choices.