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Salinity is one of the major problems in the coastal region of Bangladesh that contributes to 20% of the total land area. About 53% of the coastal region is affected by different degrees of salinity. Salinity intrusion in this area is mainly derived through climate change as well as anthropogenic factors that make this region more vulnerable. Hence, salinity intrusion has adverse effects on water, soils, agriculture, fisheries, ecosystem, and livelihoods of this region. To ensure the availability of food as well as drinking water, this chapter highlights how individual and community people have endeavored several adaptation measures to minimize salinity effects. Moreover, it further discloses governmental and other development organizations’ actions toward salinity to reduce its impacts.

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.

Irrigation facility has been identified by many researchers as one of the essential institutional factors in agriculture sector of any country, including India. Furthermore, its importance has also been admitted in the agro-productions in any provinces, districts and blocks. The equitable distribution of such facilities may lead to equitable distributions in the productivity of land for different crop productions. Under this milieu, this chapter intends to examine the trends in the different types of paddy production and irrigational facilities in the Paschim Medinipur District of West Bengal State in India and tries to correlate whether disparities in paddy production are associated with disparities in the distribution of irrigational facilities. The results show positive association between the two and prescribe inclusive arrangements of irrigational facilities to all the blocks in the district to have long-term solutions.

All over the world, Bangladesh is well known as a flood- and cyclone-affected country. But in the recent years the slow onset disaster of drought is more frequent in Bangladesh due to climatic as well as nonclimatic variability. As a consequence, agriculture along with its dependent farmers’ livelihoods tremendously experience its adverse impacts. Therefore, the main focus of this chapter is to discuss about drought, its effects on different sectors, and how in different levels a number of drought risk management actions are carried out to cope with this insidious disaster in the context of Bangladesh.

The southwest coastal region is part of an inactive delta of large Himalayan rivers and is protected from tidal surge by the Sundarbans mangrove forest. This area is the hub of all types of disasters such as cyclones, tidal surges, floods, drought, salinity intrusions, repeated waterlogging, and land subsidence. Cyclonic tidal surges and floods are the more common disasters, and their effects are frequently experienced at the local level. But silent and invisible disasters such as increased salinity, arsenic contamination, and drought affect local livelihoods, people, and environments in this region. The vulnerability of southwest region to increased salinity, arsenic contamination, and drought are the result of a complex interrelationship among biophysical, social, economical, and technological characteristics of the country. Moreover, in the current and foreseeable future, the country is likely to be affected by the biggest, most long-lasting, and global scale but silent disaster: increased salinity, natural arsenic contamination, and drought. Therefore, this region is thought to be the most disaster-prone region in Bangladesh because of natural disasters and highly vulnerable to the effects of climate change.

According to the Intergovernmental Panel on Climate Change (IPCC) special report on the regional impacts of Climate Change (IPCC, 2007a), a drastic change in rainfall patterns in the warmer climate would occur in Bangladesh, and it may experience a 5% to 6% increase of rainfall by 2030 due to glacier melting and more intense monsoons, which will create frequent large and prolonged floods as well as an increase in droughts outside the monsoon season. Furthermore, in the context of global warming, most of the climatic models project a decrease in precipitation in the dry season and an increase during the monsoon season in south Asia (Christensen et al., 2007). This will cause a combination of more extreme floods and droughts in this region. Therefore, the moderately drought-affected areas will be turned into severely drought-prone areas within next 20 to 30 years (IPCC, 2007b).

Millions of people in Southwestern Bangladesh drink groundwater that has arsenic contamination levels above both Bangladeshi and WHO standards. Thus, arsenic, the king of poisons, presents significant social problems in the rural communities of Bangladesh. Lacking arsenic-free drinking water, the local populations are most adversely affected. Arsenic contamination of drinking water and food is the main pathway by which arsenic enters people’s lives, producing diseases such as melanosis, keratosis, skin lesions, skin cancers, and kidney failure. Therefore, to cope with and alleviate arsenic poisoning, whatever adaptation and mitigation strategy is adopted, it should, however, start with and be led by the local community wherever possible for it is local villagers who are often the real experts on arsenic contamination. Rather than implementing highly technical, expensive, and outsider-led interventions that are often untried in field conditions, priority should be given to using modified traditional coping and mitigation mechanisms developed in the communities in Bangladesh. Hence, this chapter highlights first the extent of arsenic poisoning in the Southwestern part; its adverse impact on livelihood, water sector, and social aspect; and then the focus shifts to community-level mitigation strategy led by the people along with the assistance of GO and nongovernmental organization (NGO); and finally there is the conclusion along with recommendations.

Many people as well as the government in Bangladesh perceive floods and cyclones as recurrent environmental hazards in the country. They also view that these two hazards are the main contributors to crop loss in the country. But, in reality, droughts afflict the country at least as frequently as do major floods and cyclones, averaging about once in 2.5 years (Adnan, 1993, p. 1; Erickson, 1993, p. 5; Hossain 1990, p. 33). In some years, droughts not only cause a greater damage to crops than floods or cyclones, but they also generally affect more farmers across a wider area (Paul, 1995). If not institutionally and economically tackled, the consequences tend to have a far-reaching effect on the given society, and the socioeconomic problems would assume a chronic pattern.

The contamination of groundwater by natural arsenic is currently a worldwide epidemic. Arsenic-contaminated groundwater has been reported in Argentina, Chile, Mexico, China, Hungary, West Bengal in India, Bangladesh, and Vietnam. Of these regions, Bangladesh and West Bengal are the most seriously affected in terms of the size of the population at risk and magnitude of health problems. Hence, chronic exposure to arsenic >50′′μg/L in drinking water can result in serious health problems. Common symptoms of arsenic-related ailments are skin, cardiovascular, renal, hematological, and respiratory disorders. Therefore, this chapter focuses on nature, origin, and extent of groundwater arsenic contamination, probable causes, and its impacts on food, drinking water, and social coverage. It further discloses mitigation approaches proposed and practiced by the different research groups to combat this problem and finally concludes.

The northwestern region of Bangladesh has experienced drought more in recent years than earlier decades because of high rainfall variability accompanied by high temperature. As Bangladesh is an agro-based country, agriculture and its dependent farmers’ livelihood face substantial impacts. To cope with drought, farmers of this region performed various adaptation measures by their own efforts along with institutional support. But these efforts and support are not sufficient enough for them to endure drought. Therefore, this chapter discloses how to measure drought-affected areas and identify action-oriented drought-adaptive practices of farmers that will enhance drought risk management policy and actions in northwestern Bangladesh.