Water Insecurity: A Social Dilemma: Volume 13

Water quality and quantity will become the principal limiting factor for sustainable development in many countries across the world. “Everything living is created from water” is an ancient quotation, which closely describes the importance of water. Water insecurity is a social dilemma in the recent decades because of several factors. Moreover, the widespread presence of arsenic in groundwater, salinity in both surface and groundwater, and the insidious disaster of drought make the water insecure and the population faces water risk in their daily life. Safe drinking water as well as health problems is an issue of concern in many countries on all continents, particularly in Southeast and South Asia. Therefore, this chapter provides water insecurity issues in a broader viewpoint especially focusing on salinity, arsenic, and drought disaster that together enhance vulnerability of water sector.

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.

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.

Arsenic contamination in shallow groundwater aquifers in the lower Gangetic basin constitutes a major health hazard in the Bengal basin extended over Bangladesh and India. It has been estimated that at least 35 million people in Bangladesh and 6 million people in India are severely affected by arsenic-contaminated water. More so, about 57 and 9 million people in Bangladesh and West Bengal, respectively, are exposed to arsenic-contamination risk. The use of hazardous, arsenic-bearing groundwater for drinking, cooking, and irrigation in West Bengal and Bangladesh has led to what has been described by the WHO as the worst case of mass poisoning in human history. In case of West Bengal, the problem of arsenic contamination was discovered in the 1980s; since then several mitigation measures were adopted by the provincial and federal governments, community organizations, and NGOs. Yet, poor infrastructural arrangements, dire poverty, lack of awareness, and education increased the risk of arsenic exposure over the decades. In this chapter, an effort has been made to critically analyze the extent of mitigation measures adopted so far in the state of West Bengal. It discusses in detail the chronological responses of the provincial government in arsenic risk mitigation, implementation of adopted mitigation measures, and the consequent response and actions of arsenic-affected communities in West Bengal. The chapter also highlights the emerging challenges of arsenic risk mitigation in West Bengal and proposes a “system-based” framework for risk mitigation.

The Gangetic delta, sustaining the Sundarbans mangrove forest at the apex of the Bay of Bengal is recognized as one of the most diversified and productive ecosystems in the Indian subcontinent. The deltaic lobe is unique for its wilderness, mangrove gene pool and tiger habitat. However, due to intense industrial activities in the upstream zone, and several anthropogenic factors, the aquatic phase in the western part of the deltaic complex is exposed to pollution from domestic sewage and industrial effluents leading to serious impacts on biota. The presence of Haldia port-cum-industrial complex in the upstream region of the lower Gangetic delta (adjacent to western sector of Indian Sundarbans) has accelerated the pollution problem to a much greater dimension. The organic and inorganic wastes released from industries and urban units contain substantial concentrations of heavy metals. The present article aims to highlight the level of selective heavy metals (zinc, copper, and lead) in the water and muscle of a commercially important shellfish species (Penaeus monodon, commonly known as tiger prawn) collected from two sectors (western and central) in the Indian Sundarbans. Heavy metals are accumulated in the prawn muscle in the following order – zinc > copper > lead – which is similar to the order in the ambient estuarine water. Significant spatial variations of heavy metal concentrations in estuarine water and prawn muscle were observed between the selected sectors, which reflect the adverse impact of intense industrialization, unplanned tourism, and rapid urbanization on the mangrove ecosystem and its biotic community, particularly in the western Indian Sundarbans.

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.

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.

Mangroves constitute an important ecosystem because of their global extent and high productivity. These plants thrive in the intertidal zones of the tropics and subtropics that are characterized by regular tidal inundation and fluctuating salinity. Mangrove species are well adapted, both morphologically and physiologically, to survive under saline conditions, but in hypersaline environment their growth is reduced. The present chapter is a critical analysis on the impact of salinity on the growth of a common mangrove species (Hertiera fomes). The analysis has been carried out in the framework of Indian Sundarbans, which has contrasting salinity profiles in different segments owing to barrage discharge and siltation phenomena. Analysis of the decadal profile of salinity indicates a gradual lowering in the western Indian Sundarbans due to Farrakka barrage discharge and run-off from catchments. The central sector, however, exhibits a contrasting picture of increment of aquatic salinity through time, mainly due to disconnection of the Bidyadhari River with the Ganga–Bhagrirathi–Hooghly River system (in the western part). This has made the Matla River in the central Indian Sundarbans hypersaline in nature (that used to get water from the Bidyadhari River) finally leading to an insecure ecological condition for the growth and survival of mangroves. The possible remedial measures to combat the situation have also been listed considering the ecological framework of the study zone.

Over the last few years, impacts of environmental variability on population migration have been an increasing concern over the world. Estimates have suggested that between 25 million and 1 billion people could be displaced by climate change over the next 40 years. Though it is very difficult to delineate the specific drivers behind human migration, an attempt has been made in this chapter to discuss various reported cases across the world and more specifically, India where environment has played a major role in population movement. The chapter begins by outlining important definitions of migration and environmentally induced migration. It focuses on how environmental change and environmental hazards, especially water scarcity, contribute to human migration by exploring the mechanisms through which vulnerability and migration are linked. The process of movement and migration is usually subject to a complex set of push and pull forces, where push forces relate to the source area while pull factors relate to the destination. Emphasizing water scarcity as one of the prime push factors behind migration, various instances of population movement have been discussed from various parts of India. Understanding the importance of migration in development of a sustainable society, the chapter identifies various gaps that need to be addressed, which, in turn, will help in incorporating environment-induced migration into the decision-making process.

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 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.

Water insecurity is a big threat and a defining global challenge that causes social dilemma in the society. Analyzing all the previous chapters in this volume, this final chapter will discuss water use and its consequence of social dilemma, the key lessons and observations that trigger water insecurity, major challenges and success factors toward water insecurity, and how water insecurity can be minimized through the involvement of community people, and improvement of social stability in the form of common understanding. This chapter also emphasizes the linkage between local and national levels by the development of Integrated Water Resource Management both in quantity and quality aspects.