Review Article
Volume 1 Issue 2 - 2015
Water-A Limiting Resource for Sustainable Agriculture in Bangladesh
M A Hossain* and M N A Siddique#
Soil Resource Development Institute, Ministry of Agriculture, Bangladesh
*Corresponding Author: M A Hossain and M N A Siddique, Soil Resource Development Institute, Ministry of Agriculture, Dhaka, Bangladesh.
Received: February 05, 2015; Published: February 19, 2015
Citation: M A Hossain and M N A Siddique. “Water-A Limiting Resource for Sustainable Agriculture in Bangladesh”. EC Agriculture 1.2 (2015): 124-137.
Water is a limiting renewable resource and an important basic necessity for the human survival and agricultural activities on earth. The quantity of water resource on earth is limited. Its availability per person is reducing day by day due to increase in global population, demand for food, need of infrastructure and recurring damage to environment. Water has become a critical and scare resource during dry (Rabi) season for irrigated agriculture, domestic and other uses which is a serious threat to sustainable agricultural development in Bangladesh. Scarcity of water resources in optimum space and time depends on different hydrological and agro-climatic factors including human interventions. River course change, Excessive abstraction of ground water for agriculture by shallow and deep tube well, seasonal variability, shift of critical rainfall period, intensity of rains, higher water use cropping pattern and irrigation inefficiency for rice based farming are among key factors which govern the water resource utilization and degradation in Bangladesh. In addition, possible increase in temperature due to climate change will bring a radical change in the management of both surface and ground water resources. It is said that South Asia might experience a 30 percent drop in agricultural production by 2050. And if water becomes limiting the situation will aggravate further. As rice is dominating in the cropping pattern of Bangladesh significant increase in irrigation water use efficiency will lead to substantial saving of the precious resource which could be used for other crops, livestock and human domestic consumption. Appropriate water management practices, efficient irrigation techniques and low water consuming cropping patterns are needed for sustainable agricultural productivity in Bangladesh.
Keywords: Water; Seasonal variability; Water use; Irrigation; Groundwater and Agriculture
Changes in water resources in terms of quality and quantity are more likely due to human activities; while natural causes could also change water resources when one or more soil-water integrated process reinforced by human activities such as river course change or downstream water course regulated by trans-boundary authorities. Whatever the causes are but now-a-days water is considered as the changing resource of this planet, and it has significant role for agriculture and life on earth. Access to quality and or adequate water source is crucial humans. Schnoor reported that population growth and migration; climate change; changes in land use and energy choices; and global poverty are the four major factors which affect access to quality water [1]. These factors might cause less water and expose poor people to degraded water. Thus, we need to protect and improve available water sources and or ensure consistent supplies. To meet challenges associated with changing water environment, Schnoor further suggested that ‘we must recognize the causes of the problem and seek to mitigate them, adapt or change by altering the way we treat and use water, as engineers and scientists, we must provide appropriate, sustainable technology for water infrastructure and find better ways of monitoring, modeling and forecasting our water future to provide stakeholders and decision makers with better information’ [1].
Agriculture is a valuable sector which has manifold contribution in the world’s economy such as it contributes 24% of global Gross Domestic Product and provides employment to 1.3 billion people or 22% of the world's population [2]. While Subedi reported that agriculture is considered as significant priority sector to increase food production through purposive agricultural development programs in many of the developing countries [3]. Demand for higher agricultural productivity is ever increasing in the developing countries but a narrower or even none considerations for sustainability of this sector. Thus, conservation and preservation of basic natural resources has been threatened; and being a developing country, Bangladesh is not very far from there. Therefore, large areas of the world have faced sever soil degradation, water erosion, groundwater pollution and natural resource depletion [4,5,6]. Developing countries which are largely depending on agriculture and limited natural resources for food and infrastructure obviously moving towards resource scarcity and degradation [3]. Sustainable agriculture would be a potential solution for avoiding such degradation, and saving natural resources such as soil, water and environment instead of conventional approach in agriculture. Sustainable agriculture bears set values from ecological and social reality perspectives. MacRae noted that conventional agricultural practices are having negative impacts on soil, water and environmental quality [7]. Thus, present agriculture exerting pressure on resource availability and their use. While on the other hand, sustainable agriculture systems are designed to take maximum advantage of existing soil nutrient and water cycles. Existing cycles and water flows, environmental damage could be avoided by practicing sustainable agriculture [3].
Why do people need to exploit resources to their greatest extent, the answer is rather simple, ever increasing demand of food in developing countries. To meet the ever increasing demand of food, chemical fertilizer based conventional agriculture and intensive cultivation of rice has caused degradation of agricultural land in Bangladesh [8]. Rapid population growth and increasing demand of water for agriculture and livelihood has become a great challenge for Bangladesh. Availability of sufficient water at right time, especially during farming seasons, has become uncertain due to seasonal variation, climate change and upstream water cease due to trans-boundary issues from parts of Indian for water distribution in major rivers of Bangladesh. But from agricultural point of view, demand for water is increasing with the rising of population and their demands for food; as such rice production is increasing extensively in Bangladesh. This is how water scarcity problem in Bangladesh becomes worse, mainly due to expansion and diversification of agricultural crops while maintaining self-sufficiency in food grain production. In Bangladesh, rice covers major portion of agricultural production. Boro rice contributes a large share of rice production and that is exclusively depends on irrigation because it is a dry season cropping system [9]. Another contrasting feature of annual water cycle in Bangladesh dominates by excessive water during monsoon which cause flood but inadequate water during the dry seasons which cause drought like situation. These entire factors should be taken into consideration during planning for water resources development in Bangladesh to challenge water scarcity situations.
Seasonal variation is evident in Bangladesh. Irregular and unreliable rainfall, rabi crops in general suffer from moisture stress. Yield reductions are not because of drought only but also due to breakdown of irrigation facilities. Proper irrigation plays a vital role in crop production in the country and will be of more importance in the future, when the scarcity of fresh or irrigable water is feared to increase. Another complexity is the occurrence of a different types of soils and land types in Bangladesh. The soils vary conspicuously with respect to moisture holding capacities, infiltration rates and other soil-water related properties [10]. Therefore, more emphasis should be given to adapt cropping pattern which require less water and or establishing low water consuming agriculture would be key future challenges for Bangladesh. Sustainable water resource management, irrigation systems, cropping patterns based on seasonal water availability and climate change issues should be the basis for future rice cultivation strategy for Bangladesh. This paper examines current water resource use, seasonal availability, trend of irrigation demand, and abstraction of groundwater and highlighted means of efficient water use in agriculture which will lead to sustainable water use for agriculture in Bangladesh.
Materials and Methods
This paper is prepared by reviewing secondary data, reports, published papers in national and international journals and periodicals.
Hydro-ecological scenario of Bangladesh
Bangladesh has seven hydrological regions (Figure 1a). Agriculture is the major water-using economic sector while rice cultivation is the single most important food crop activity in the economy. Bangladesh is not known for its water scarcity problem, agricultural water scarcity mostly sees as a problem in the south-western and north western regions during the winter dry periods [11]. But availability of rainfall and irrigation water source is crucial during growing seasons where water scarcity could be considered as a problem due to combination of many agro-climatic and hydro-ecological reasons. However, the crop calendar of Bangladesh patterns itself on the temporal distribution of rainfall and temperature throughout the year. There are three primary cropping seasons: pre-monsoon, monsoon and winter (dry season). Aus is the pre-monsoon rice variety, Aman the rain-fed monsoon (wet season) rice variety and Boro (irrigated) the dry season rice variety. Boro is the leading rice crop contributing about 55 percent of the total rice production followed by Aman at 40 percent and Aus at 5 percent [12]. A remarkable feature of the rice growth pattern is the rising share and or requirement of irrigated high yielding variety (HYV) Boro rice. The other major crops are wheat, jute, sugarcane, oilseeds, pulses, potato, onion, spices and vegetables.
Rainfall characteristics dominate the precipitation pattern of Bangladesh; with rainfall dependent largely on the presence and the duration of the monsoon. The average annual rainfall varies from 1,200 mm in the extreme west to over 5,000 mm in the northeast. Meteorologists have identified four seasons on the basis of rainfall patterns. About 80 percent of the total rainfall occurs during the monsoons from June to September. Only 10 percent of the annual rainfall is available during the combined post-monsoon (October-November) and winter (December-February) periods. The rainfall is extremely unreliable in the subsequent pre-monsoon (March-May) period as well, which receives on average only 10 percent of the annual rainfall [13]. Water shortage is regional as well as seasonal. Water is therefore very scarce in the southwest and northwest regions of Bangladesh during winter (December-February). The southwest region of Bangladesh, which has an inland zone and a coastal zone, is the Ganges-dependent region, which suffers from both dry season water shortage and arsenic contamination. In the coastal zone, the most shallow groundwater sources are saline while surface water salinity is also widespread. It also suffers from drainage congestion, salinity intrusion and high cyclone risks while also being the worst affected by arsenic contamination of groundwater. Drought intensity plays a crucial role for agricultural productivity in physiographic areas such as Piedmont regions, level and high Barind Tracts areas and Madhupur Tract areas during winter season. While agricultural activity in greater Flood Plain is also dependent on water supply especially for dry season Boro rice cultivation during winter period. Drought intensity in Kharif (March-June) and Rabi (October-February) season of Bangladesh is widespread over the country (Figure 2).
In inland areas, over time, the use of shallow tube wells (STW) for irrigation purposes has intensified for agriculture as shown in Figure 3 [14] status of DTW, STW and LLP. Furthermore, Kundu also reported that increased no of STW was found in Rajshahi division followed by Dhaka and Khulna division but very poor in Barisal division, as in Chittagong division the use of LLP is higher [14]. Thus, excessive withdrawn of water from these area causing lowering of the static water level creating a negative impact on the environment throughout the country. The northwest region, on the other hand, is highly developed agriculturally and has the largest irrigated area of all regions supplied mainly by shallow tube wells. Due to STW irrigation, seasonal water table decline is widespread [15]. The southern part of this region is however flood-prone. Therefore, it is home to some of the country’s biggest flood control drainage and irrigation schemes. The north central region is the most industrialized and urbanized region of the country, which includes the capital city (Dhaka). This region too suffers from seasonal water table decline problems due to intensive STW irrigation. In the eastern hills, irrigation is mainly by low lift pumps (LLP) since shallow tube well irrigation is limited due to groundwater salinity. The dry season flow also limits irrigation water availability.
Figure 1: (a) Hydrological Regions; and (b) Mean annual rainfall of Bangladesh [11].

Figure 2: Drought intensity in Khraif (March-May) and Rabi (November-February) season.
The south central region does not have the same dry season water shortage problem as the southwest region. But it is much more vulnerable to cyclones and storm surges in the coastal zone while also being prone to serious arsenic problems. Only the less saline area resorts to irrigation. Both LLP and STW are in use for irrigation. Because of the aquifer arsenic problems, the northeast region has relatively little exploitable shallow groundwater but has more abundant dry season surface water resources. Irrigation mostly depends therefore on low lift pumps than shallow tube wells [15].
Figure 3: Percentage use of DTW, STW, LLP in whole Bangladesh [14].
Ground water levels and abstraction in Bangladesh
Seasonal variations mostly associated with monsoon rainfall govern groundwater levels charge or discharge in shallow aquifers underlying Ganges-Brahmaputra-Meghna delta. Shamsudduha et al., used a nonparametric seasonal-trend decomposition procedure (STL) to observe trend and seasonal components associated with groundwater levels (Figure 4b) [16]. This study observed variation in groundwater levels but detected decline of ground water levels (> 1 m/yr) areas around capital Dhaka as well as in north-central, north-western and south-western parts of the country (0.1-0.5 m/yr) due to intensive abstraction of groundwater during dry season rice cultivation. Furthermore, this study revealed that unsustainable irrigation supplied by shallow aquifers in some areas such as High Barind Tract; on the other hand sea water intrusion of coastal aquifers causing hydrological impact that might lead to sea-level rise. However, groundwater-fed irrigation for dry season rice cultivation during years 1979 to 2003 increased by approx. 875 million cubic meters each year as recorded by BADC, 2003 (Figure 4a). Thus, annual rice production elevated from 11.9 megatonnes (1975) to 27.3 megatonnes in 2006-2007 [12]. Enough record of groundwater irrigation is not available in the country; still Shamsudduha et al., provide an approximation of the spatial distribution of groundwater abstraction as percentage of lands in every districts of the country that was irrigated by shallow and deep irrigation pumps in 2003 (Figure 4a) [16]. Nationally, a total of 924 023 STWs were used to irrigate about 24094 km2 of agricultural land accounting for approximately 60% of irrigated land whereas irrigation using DTWs comprised 15%. Analysis of Shamsudduha et al., indicate that areas of intensive abstraction for irrigation exhibit declining trends in long-term groundwater levels in Bangladesh [16]. Jaitly reported that in Bangladesh area irrigated by wells expanded from 4% in 1972 to 70% in 1999 and groundwater accounts for the larger part of additional irrigated area [17]. Groundwater irrigated area in relation to country’s total area, total cultivated area and country’s total irrigated area were 18%, 30% and 69% respectively (Table 1), and these values are higher compared to countries such as India, Pakistan etc. Thus, severity of ground water extraction should be accounted governmental legal frameworks unless it might impact on the quality and quantity of fresh water in Bangladesh.
Figure 4: (a) Percentage of land in each of the 64 districts in Bangladesh irrigated with groundwater in 2003 [18]. Total numbers of shallow and deep tube well operated in each district in 2003 are also shown. Low-permeable regionally extensive surface geological units are shown in the background. (b) Median groundwater levels for September (end of monsoon season) over a period of 21 years. Groundwater levels are referenced to the mean sea level (msl) [16].
Country Total Hectares Underground Irrigation Groundwater Irrigated Area As Share (%) Of
Global Groundwater Irrigated Area Country’s Total Area Country’s Total Cultivated Area Country’s Total Irrigated Area
India 26,538,000 38.6 8.1 15.6 53.0
Pakistan 4,871,000 7.1 6.1 22.0 30.8
Bangladesh 2,592,000 3.8 18.0 30.8 69.1
Afghanistan 36,0007 0.5 0.6 4.6 11.5
Table 1: Groundwater irrigation in south Asian countries [17].
Water scarcity in Bangladesh
Water scarcity for agricultural use in Bangladesh is both seasonal and region-specific. Water is most scarce in the south-western and north-western regions of the country during the dry season due to low annual rainfall. The annual mean rainfall has been increasing and flooding is occurring once in every 4 to 5 years in the country [19] but intensity and incidence of rainfall for dry season crop is not optimum. Winter months, i.e., November to March, are very dry in Bangladesh due to low rainfall whereas about 95% of annual rainfall occurs during April to October. The annual renewable water of Bangladesh from all sources is 1211 cubic kilometer and out of this about 21 cubic kilometer from groundwater [20]. Annual irrigation water requirement in the country is about 19 cubic kilometres [20]. Water withdrawal is 76 cubic kilometer that is only 6 percent renewable water is being withdrawn for agriculture. Both surface water and groundwater are used for irrigation where 80 percent of total irrigated area (4,787,000 hectare) is under groundwater irrigation. Irrigation water is considered as an important input for increased land productivity. Area irrigated by power pump (LLP) and tube well has been increasing sharply since 2003 covering about 58% cropped area [12].
Rice based cropping pattern and irrigation scenario
Irrigation is a prerequisite for agricultural cultivation during the dry season. Boro the dry season rice covers most of the rice production in Bangladesh (Table 2). The development of irrigation infrastructure has contributed to the expansion of Boro rice areas. It requires more water in the production process than either wheat or potato. According to an estimate by Biswas and Mandal, water requirements are 11,500m3 per hectare (ha) of Boro rice. An estimated 3,000 to 5,000 litres of water is required to produce one kilogram of rice [21].
Water scarcity for agriculture and Irrigation
Due to changes in rainfall pattern and shortage of rainfall during monsoon may cause delay of transplantation of Aman rice in Khraif season while in Rabi season (Dry periods) rainfall sometimes insufficient for rainfed agriculture. Furthermore, erratic rainfall may create drought conditions during the pre-Kharif period (Figure 2). Thus, irrigation is required to sustain agricultural productivity but irrigation during Rabi and pre-Kharif periods would provide increasing constraints on the available ground and surface water. This has become gradually a critical issue in Bangladesh in terms of water management as agriculture of the country has become more and more dependent on the paddy production requiring intensive irrigation in the dry season. Water demand has increased for agriculture in drought prone areas but there exist reduced water availability due to many reasons. River channel bed siltation, upstream use and regulation, deforestation and climate change are causing reduced river flow in dry periods in Bangladesh. While on the other hand, as river flow reduced salt water intrusion has become another problem. Ground water table is declining due to over extraction of water for irrigation. In addition, salinization of aquifers is occurring in coastal zones because of lowering of ground water tables. Bangladesh is considered as land of rivers but in the last few decades, the flow in many rivers has been declining (Figure 5). For example, during the early 1970s, the Old Brahmaputra and Old Dhaleswari were sharing about 10% of the Jamuna flow, which reduced to 4% in recent years. Most importantly these perennial distributaries have now become seasonal distributaries, causing an acute shortage of water during the dry season [22].
Figure 5: Variation in flow of the Old Brahmaputra, Dhaleswari and Gorai over time [22].
Rainfall variability, weather and water Scarcity
Global community has recognized Bangladesh as one of the most vulnerable countries to rainfall variability, and as a hotspot for future impacts of climate change [23,24]. Seasonal variation plays significant role for the variability in rainfall, weather and climate. Seasons that can be recognized from climatic aspects are dry winter season from December to February, pre-monsoon hot summer season from March to May, rainy monsoon season from June to September and post-monsoon autumn season which lasts from October to November [25]. Variability of rainfall in space and time in different seasons is one of the key features of the climate but it is an important natural factor which determines agricultural production in Bangladesh. Mean monthly rainfall of Bangladesh is shown in Figure 6. Rainfall variability featuring extreme high and low precipitation is crucial for agricultural productivity and water availability. Not only in Bangladesh but due to climate change rainfall is changing globally [26,27,28] and regionally [29,30] which is an establish opinion. The implications of these changes are particularly significant in agriculture of Bangladesh where hydrological disasters are common [31]. Drought in north-western part of the country has become a common feature [32,31]. Organization for Economic Co-operation and Development (2003) reported water resources as the greatest concern due to climate change. However, case study from Kurigram district in the northwest part of Bangladesh revealed that the study area has been experiencing a gradual decrease in monsoon rainfall, along with changes in microstructure of rainfall patterns. Monsoon has been showing a shift from more steady rains with a single peak of the absolute amount to a bimodal distribution of rainfall with a significant dry period in between. The rainfall episode that occurs in October is apparently weakening. Since rainfall plays a significant role in agriculture and livelihoods of people, such changes disturb the seasonal production cycle and threaten livelihood and food security [33,34,35]. Basak reported that Variability in the amount and distribution of rainfall is one of the most important factors for limiting yield of rainfed crop like T.Aman rice in Bangladesh (Figure 6) [36]. Changing pattern of rainfall in T. Aman growing (June to October) has been assessed through analysis of data on rainfall for the period 1972-2008 for 12 major rice growing locations. The Continuous Rainless Days (CRDs) and Total Rainless Days (TRDs) are considered as those occurring between one or more consecutive rainy days yielding below 3.00mm rainfall. CRDs and TRDs both increased in 37 years for all rice growing locations and the significant change has been found for the months of July, August and October for CRDs and July, August and September for TRDs. Similar result has also been found for TRDs for different spells which are considered in this study. Some regional variation of CRDs and TRDs has been observed, with higher somewhat probability level calculated for North-western region in Bangladesh. This changing pattern of CRDs and TRDs may have a considerable negative effect on T. Aman cultivation in future which can be minimized by providing supplemental irrigation during this period to get better yield.
Figure 6: Monthly distribution of rainfall pattern in Bangladesh [9].
Water-saving technology developed by IRRI
Research at IRRI (International Rice Research Institute) has proven that using Alternate ‘Wetting and Drying (AWD)’ technique in Boro rice, about 15-30%, if not more, water could be saved without significant reduction in yield. Starting from about 15 days after transplanting, plot is to be irrigated until the water table goes 20cm below the ground level. Then a 20cm deep hole is dug in the rice field and a perforated plastic pipe is installed to monitor the level of the water table after each irrigation. This practice is to be continued until flowering starts. The plot should have 2-4cm standing water from flowering to dough stage. AWD water saving technique now being validated in Bangladesh by BRRI (Bangladesh Rice Research Institute), BADC (Bangladesh Agriculture Development Cooperation), BMDA (Barind Multipurpose Development Authority) and other partners. The savings of irrigation water will have positive impact on environment because of reduced withdrawal of ground water and reduction in burning diesel [37].
Low water consuming cropping pattern for sustainable agriculture
Bangladeshi farmers are more efficient in their use of land, labour, fertilizer and ploughing with power tiller than in their use of irrigation water. Moreover, medium high land farmers are more efficient compared to the highland and very lowland farmers when it terms of irrigation water use. In general Boro rice production requires three times more water than wheat or maize due to seepage and percolation in addition to evapo-transpiration for normal crop production. The scientists at BRRI also found that farmers use more water than required as demonstrated from the experimental plots [38]. Moreover, while there is a certain requirement of irrigation water for boro rice production, overuse will destroy the rice plants although water use below that level would result in less or no output per ha. The water requirement for irrigation also varies with soil moisture, temperature, annual rainfall and the Boro rice variety. For dry land crops if farmers apply irrigation after calculating how much available water is stored in the soil it will also contribute to water saving. Moreover low water consuming cropping pattern should be adopted in different Agro-ecological Regions of Bangladesh (Table 2).
No. Agro-Ecological Region Dominant Land Type Low Water Consuming Cropping Pattern Total Water Use (Mm)
1 Old Himalayan Piedmont Plain Highland
Medium Highland
Wheat-T. Aus-Fallow
Wheat-T. Aus-T. Aman
2 Active Tista Floodplain Medium Highland Wheat-T. Aus-T. Aman 1,390
3 Tista Meander Floodplain Highland
Medium Highland
Wheat-T. Aus-Fallow
Wheat-T. Aus-T. Aman
4 Karatoya-Bangali Floodplain Medium Highland Wheat-B. Aus-T. Aman 740
5 Lower Atrai Basin Lowland Boro-Fallow-Fallow 1,200
6 Lower Purnabhaba Floodplain Lowland Boro-Fallow-Fallow 1,200
7 Active Brahmaputra-Jamuna Floodplain Medium Lowland Boro-Fallow-Fallow 1,200
8 Young Brahmaputra and Jamuna Floodplain Medium Highland Potato-T. Aus-Fallow
Blackgram/Boro-T. Aus-Fallow
9 Old Brahmapura Floodplain Medium Highland Boro-Fallow-T. Aman 1,500
10 Active Ganges Floodplain Medium Highland Blackgram/Wheat-B. Aus-Fallow 350
11 High Ganges River Floodplain Highland
Medium Highland
Wheat-T. Aus-Fallow
Wheat-T. Aus-T. Aman
12 Low Ganges River Floodplain Medium Highland Pulses(Chickpea/Grasspea)-B. Aus-T. Aman 1,060
13 Ganges Tidal Floodplain Medium Highland Onion/Water melon/Mungbean/Cow pea/Chilli-Fallow-T. Aman 400-600
14 Gopalgonj-Khulna Bils Medium Lowland Boro-Fallow-Fallow 1,200
15 Arial Bil Lowland Boro-Fallow-Fallow 1,200
16 Middle Meghna River Floodplain Medium Lowland Boro(Local)-Fallow-Fallow 1,000
17 Lower Meghna River Floodplain Medium Highland
Medium Lowland
Boro-T. Aus-T. Aman
Boro-Fallow-T. Aman
18 Young Meghna Estuarine Floodplain Medium Highland Boro-Fallow-T. Aman (LIV) 1,200
19 Old Meghna Estuarine Floodplain Medium Lowland Boro-Fallow-T. Aman 1,500
20 Eastern Surma-Kushiyara Floodplain Lowland Boro-T. Aus (LIV)-T. Aman 2,200
21 Sylhet Basin Medium Lowland Boro-Fallow-Fallow 1,200
22 Northern and Eastern Piedmont Plain - - -
23 Chittagong Coastal Plain Medium Highland Fallow-T. Aus-T. Aman 1,050
24 St. Martin Coral Island - - -
25 Level Barind Tract Medium Highland Boro-Fallow-T. Aman 1,500
26 High Barind Tract Highland Boro-Fallow-T. Aman 1,500
27 Northern-Eastern Barind Tract Medium Highland Boro-Fallow-T. Aman 1,500
28 Madhupur Tract Medium Highland Boro-Fallow-T. Aman 1,500
29 Northern and Eastern Hills Highland Vegetables-T. Aus-T. Aman 1,350
30 Akhaura Terrace - - -
Table 2: Low water consuming cropping patterns for different agro-ecological regions of Bangladesh [38].
Water use for livelihood, agriculture, industry and infrastructure has increased during last few decades in Bangladesh. Above all, due to increase in population, per capita availability of water is declining. Water resources have become vulnerable and inadequate for agriculture. Water availability is not optimum as and when required for irrigation to its efficient utilization. There are many agro-climatic variables which governs water resource in Bangladesh such as water conflicts, groundwater extraction, irrigation based rice farming, and inadequate water flow in rivers during dry and off seasons, variability in rainfall events and inefficient irrigation. The cumulative effects of these factors have led to water scarcity situations of varying extent for agriculture of Bangladesh; especially for dry season crops and irrigation based rice farming during Boro Season. How to relieve the worsening water crisis has become a major common-concerned strategic issue from agricultural perspectives in the 21st century for Bangladesh. Agricultural industry and or practices of Bangladesh require to be shaped into water saving technologies, and adoption off efficient water use will greatly contribute towards ensuring food security and water resource balancing in Bangladesh. Thus, developing innovative practices to save and optimize water use for agriculture will be significant strategic measure and challenge to ensure future food, water and ecological security in Bangladesh. Research emphasis and development of modern water-saving agricultural technology, low water consuming cropping pattern and efficiency in irrigation in the critical period and or dry cultivation period is required, and need to be implemented without delay to ensure strategic water and fresh water balance. Furthermore, there is also need for adoption of technologies during irrigation, training and education of farmers about the role of efficient water use in promoting and sustaining agricultural productivity without depleting water resource base. Government should explore ways to increase the participation of farmers in promoting and implementing programs related to sustainable water use during irrigation in dry season rice cultivation. This could speed up the adoption of new water saving methods of sustainable agriculture and facilitate the exchange of ideas among various stakeholders.
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Copyright: © 2015 M A Hossain., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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