Bangladesh Studies
Bangladesh Studies
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  • Bangladesh
    • Foreword
    • Acknowledgements
    • Preface
  • Country Profile
    • Country
    • Geography
    • Society
    • Economy
    • Transportation and Communications
    • Government and Politics
    • National Security
  • Introduction
    • bangladesh studies>
      • Chapter 1 - Historical Setting >
        • EARLY HISTORY, 1000 B.C.-A.D. 1202
        • Islamization of Bengal, 1202-1757
        • European Colonization, 1757-1857>
          • Early Settlements
          • The British Raj
        • Pakistan Period , 1947-71>
          • Transition to Nationhood, 1947-58
          • The "Revolution" of Ayub Khan, 1958-66
          • Emerging Discontent, 1966-70
          • The War for Bangladeshi Independence, 1971
        • Birth of Bangladesh>
          • Early Independence Period, 1971-72
          • Fall of the Bangabandhu, 1972-75
          • Restoration of Military Rule, 1975-77
          • The Zia Regime and Its Aftermath, 1977-82
      • Chapter 2 - The Society and Its Environment>
        • Geography>
          • The Land
          • Climate
          • River Systems
        • Population>
          • Population Structure and Settlement Patterns
          • Migration
          • Population Control
        • Social System >
          • Transition to a New Social Order
          • Rural Society
          • Urban Society
          • Women's Role in Society
          • Social Classes and Stratification
        • Religion>
          • Islam
          • Hinduism
          • Buddhism
          • Christianity
        • Education>
          • The British Legacy
          • Education System
          • Religious Education
          • Education Planning and Policy
        • Health>
          • Disease and Disease Control
          • Health Care Facilities
          • Medical Education and Training
      • Chapter 3. The Economy>
        • Economic Context >
          • Historical Perspective
          • Economic Reconstruction after Independence
        • Managing the Economy>
          • Economic Policy and Planning
          • Government Budget Process>
            • Revenue Budget
            • Development Budget
        • Joint Ventures and Foreign Investment
        • Money and Banking>
          • Currency Fluctuation
          • The Banking System
        • Foreign Assistance >
          • Test Case for Development
          • Aid Dependence>
            • International Banks
            • United Nations
            • Foreign Governments and Private Donors
        • Agriculture>
          • Structure of Agricultural Production
          • Food Crops
          • Industrial Crops
        • Industry>
          • Traditional Sectors
          • Ready-made Garments
          • Other Industries
          • Mineral Development
          • Technological Advances
        • Foreign Trade >
          • Export Sectors
          • Balance and Terms of Trade
        • Transportation and Communications>
          • Inland Waterways and Ports
          • Road Transportation
          • Railroads
          • Civil Aviation
          • Telecommunications
          • Tourism
        • Problems and Prospects
      • Chapter 4 - Government and Politics>
        • Structure of Government>
          • Constitution
          • Legislature
          • Executive>
            • Presidency
            • Council of Ministers
          • Judiciary
          • Civil Service
          • Local Administration
        • The Ershad Period>
          • Achieving Stability, 1982-83
          • Emerging Opposition, 1983-86
          • Relaxation of Martial Law, 1986-87
          • More Opposition Pressure
        • Political Dynamics >
          • Local Elites
          • The National Party
          • Party Politics>
            • Awami League
            • Bangladesh National Party
            • Islamic Parties
            • Alliances
            • Workers and Students
            • Women in Politics
        • The Media
        • Foreign Policy >
          • South and Southeast Asia>
            • India
            • Pakistan
            • Other Nations
          • China and Other Asian Nations
          • The Islamic World
          • The Superpowers>
            • United States
            • Soviet Union
          • Western Europe, Canada, Australia, and New Zealand
          • International Organizations
      • Chapter 5 - National Security>
        • Armed Forces and Society>
          • Colonial Origins
          • Pakistan Era
          • The Liberation War
          • Postindependence Period
        • Organization of the Armed Forces>
          • Legal Basis
          • Recruitment
          • Mission>
            • National Defense
            • Intelligence and Security
          • Security Environment
          • Defense Spending
          • Foreign Acquisitions and Ties
        • The Three Services>
          • Army
          • Navy
          • Air Force
        • Auxiliary Forces >
          • Bangladesh Rifles
          • Ansars
          • Police
          • Village Defence Party
        • Public Order and Internal Security>
          • Violence and Crime
          • Insurgency in the Chittagong Hills
          • Criminal Justice
          • The Military in the Late 1980's
  • Bibliography
  • Glossary
  • About us
  • Contract us
River Systems

Figure 4: Flood and Cyclone Vulnerability, 1960-80

Source: Based on information from M. Aminul Islam, et at. (eds.), Bangladesh in Maps, Dhaka, 1981, 14, 17.

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Figure 5: Topography and Drainage, 1988

The rivers of Bangladesh mark both the physiography of the nation and the life of the people. About 700 in number, these rivers generally flow south. The larger rivers serve as the main source of water for cultivation and as the principal arteries of commercial transportation. Rivers also provide fish, an important source of protein. Flooding of the rivers during the monsoon season causes enormous hardship and hinders development, but fresh deposits of rich silt replenish the fertile but overworked soil. The rivers also drain excess monsoon rainfall into the Bay of Bengal. Thus, the great river system is at the same time the country's principal resource and its greatest hazard.

The profusion of rivers can be divided into five major networks (see fig. 5). The Jamuna-Brahmaputra is 292 kilometers long and extends from northern Bangladesh to its confluence with the Padma. Originating as the Yarlung Zangbo Jiang in China's Xizang Autonomous Region (Tibet) and flowing through India's state of Arunachal Pradesh, where it becomes known as the Brahmaputra ("Son of Brahma"), it receives waters from five major tributaries that total some 740 kilometers in length. At the point where the Brahmaputra meets the Tista River in Bangladesh, it becomes known as the Jamuna. The Jamuna is notorious for its shifting subchannels and for the formation of fertile silt islands (chars). No permanent settlements can exist along its banks.

The second system is the Padma-Ganges, which is divided into two sections: a 258-kilometer segment, the Ganges, which extends from the western border with India to its confluence with the Jamuna some 72 kilometers west of Dhaka, and a 126-kilometer segment, the Padma, which runs from the Ganges-Jamuna confluence to where it joins the Meghna River at Chandpur. The Padma-Ganges is the central part of a deltaic river system with hundreds of rivers and streams--some 2,100 kilometers in length--flowing generally east or west into the Padma.

The third network is the Surma-Meghna system, which courses from the northeastern border with India to Chandpur, where it joins the Padma. The Surma-Meghna, at 669 kilometers by itself the longest river in Bangladesh, is formed by the union of six lesser rivers. Below the city of Kalipur it is known as the Meghna. When the Padma and Meghna join together, they form the fourth river system--the Padma-Meghna--which flows 145 kilometers to the Bay of Bengal.

This mighty network of four river systems flowing through the Bangladesh Plain drains an area of some 1.5 million square kilometers. The numerous channels of the Padma-Meghna, its distributaries, and smaller parallel rivers that flow into the Bay of Bengal are referred to as the Mouths of the Ganges. Like the Jamuna, the Padma-Meghna and other estuaries on the Bay of Bengal are also known for their many chars.

A fifth river system, unconnected to the other four, is the Karnaphuli. Flowing through the region of Chittagong and the Chittagong Hills, it cuts across the hills and runs rapidly downhill to the west and southwest and then to the sea. The Feni, Karnaphuli, Sangu, and Matamuhari--an aggregate of some 420 kilometers--are the main rivers in the region. The port of Chittagong is situated on the banks of the Karnaphuli. The Karnaphuli Reservoir and Karnaphuli Dam are located in this area. The dam impounds the Karnaphuli River's waters in the reservoir for the generation of hydroelectric power (see Technological Advances , ch. 3).

During the annual monsoon period, the rivers of Bangladesh flow at about 140,000 cubic meters per second, but during the dry period they diminish to 7,000 cubic meters per second. Because water is so vital to agriculture, more than 60 percent of the net arable land, some 9.1 million hectares, is cultivated in the rainy season despite the possibility of severe flooding, and nearly 40 percent of the land is cultivated during the dry winter months. Water resources development has responded to this "dual water regime" by providing flood protection, drainage to prevent overflooding and waterlogging, and irrigation facilities for the expansion of winter cultivation. Major water control projects have been developed by the national government to provide irrigation, flood control, drainage facilities, aids to river navigation and road construction, and hydroelectric power. In addition, thousands of tube wells and electric pumps are used for local irrigation. Despite severe resource constraints, the government of Bangladesh has made it a policy to try to bring additional areas under irrigation without salinity intrusion (see Agriculture , ch. 3).

Water resources management, including gravity flow irrigation, flood control, and drainage, were largely the responsibility of the Bangladesh Water Development Board. Other public sector institutions, such as the Bangladesh Krishi Bank, the Bangladesh Rural Development Board, the Bangladesh Bank, and the Bangladesh Agricultural Development Corporation were also responsible for promotion and development of minor irrigation works in the private sector through government credit mechanisms (see Money and Banking , ch. 3).

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