Application of ecohydrology in the Brahmaputra River

• Autorzy: Boruah S. , Biswas S.P.
• Języki publikacji: EN

Abstrakty

EN

Changes in hydro-geological pattern of the river Brahmaputra, due to changes in topography, altitude, precipitation, and soil conditions, has resulted in zonation of the river into five major types of habitats that influence the distribution of fish biota. The erratic nature of water discharge, high rates of erosion and siltation, and habitat destruction have negative impacts on the commercial fishery as shown by a gradual decline of almost all commercial varieties of fishes. The flood pulse is probably the strongest factor that regulates other limnological factors and faunal distribution. Between May and October, there are about two to four high floods and fish landings are closely related to this flood regime, while during the dry season fishing is mostly localized near the confluents of rivers and at river meanders. However, large-scale felling of trees in the catchment areas and construction of embankments along the river and major tributaries have resulted in the river becoming heavily silted and the connecting channels of floodplain lakes dammed. Consequently fishes and other aquatic mega fauna are deprived of adequate water cover. Use of small-meshed gears and certain other highly objectionable fishing methods have threatened the natural stock of fish fauna in the upstream of the river. Hydrology, water management and the management of human interferences play a crucial role in the conservation of biodiversity in the entire Brahmaputra ecosystem. The present paper therefore provides an ecohydrological insight into the Brahmaputra river system and proposes certain remedial measures for sustainable water management.

Słowa kluczowe

EN

development; fish assemblage; flood regime; Brahmaputra River; management; habitat restoration; ecohydrology; water resource; Asia

• Wydawca: -
• Czasopismo: International Journal of Ecohydrology and Hydrobiology
• Rocznik: 2002
• Tom: 02
• Numer: 1-4
• Opis fizyczny: p.79-87,fig.,ref.

Twórcy

autor

Boruah S.

• D.H.S.K. College, P.O.C.R. Building, Jibon Phukan Nagar, Dibrugarh, Assam, India 786003

autor

Biswas S.P.