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No Thumbnail AvailableBook (series)Inland Fisheries Under the Impact of Irrigated Agriculture: Central Asia 1995
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No results found.This publication contains four papers on general and specific aspects of inland fisheries in the arid region of Central Asia. It discusses the management approaches to maintain fish yields in an aquatic environment highly modified by engineering measures required for irrigated agriculture. With the riverine fish stocks greatly diminished and the most valuable fish, such as sturgeon, shovelnose and Aral trout virtually extinct in the Amu-Darya and Syr-Darya, lacustrine fish were introduced to res ervoirs, lakes and irrigation canals where today they represent by far the dominant portion of the total catch. The interconnecting net of irrigation canals has provided perfect migration pathways for redistribution of fish species throughout the Amu-Darya, Syr-Darya and Zarafshan river systems and has contributed, together with exotic fish species introductions, to increasing fish species diversity. In spite of these measures, the fish yields have stayed relatively low. In Uzbekistan the mean f ish yield is about 10 kg/ha/year. Much more could be achieved for enhancement of fisheries through introducing a diversity of management measures. Fisheries management plans have been prepared for the individual Uzbekistan water bodies and await implementation. While the direct impact on the original fish fauna of engineering works required for irrigated agriculture in Central Asia is negative, fisheries management can compensate for the losses in production through species introductions and oth er enhancement measures which would utilize the great diversity of water bodies in the region to their full capacity. Wide exchange of information among the countries of the arid and semi-arid zone through an expert consultation could be a start for developing better strategies for and implementation of fisheries development in irrigated areas. -
Book (stand-alone)Agricultural Drainage Water Management in Arid and Semi-arid Areas
FAO Irrigation and Drainage Paper
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No results found.This publication deals with the underlying concepts relating to drainage water management. It first discusses the adequate identification and definition of the problem for the selection and application of a combination of management options. It then presents technical considerations and details on the four groups of drainage management options. The second part of the publication contains the summaries of the case studies from the United States of America, Central Asia, Egypt, India and Pakista n. These case studies represent a cross-section of approaches to agricultural drainage water management. The factors affecting drainage water management include geomorphology, hydrology, climate conditions and the socio-economic and institutional environment. -
Policy briefConsumption-based water management 2023
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No results found.Water scarcity and rising competition for water are facts of life in semi-arid and arid parts of South and West Asia and are emerging, often in localized hotspots, in South-East Asian countries with high but seasonal rainfall. The main drivers of rising water scarcity are population growth, consequent food demand, associated economic development and changing dietary preferences. In addition, water development in Asia has overlooked the importance of environmental flows to sustain aquatic ecosystems and the ecosystem services that many water users rely upon for their livelihoods. Comparatively speaking, irrigation is the largest water use that needs to be balanced with environmental water needs. The purpose of this brief is to provide policy-makers and experts with an understanding of consumption-based water management (CBWM) so that they can consider whether it may – or may not – be possible to apply it in irrigation- dependent parts of Asia that are currently experiencing, or are expected to experience, overextraction of water resources, in particular groundwater.
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