Chapter
Apr 26, 2012
Investigating Aquatic Ecosystems of Small Lakes in Khorezm, Uzbekistan
Authors: Laurel Saito [email protected], Julian Scott [email protected], Michael Rosen [email protected], Bakhriddin Nishonov [email protected], Sudeep Chandra [email protected], John P. A. Lamers [email protected], Dilorom Fayzieva [email protected], and Margaret Shanafield [email protected]Author Affiliations
Publication: World Environmental and Water Resources Congress 2009: Great Rivers
Abstract
The Khorezm province of Uzbekistan, located in the Aral Sea Basin, suffers from severe environmental and human health problems due to decades of unsustainable land and water management. Agriculture is the dominant land use in Khorezm, and agricultural runoff water has impacted many small lakes. In this water-scarce region, these lakes may provide a water source for irrigation or fish production. Samples have been collected from 13 of these lakes since 2006 to assess water quality, the aquatic food web, and possible limits to aquatic production. Lake salinity varied from 1 to >10 g/L both between and within lakes. Although hydrophobic contaminants concentrations were low (82–241 pg toxic equivalents/mL in June 2006, October 2006, and June 2007), aquatic species diversity and relative density were low in most lakes. Ongoing work is focused on 4 lakes with pelagic food webs to estimate fish production and assess anthropogenic impacts on the food web. Lake sediment cores are also being examined for organic contaminants, and hydrology is being assessed with stable isotopes.
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© 2009 American Society of Civil Engineers.
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Published online: Apr 26, 2012
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ASCE Technical Topics:
- Agricultural wastes
- Aquatic habitats
- Bodies of water (by type)
- Business management
- Developing countries
- Ecosystems
- Environmental engineering
- Infrastructure
- Lakes
- Land use
- Pollutants
- Practice and Profession
- Public administration
- Public health and safety
- Urban and regional development
- Urban areas
- Wastes
- Water and water resources
- Water management
- Water quality
- Water treatment
Authors
Affiliations
M.ASCE
Graduate, Program of Hydrologic Sciences, University of Nevada Reno, Mail Stop 186, 1664 N. Virginia Street, Reno, NV 89557. E-mail: [email protected]
Graduate, Program of Hydrologic Sciences, University of Nevada Reno, Mail Stop 186, 1664 N. Virginia Street, Reno, NV 89557;. E-mail: [email protected]
Nevada Basin and Range Study Unit, United States Geological Survey, 2730 N. Deer Run Road, Carson City, NV 89701;. E-mail: [email protected]
Laboratory of Surface Water Quality Investigation, Hydrometeorological Research Institute, 72 K. Makhsumov Str., Tashkent 700052 Uzbekistan;. E-mail: [email protected]
Department of Natural Resources and Environmental Science, University of Nevada Reno, Mail Stop 186, 1664 N. Virginia Street, Reno, NV 89557;. E-mail: [email protected]
UNESCO-ZEF German-Uzbek Khorezm Project, 14, Khamid Almjan Street, Khorezm 220100 Uzbekistan;. E-mail: [email protected]
Institute of Water Problems, Academy of Sciences of the Republic of Uzbekistan, N. Khadjibayev Str. 49, Tashkent 100041, Uzbekistan;. E-mail: [email protected]
Division of Hydrologic Sciences, Desert Research Institute, 2215 Raggio Parkway, Reno, NV 89512;. E-mail: [email protected]
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