NDLI: Rise and decline of the fishery industry in the Aydarkul–Arnasay Lake System (Uzbekistan): effects of reservoir management, irrigation farming and climate change on an unstable ecosystem

Content Provider	Springer Nature Link
Author	Groll, M. Kulmatov, R. Mullabaev, N. Opp, C. Kulmatova, D.
Copyright Year	2016
Abstract	Originally, a shallow saline depression between the Kyzylkum and the Nurata mountain range the Aydarkul–Arnasay Lake System (AALS) was created in 1969 when a catastrophic flood event in the Syr Darya catchment exceeded the capacity of the Chardarya reservoir. Additional water diversions further increased the volume of the lakes to up to 42.2 mln m$^{3}$ in 2006. After the breakdown of the commercial fishing in the Uzbek part of the Aral Sea in 1983, the AALS became the most important fishery lake in Uzbekistan with an annual catch of more than 4600 tons (in 1988). In recent years, however, the fish catch experienced a sharp decline (down to 728 tons in 2006) due to the increased inflow of drainage water from the large Golodnaya Steppe (Hunger Steppe) irrigation scheme (e.g., 0.1 km$^{3}$ in 1960, 1.0 km$^{3}$ in 1970, 2.3 km$^{3}$ in 1980, 2.9 km$^{3}$ in 2000 and 3.6 km$^{3}$ in 2010) and a decrease in freshwater inflow from the Chardarya reservoir (e.g., 4.0 km$^{3}$ in 1995, 2.3 km$^{3}$ in 2005 and 1.8 km$^{3}$ in 2010). The increasing anthropogenic pressure, as well as the impacts of the climate change (+0.6–0.9 °C between 1950 and 2000, decrease in the long-term precipitation and increase in the variability), is threatening this ecological and economic important lake system. This article presents new data about the temporal dynamic of the lake hydrology (size, volume, water balance), the surrounding climate and its development as well as about the water quality of the lakes and the main drainage water collectors, and the development of the fish fauna over the last decades. This study, based on official data (Uzhydromet, Uzryba), online databases (GHCN) and extensive field work (water quality and fish sampling), provides a complete published analysis of the status quo of the AALS. Therefore, it is an important contribution to the establishment of a stable lake ecosystem system and a sustainable fishing industry.
Starting Page	1
Ending Page	15
Page Count	15
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	75
Issue Number	10
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2016-05-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Aydarkul–Arnasay Lake System Chardarya reservoir Collector drainage water Fishery Water quality Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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