Water quality, potential conflicts and solutions—an upstream–downstream analysis of the transnational Zarafshan River (Tajikistan, Uzbekistan)

Groll, Michael; Opp, Chr.; Kulmatov, Rashid; Ikramova, М.; Normatov, I. Sh.

doi:10.1007/s12665-013-2988-5

Cited by 79 publications

(47 citation statements)

References 35 publications

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“…A smaller amount of copper, nitrates and organ chlorine pesticides (OCP) has been brought into the reservoir with incoming rivers runoff. All of the compounds listed above may also be coming with the transit flow from the territory of Uzbekistan [19], where the population and area of irrigated fields are increase every year [20,21]. The preferential relationship with the river runoff was identified for mineral phosphorus, polyphosphates, nitrites and zinc.…”

Section: Discussionmentioning

confidence: 99%

Statistical approach to estimate the anthropogenic sources of potentially toxic elements on the shardara reservoir (Kazakhstan)

Krupa¹,

Ss²,

Amirgaliev³

et al. 2017

MOJES

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In June of 2015, we investigated the distribution of biogenic elements, heavy metals, and pesticides in the waters of the Shardara Reservoir. The average content of ammonium, nitrates, nitrites and phosphates in the water did not exceed the limit values set for the fishery water bodies. Zinc concentration in the water averaged 0.121, copper -0.040, cadmium -0.003, lead -0.034 mgdm -3 , isomers of hexachlorcyclohexane (HCCH) -0.0041 mg dm -3 . Wafer plots were built in order to identify the distribution correlation of hydro-chemical and toxic variables with the sources of pollution in Shardara reservoir, and statistical methods were used as well (correlation, multiple regression analysis methods, canonical correspondence analysis, and ecological mapping with the Statistica 12.0 Program). It was found that copper, nitrates, and isomers of HCCH enter the reservoir mainly with the drainage water discharged from irrigated fields along the southern bank. The source of mineral phosphorus, polyphosphates, nitrites and zinc is the river runs off rom the east. High concentration of heavy metals in the water could also be related to natural causes, as the water reservoir and its tributaries are located in a metallogenic province.

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Section: Discussionmentioning

confidence: 99%

Statistical approach to estimate the anthropogenic sources of potentially toxic elements on the shardara reservoir (Kazakhstan)

Krupa¹,

Ss²,

Amirgaliev³

et al. 2017

MOJES

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“…In Central Asia, where surface water resources are relatively scarce, water quality impairments by salts, agrochemicals, organic pollutants and heavy metals are frequent in the downstream parts of most river catchments (Groll et al 2015). Alterations of the hydrology often reinforce such changes in hydrogeochemistry.…”

Section: Water Quality and Aquatic/riparian Ecologymentioning

confidence: 99%

“…Groundwater and surface water in the Aral Sea Basin, for example, have been heavily polluted due to fertilizer and pesticide residues, and desiccation of water bodies may lead to eolian transports of such pollutants over long distances (Glantz 1999;Groll et al 2015;Opp et al 2016). Moreover, agricultural activities are a frequent source of soil and water salinization (Crosa et al 2006;Kuba et al 2013;Olsson et al 2013;Thevs et al 2013) and facilitate erosion and the influx of fine sediments, nutrients and agrochemicals into surface water bodies (Chalov et al 2013;Groll et al 2015;Pietroń et al 2017;Theuring et al 2015) where they may adversely affect the aquatic ecosystem (Hartwig and Borchardt 2014). In contrast to other parts of Central Asia, rapidly rising water consumption from the agricultural sector is evident in Mongolia.…”

Section: Water Quality and Aquatic/riparian Ecologymentioning

confidence: 99%

“…Even in regions that were not part of the Soviet Union such as Mongolia and the western parts of China, similar developments took place due to the rise of communism in the early twentieth century and substantial socioeconomic transformations which began in the late twentieth century and are typically still ongoing (Abdullaev and Rakhmatullaev 2015;Groll et al 2015;Heldt et al 2017).…”

Section: Water Usage and Managementmentioning

confidence: 99%

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Water in Central Asia: an integrated assessment for science-based management

et al. 2017

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Central Asia contains one of the largest internal drainage basins in the world, and its continental location results in limited availability of both surface and groundwater. Since the twentieth century, water resources of the region have been exploited beyond sustainable levels. From small Mongolian headwater streams to the mighty Aral Sea, surface waters have been partially desiccated. Demands from the agricultural, energy and raw material sectors as well as population growth have not only increased water abstractions, but also left a diverse and strong pollution footprint on rivers, lakes and groundwater bodies. Such changes in water quantity and quality have not only led to a degradation of aquatic and riparian ecosystems, but also they have placed the region's socioeconomic development at risk. Because of the complexity of Central Asia's water problems, integrated assessment and management approaches are required. Despite some shortcomings in practical implementation, the widespread adoption of the Integrated Water Resources Management and water-food-energy nexus approaches may be keys to a more sustainable future. This thematic issue aims to provide documentation of the current state of scientific knowledge, ranging from hydrological research to water quality investigations, and offers an assessment of ecosystems and the services provided by them. Reviews and case studies on different management options conclude the thematic issue by providing insights into field-tested solutions for the region's water challenges.

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“…Lotic systems are unique in terms of their hierarchical dendritic structuring and the clear spatial dependence of catchment and local-scale features. Many studies have found local features to strongly influence community structure (Astorga et al 2011;Death and Joy 2004;Groll et al 2015;Tonkin 2014), however, equally as many have highlighted the importance of large-scale influences (Heino 2009;Scott et al 2011;Shah et al 2014).…”

Section: Scalesmentioning

confidence: 99%

Community–environment relationships of riverine invertebrate communities in central Chinese streams

Jähnig

Shah

et al. 2015

Environ Earth Sci

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Chinese rivers are both highly biodiverse and highly under pressure, hence an urgent need exists to understand ecological drivers and disentangle different scales of stressors to support water management. Our aims were to (1) determine the most influential variables for benthic invertebrate occurrence, (2) compare results related to communities as opposed to metrics and (3) examine the role of spatial scales with relevance to management. Benthic invertebrate sampling was performed at 37 sites in selected tributaries of the middle reaches of the Yangtze, covering an environmental gradient with a focus on organic pollution (stratified sampling design). Ten metrics commonly used in biomonitoring were derived and analysed in parallel to assemblage data. Environmental variables covered 74 parameters from three different spatial scales, namely local, reach and catchment scale. We ran a CCA with each of the three subsets to find out the significant determining/explanatory variables, followed by pCCA and pRDA (for metric data) with these variables with forward selection to determine single variables important for each subset; we further used variation portioning for benthic invertebrate data. A high percentage of overall variability (70 %) of the assemblage structure was explained, with catchment-and local-scale variables being almost equally important. Small-scale variables tended to be more important than large-scale variables for the metric-based approach but not for the assemblage approach. Our results emphasise the need for spatially explicit regional studies in freshwater systems and suggest testing multi-metric assessment approaches to tackle water management and environmental health questions in China.

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Water quality, potential conflicts and solutions—an upstream–downstream analysis of the transnational Zarafshan River (Tajikistan, Uzbekistan)

Cited by 79 publications

References 35 publications

Statistical approach to estimate the anthropogenic sources of potentially toxic elements on the shardara reservoir (Kazakhstan)

Statistical approach to estimate the anthropogenic sources of potentially toxic elements on the shardara reservoir (Kazakhstan)

Water in Central Asia: an integrated assessment for science-based management

Community–environment relationships of riverine invertebrate communities in central Chinese streams

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