What drives the water quality changes in the Selenga Basin: climate change or socio-economic development?

Malsy, Marcus; Flörke, Martina; Borchardt, Dietrich

doi:10.1007/s10113-016-1005-4

Cited by 28 publications

(33 citation statements)

References 38 publications

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“…Therefore, there is a considerable uncertainty about both the direction and magnitude of future precipitation change, with current global circulation models unable to reproduce recently observed changes (Bhend and Whetton 2013;Törnqvist et al 2014). For several Central Asian rivers, it is nevertheless predicted that the combined effects of water withdrawals and climate change are likely to lead to a reduced streamflow in the future Malsy et al 2016;Stone 2008;Varis 2014).…”

Section: Hydrology and Water Availabilitymentioning

confidence: 99%

“…While some parts of Central Asia have experienced a recent depopulation, the region's overall population continues to grow. Improper municipal wastewater management in growing urban areas is another major pressure, leading to rising pollution levels in rivers and groundwater with regard to organic substances, nutrients and pathogens Darracq and Destouni 2005;Hofmann et al 2011;Malsy et al 2016), and posing sanitary risks for local settlers (Bosch et al 2007;Sorokovikova et al 2013;Uddin et al 2014). While in recent years, programs for the renewal of urban wastewater infrastructures have started in many parts of the region, decentral options still tend to be neglected, but would be viable solutions in regions with small settlements and low population densities (Khurelbaatar et al 2017).…”

Section: Water Quality and Aquatic/riparian Ecologymentioning

confidence: 99%

“…Challenges include a lack of environmental monitoring and management, the relatively quick transience of small mines and their spatially diffuse development (McIntyre et al 2016;Pfeiffer et al 2015). Even though contaminant transport toward the Selenga delta does take place Malsy et al 2016;Thorslund et al 2012), it should be noted that contaminations currently have the largest effects in local hot spots Inam et al 2011;Kaus et al 2016b;Pfeiffer et al 2015). Currently, there are different views regarding their impact on Lake Baikal itself.…”

Section: Water Quality and Aquatic/riparian Ecologymentioning

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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Section: Hydrology and Water Availabilitymentioning

confidence: 99%

Section: Water Quality and Aquatic/riparian Ecologymentioning

confidence: 99%

Section: Water Quality and Aquatic/riparian Ecologymentioning

confidence: 99%

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

et al. 2017

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“…In addition, water is much more likely to feature eutrophication due to human activities in densely populated and economically developed areas [2]. However, the major human factors affecting water quality include socio-economic development [3,4], land cover change [5,6], and water conservancy project construction [7,8]. Water diversion is included in water conservancy projects, which can change nutrient concentration distributions [9,10].…”

Section: Introductionmentioning

confidence: 99%

Statistical Assessment of Water Quality Issues in Hongze Lake, China, Related to the Operation of a Water Diversion Project

Dai

et al. 2018

Sustainability

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Abstract:The Hongze Lake serves as the first important transfer and storage path along the East Route of the South-to-North Water Diversion Project (SNWDP-ER). After the Project began operating in 2013, eutrophication in the lake has created increasing public concern regarding the direct effect on water quality from the project. In this paper, we used multivariate statistical methods to examine the variances between water quality variables at four site groups (inlets and outlets in the study area) and during three seasons (wet, normal, and dry seasons) in Eastern Hongze Lake. We also used redundancy analysis (RDA) to analyze environmental factors' impact on water quality. We found that (1) the concentrations of nitrogen and phosphorus were exceeding the standard values; (2) No significant spatial heterogeneity regarding nitrogen and phosphorus among the inlet/outlet of Eastern Hongze Lake existed in normal and wet seasons, and there was no evidence demonstrating that SNWDP-ER could improve eutrophication or even contribute to eutrophication in the dry season; (3) Environmental factors (land use, water diversion, and population) have limited influences on water quality, which was possibly caused by the overly-high river input and artificial input of nitrogen and phosphorus. Thus, it is critical to reinforce the control of pollution sources and enhance the ecological restoration.

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“…The fragile institutional capability of the concerned agencies involved in the water policies sector in developing countries makes the conditions worse, and henceforth there is a continual decline of the water quality of freshwater resources at a global scale [5]. From a human use perspective, this generally results in increasing costs associated with water treatment and a decline in the availability of usable water [6]. While increasing population and economic development are also blamed for increasing pollution of freshwater resources, it is likely that future climate change will exacerbate water quality problems [7].…”

Section: Introduction and Research Backgroundmentioning

confidence: 99%

Current Assessment and Future Outlook for Water Resources Considering Climate Change and a Population Burst: A Case Study of Ciliwung River, Jakarta City, Indonesia

Kumar

Masago

Mishra

et al. 2017

Water

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Abstract:Modeling insecurity under future climate change and socio-economic development is indispensable for adaptive planning and sustainable management of water resources. This case study strives to assess the water quality and quantity status for both the present and the near future in the Ciliwung River basin inside the Jakarta Province under different scenarios using population growth with planned additional wastewater management infrastructure by 2030 as mentioned in the local master plan, and comparing the above conditions with the addition of the effects of climate change. Biochemical oxygen demand (BOD), chemical oxygen demand (COD) and nitrate (NO 3 ), the three important indicators of aquatic ecosystem health, were simulated to assess river pollution. Simulation results suggest that water quality in year 2030 will further deteriorate compared to the base year 2000 due to population growth and climate change, even considering the planned wastewater management infrastructure. The magnitude of impact from population growth is far greater than that from climate change. Simulated values of NO 3 , BOD and COD ranged from 6.07 to 13.34 mg/L, 7.65 to 11.41 mg/L, and 20.16 to 51.01 mg/L, respectively. Almost all of the water quality parameters exceeded the safe limit suitable for a healthy aquatic system, especially for the year 2030. The situation of water quality is worse for the downstream sampling location because of the cumulative effect of transport of untreated pollutants coming from upstream, as well as local dumping. This result will be useful for local policy makers and stakeholders involved in the water sector to formulate strategic and adaptive policies and plan for the future. One of the potential policy interventions is to implement a national integrated sewerage and septage management program on a priority basis, considering various factors like population density and growth, and global changes for both short-and long-term measures.

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What drives the water quality changes in the Selenga Basin: climate change or socio-economic development?

Cited by 28 publications

References 38 publications

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

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

Statistical Assessment of Water Quality Issues in Hongze Lake, China, Related to the Operation of a Water Diversion Project

Current Assessment and Future Outlook for Water Resources Considering Climate Change and a Population Burst: A Case Study of Ciliwung River, Jakarta City, Indonesia

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