scholarly journals Can integrative catchment management mitigate future water quality issues caused by climate change and socio-economic development?

2016 ◽  
Author(s):  
Mark Honti ◽  
Nele Schuwirth ◽  
Jörg Rieckermann ◽  
Christian Stamm
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Land Use ◽  
Economic Development ◽  
Integrated Water Resources Management ◽  
Quality Parameters ◽  
Catchment Management ◽  
Model Structure ◽  
Resources Management ◽  
Socio Economic Development

Abstract. Catchments are complex systems where water quantity, quality and the provided ecological services are determined by interacting physical, chemical, biological, economic, and social factors. The awareness of these interactions led to the prevailing catchment management paradigm of Integrated Water Resources Management. The design and evaluation of solutions for integrated water resources management requires to predict changes of local or regional water quality, which requires integrated approach for modeling too. On one hand, integrated models have to be comprehensive enough to cover the aspects relevant for management decisions, allow for mapping of global change processes – as climate change, population growth, migration, and socio-economic development – to the regional and local contexts. On the other hand, models have to be sufficiently simple and fast enough to apply proper methods of uncertainty analysis, which can consider model structure deficits and propagate errors through the chain of submodels. Here, we present an integrated catchment model satisfying both objectives. The conceptual "iWaQa" model was developed to support the integrated management of small streams. It can predict both traditional water quality parameters like nutrients and a wide set of organic micropollutants originating from plant and material protection products. Due to the model's simplicity, it allows for a full, propagative analysis of predictive uncertainty, including certain structural and input errors. The usefulness of the model is demonstrated by predicting future water quality in a small catchment with mixed land use in the Swiss Plateau. The focus of our study is the change of water quality over the next decades driven by climate change, population growth or decline, socio-economic development and the implementation of management strategies for improving water quality. Our results indicate that input and model structure uncertainties are the most influential factors on certain water quality parameters and in these cases the uncertainty of modeling is already very high for the present conditions. Nevertheless, a proper quantification of today's uncertainty can make the management fairly robust for the foreseen range of possible evolution into the next decades. With a time-horizon of 2050, it seems that human land use and management decisions have a larger influence on water quality than climate change. However, the analysis of single climate model chains indicates that the importance of climate grows when a certain climate prediction is considered instead of the ensemble forecast.

scholarly journals Can integrative catchment management mitigate future water quality issues caused by climate change and socio-economic development?

2017 ◽  
Vol 21 (3) ◽  
pp. 1593-1609 ◽  
Author(s):  
Mark Honti ◽  
Nele Schuwirth ◽  
Jörg Rieckermann ◽  
Christian Stamm
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Land Use ◽  
Surface Water ◽  
Management Strategies ◽  
Surface Water Quality ◽  
Quality Parameters ◽  
Model Structure ◽  
Predictive Uncertainty ◽  
Socio Economic Development

Abstract. The design and evaluation of solutions for integrated surface water quality management requires an integrated modelling approach. Integrated models have to be comprehensive enough to cover the aspects relevant for management decisions, allowing for mapping of larger-scale processes such as climate change to the regional and local contexts. Besides this, models have to be sufficiently simple and fast to apply proper methods of uncertainty analysis, covering model structure deficits and error propagation through the chain of sub-models. Here, we present a new integrated catchment model satisfying both conditions. The conceptual iWaQa model was developed to support the integrated management of small streams. It can be used to predict traditional water quality parameters, such as nutrients and a wide set of organic micropollutants (plant and material protection products), by considering all major pollutant pathways in urban and agricultural environments. Due to its simplicity, the model allows for a full, propagative analysis of predictive uncertainty, including certain structural and input errors. The usefulness of the model is demonstrated by predicting future surface water quality in a small catchment with mixed land use in the Swiss Plateau. We consider climate change, population growth or decline, socio-economic development, and the implementation of management strategies to tackle urban and agricultural point and non-point sources of pollution. Our results indicate that input and model structure uncertainties are the most influential factors for certain water quality parameters. In these cases model uncertainty is already high for present conditions. Nevertheless, accounting for today's uncertainty makes management fairly robust to the foreseen range of potential changes in the next decades. The assessment of total predictive uncertainty allows for selecting management strategies that show small sensitivity to poorly known boundary conditions. The identification of important sources of uncertainty helps to guide future monitoring efforts and pinpoints key indicators, whose evolution should be closely followed to adapt management. The possible impact of climate change is clearly demonstrated by water quality substantially changing depending on single climate model chains. However, when all climate trajectories are combined, the human land use and management decisions have a larger influence on water quality against a time horizon of 2050 in the study.

Integration of environmental flow assessment and freshwater conservation planning: a new era in catchment management

2011 ◽  
Vol 62 (3) ◽  
pp. 290 ◽  
Author(s):  
J. L. Nel ◽  
E. Turak ◽  
S. Linke ◽  
C. Brown
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
Water Resources Management ◽  
Conservation Planning ◽  
Integrated Water Resources Management ◽  
Environmental Flow ◽  
Freshwater Ecosystems ◽  
Catchment Management ◽  
Freshwater Conservation ◽  
Resources Management

Integrated water resources management offers an ideal platform for addressing the goals of freshwater conservation and climate change adaptation. Environmental flow assessment and systematic conservation planning have evolved separately in respective aquatic and terrestrial realms, and both are central to freshwater conservation and can inform integrated water resources management. Integrating these two approaches is mutually beneficial. Environmental flow assessment considers dynamic flow regimes, measuring social, economic and ecological costs of development scenarios. Conservation planning systematically produces different conservation scenarios that can be used in assessing these costs. Integration also presents opportunities to examine impacts of climate change on conservation of freshwater ecosystems. We review progress in environmental flow assessment and freshwater conservation planning, exploring the mutual benefits of integration and potential ways that this can be achieved. Integration can be accomplished by using freshwater conservation planning outputs to develop conservation scenarios for assessment against different scenarios, and by assessing the extent to which each scenario achieves conservation targets. New tools that maximise complementarity by achieving conservation and flow targets simultaneously should also be developed.

scholarly journals Participatory Modelling of Surface and Groundwater to Support Strategic Planning in the Ganga Basin in India

Water ◽  
2019 ◽  
Vol 11 (12) ◽  
pp. 2443 ◽  
Author(s):  
Marnix van der Vat ◽  
Pascal Boderie ◽  
Kees Bons ◽  
Mark Hegnauer ◽  
Gerrit Hendriksen ◽  
...  
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Economic Development ◽  
Water Resources ◽  
Strategic Planning ◽  
Water Availability ◽  
Ganga Basin ◽  
Socio Economic Development ◽  
The Impact ◽  
Surface And Groundwater

The Ganga Basin in India experiences problems related to water availability, water quality and ecological degradation because of over-abstraction of surface and groundwater, the presence of various hydraulic infrastructure, discharge of untreated sewage water, and other point and non-point source pollution. The basin is experiencing rapid socio-economic development that will increase both the demand for water and pollution load. Climate change adds to the uncertainty and future variability of water availability. To support strategic planning for the Ganga Basin by the Indian Ministry of Water Resources, River Development and Ganga Rejuvenation and the governments of the concerned Indian states, a river basin model was developed that integrates hydrology, geohydrology, water resources management, water quality and ecology. The model was developed with the involvement of key basin stakeholders across central and state governments. No previous models of the Ganga Basin integrate all these aspects, and this is the first time that a participatory approach was applied for the development of a Ganga Basin model. The model was applied to assess the impact of future socio-economic and climate change scenarios and management strategies. The results suggest that the impact of socio-economic development will far exceed the impacts of climate change. To balance the use of surface and groundwater to support sustained economic growth and an ecologically healthy river, it is necessary to combine investments in wastewater treatment and reservoir capacity with interventions that reduce water demand, especially for irrigation, and that increase dry season river flow. An important option for further investigation is the greater use of alluvial aquifers for temporary water storage.

scholarly journals Modeling response of water quality parameters to land-use and climate change in a temperate, mesotrophic lake

2020 ◽  
Vol 713 ◽  
pp. 136549 ◽  
Author(s):  
Nicholas J. Messina ◽  
Raoul-Marie Couture ◽  
Stephen A. Norton ◽  
Sean D. Birkel ◽  
Aria Amirbahman
Keyword(s):  
Climate Change ◽  
Water Quality ◽  
Land Use ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Mesotrophic Lake

scholarly journals Climate Change Policy Implications of Sustainable Development Pathways in Korea at Sub-National Scale

2020 ◽  
Vol 12 (10) ◽  
pp. 4310
Author(s):  
Yeora Chae ◽  
Seo Hyung Choi ◽  
Yong Jee Kim
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Economic Development ◽  
Climate Change Policy ◽  
Climate Change Impacts ◽  
Future Climate Change ◽  
Climate Scenarios ◽  
Mitigation And Adaptation ◽  
Change Policy ◽  
Socio Economic Development

Climate action is goal 13 of UN’s 17 Sustainable Development Goals (SDG). Future impacts of climate change depend on climatic changes, the level of climate change policy, both mitigation and adaptation, and socio-economic status and development pathways. To investigate the climate change policy impact of socio-economic development pathways, we develop three pathways. Climate change affects socio-economic development in many ways. We interpret global storylines into South Korean contexts: Shared Socio-economic Pathway 1 (SSP1), SSP2, and SSP3 for population, economy, and land use. SSP elements and proxies were identified and elaborated through stakeholder participatory workshops, demand survey on potential users, past trends, and recent national projections of major proxies. Twenty-nine proxies were quantified using sector-specific models and downscaled where possible. Socio-economic and climate scenarios matrixes enable one to quantify the contribution of climate, population, economic development, and land-use change in future climate change impacts. Economic damage between climate scenarios is different in SSPs, and it highlights that SSPs are one of the key components for future climate change impacts. Achieving SDGs generates additional incentives for local and national governments as it can reduce mitigation and adaptation policy burden.

scholarly journals Landscape Evolution and It’s Impact of Ecosystem Service Value of the Wuhan City, China

2021 ◽  
Vol 18 (24) ◽  
pp. 13015
Author(s):  
Ru Chen ◽  
Chunbo Huang
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Economic Development ◽  
Ecosystem Services ◽  
Ecosystem Service ◽  
Landscape Change ◽  
Urban Expansion ◽  
Wuhan City ◽  
Socio Economic Development ◽  
The Impact

Rapid urbanization and industrialization and enhanced ecological protection measures have greatly influenced landscape change, which has exacerbated regional landscape competition and conflicts and indirectly affected the supply of ecosystem services. Clarifying the relationship between ecosystem service change and landscape change is useful for understanding the impact of ecosystem conversion on socio-economic development and providing a knowledge base for relevant policy decisions. In this study, we used remote sensing technology to process Landsat TM/ETM+/OLI imageries, combined with transformation analysis and kernel density analysis to study the spatial and temporal characteristics of land use change in Wuhan City from 1980 to 2020. We also estimated the ESV in the region using the improved unit area value equivalent method to reveal the trends of ESV changes in Wuhan. The results showed that land use changes in Wuhan during 1980–2020 occurred mainly in terms of decreases in farmland, forestland, and bare land, as well as increases in built-up land and water bodies. The built-up land was mainly concentrated in the main urban areas, but its area in each suburban area has increased in recent years. In contrast, farmland was mainly distributed in suburban areas, and its area has been decreasing in recent years due to the impact of urban expansion. However, the reduction is compensated for by the reclamation of ecological land such as grassland and forestland, which has aggravated the loss of ecosystem service values in the study area. In addition, human activities such as urban expansion have increased the demand for water resources, while also leading to ecological problems such as water scarcity and water quality degradation, which have caused serious losses to key ecosystem services in Wuhan city. Therefore, in order to alleviate the competition and conflicts in the landscape and mitigate the loss of ecosystem service values in this area, we have proposed some constructive suggestions for future urban planning and water quality improvements in Wuhan. The focus of these suggestions is on controlling the expansion of built-up land, as well as the conservation of ecological land and resource protection. Meanwhile, our findings can also provide reference information for land resource planning and ecological monitoring, and help researchers to understand the contribution of ecosystem service functions in relation to socio-economic development.

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