| 1. |
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| 2. |
- Destouni, Georgia, et al.
(författare)
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Biogeochemical Transformation Pathways through the Land-water Geosphere
- 2014
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Konferensbidrag (refereegranskat)abstract
- Water on land undergoes and participates in many biogeochemical exchanges and changes. A bits-and-pieces approach to these may miss essential aspects of change propagation and transformation by land-water through different segments of the Earth system. This paper proposes a conceptualization of the entire land-water geosphere as a scale-free catchment-wise organised system (Figure 1), emphasizing four key new system aspects compared to traditional hydrosphere/water cycle view: i) distinction of coastal divergent in addition to traditional convergent catchments; ii) physical and social-ecological system coupling through four main nodal zones/interfaces (surface, subsurface, coastal, observation); iii) flow-transport pathways as system coupling agents; iv) multiple interactions with the anthroposphere as integral system parts. Utilizing this conceptualization, we identify distinct patterns of direct anthropogenic change in large-scale water and waterborne nutrient fluxes, emerging across different parts of the world. In general, its embedment directly in the anthroposphere/technosphere makes land-water a key geosphere for understanding and monitoring human-driven biogeochemical changes. Further progress in system-level understanding of such changes requires studies of land-water as a continuous yet structured geosphere following the proposed spatiotemporal pathways of change propagation-transformation.
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| 3. |
- Destouni, Georgia, 1961-, et al.
(författare)
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Needs and means to advance science, policy and management understanding of the freshwater system : A synthesis report
- 2015
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Rapport (övrigt vetenskapligt/konstnärligt)abstract
- Fragmented and inconsistent understanding of the freshwater system limits our ability to achieve water security and sustainability under the human-driven changes occurring in the Anthropocene. To advance system-level understanding of freshwater, gaps and inconsistencies in knowledge, data, representations and links of processes and subsystems need to be identified and bridged under consideration of the freshwater system as a continuous whole. Based on such identification, a freshwater system conceptualization is developed in this report, which emphasizes four essential, yet often neglected system aspects:i) Distinction of coastal divergent catchments.ii) Four main zones (surface, subsurface, coastal, observation) of different types of freshwater change.iii) Water pathways as system-coupling agents that link and partition water change among the four change zones.iv) Direct interactions with the anthroposphere as integral system pathways across the change zones.We explain and exemplify some key implications of these aspects, identifying in the process also distinct patterns of human-driven changes in large-scale water fluxes and nutrient loads.The present conceptualization provides a basis for common inter- and trans-disciplinary understanding and systematic characterization of the freshwater system function and its changes, and of approaches to their modeling and monitoring. This can be viewed and used as a unifying checklist that can advance science, policy and management of freshwater and related environmental changes across various scales and world regions.
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| 4. |
- Franzén, Frida, 1979-, et al.
(författare)
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Involving farmers in local water eutrophication management : lessons learnt from two Swedish catchments
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Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Stakeholder participation is increasingly important in water governance worldwide. In Europe, the EU Water Framework Directive (WFD) requires Member states to encourage the active involvement of stakeholders in planning and implementation of the WFD. In Sweden, eutrophication is one of the major water quality problems, which is primarily caused by diffuse nutrient leakage from agriculture. Farmers are, therefore, increasingly invited to participate in local water groups to discuss potential local action to mitigate nutrient leakage. This paper presents the lessons learnt from two Swedish catchments, where farmers and other local stakeholders participated in local water groups. Both catchments have severe eutrophication problems, and have been pointed out as “hot-spots” for wetland creation as mitigation measure. The overall aim of this study was to identify farmers’ primary concerns regarding local water management and wetland creation in particular. The results were based on data from meeting observation, interviews and a questionnaire. The paper identified four major aspects: (i) farmers’ concern about the commitment of other actors in local action plans; (ii) farmers desired improved information on local water management, monitoring of water quality, as well as improved information on wetland creation; (iii) farmers were concerned about phosphorus scarcity, and were interested in wetlands as phosphor traps; and, (iv) farmers requested developments in catchment-based platforms. Therefore, the paper suggests that organization of water management at catchment level could play an important role to cope with farmers’ primary concerns: Catchment platforms should disseminate information on local water management, identify information and data gaps, distribute responsibilities and commitment, enhance incentives for farmers’ commitment and enable trust-building. Consideration of these aspects could lead towards more robust forms for participation, inducing action and, consequently, improved water quality.
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| 5. |
- Franzén, Frida, 1979-, et al.
(författare)
-
Involving farmers in local water eutrophication management : lessons learnt from two Swedish catchments
-
Annan publikation (övrigt vetenskapligt/konstnärligt)abstract
- Stakeholder participation is increasingly important in water governance worldwide. In Europe, the EU Water Framework Directive (WFD) requires Member states to encourage the active involvement of stakeholders in planning and implementation of the WFD. In Sweden, eutrophication is one of the major water quality problems, which is primarily caused by diffuse nutrient leakage from agriculture. Farmers are, therefore, increasingly invited to participate in local water groups to discuss potential local action to mitigate nutrient leakage. This paper presents the lessons learnt from two Swedish catchments, where farmers and other local stakeholders participated in local water groups. Both catchments have severe eutrophication problems, and have been pointed out as “hot-spots” for wetland creation as mitigation measure. The overall aim of this study was to identify farmers’ primary concerns regarding local water management and wetland creation in particular. The results were based on data from meeting observation, interviews and a questionnaire. The paper identified four major aspects: (i) farmers’ concern about the commitment of other actors in local action plans; (ii) farmers desired improved information on local water management, monitoring of water quality, as well as improved information on wetland creation; (iii) farmers were concerned about phosphorus scarcity, and were interested in wetlands as phosphor traps; and, (iv) farmers requested developments in catchment-based platforms. Therefore, the paper suggests that organization of water management at catchment level could play an important role to cope with farmers’ primary concerns: Catchment platforms should disseminate information on local water management, identify information and data gaps, distribute responsibilities and commitment, enhance incentives for farmers’ commitment and enable trust-building. Consideration of these aspects could lead towards more robust forms for participation, inducing action and, consequently, improved water quality.
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| 6. |
- Hammer, Monica, et al.
(författare)
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Governance of Water Resources in the Phase of Change : A Case Study of the Implementation of the EU Water Framework Directive in Sweden
- 2011
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Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 40:2, s. 210-220
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Tidskriftsartikel (refereegranskat)abstract
- In this article, focusing on the ongoing implementation of the EU Water Framework Directive, we analyze some of the opportunities and challenges for a sustainable governance of water resources from an ecosystem management perspective. In the face of uncertainty and change, the ecosystem approach as a holistic and integrated management framework is increasingly recognized. The ongoing implementation of the Water Framework Directive (WFD) could be viewed as a reorganization phase in the process of change in institutional arrangements and ecosystems. In this case study from the Northern Baltic Sea River Basin District, Sweden, we focus in particular on data and information management from a multi-level governance perspective from the local stakeholder to the River Basin level. We apply a document analysis, hydrological mapping, and GIS models to analyze some of the institutional framework created for the implementation of the WFD. The study underlines the importance of institutional arrangements that can handle variability of local situations and trade-offs between solutions and priorities on different hierarchical levels.
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| 7. |
- Jencson, Jacob E., et al.
(författare)
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Discovery of an Intermediate-luminosity Red Transient in M51 and Its Likely Dust-obscured, Infrared-variable Progenitor
- 2019
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Ingår i: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 880:2
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Tidskriftsartikel (refereegranskat)abstract
- We present the discovery of an optical transient (OT) in Messier. 51, designated M51 OT2019-1 (also ZTF 19aadyppr, AT 2019abn, ATLAS19bz1), by the Zwicky Transient Facility (ZTF). The OT rose over 15. days to an observed luminosity of M-r = -13 (nu L-nu = 9 x 10(6) L-circle dot), in the luminosity gap between novae and typical supernovae (SNe). Spectra during the outburst show a red continuum, Balmer emission with a velocity width of approximate to 400 km s(-1), Ca II and [Ca II] emission, and absorption features characteristic of an F-type supergiant. The spectra and multiband light curves are similar to the so-called SN impostors and intermediate-luminosity red transients (ILRTs). We directly identify the likely progenitor in archival Spitzer Space Telescope imaging with a 4.5 mu m luminosity of M-[4.5] approximate to -12.2 mag and a [3.6]-[4.5] color redder than 0.74 mag, similar to those of the prototype ILRTs SN 2008S and NGC 300 OT2008-1. Intensive monitoring of M51 with Spitzer further reveals evidence for variability of the progenitor candidate at [ 4.5] in the years before the OT. The progenitor is not detected in pre-outburst Hubble Space Telescope optical and near-IR images. The optical colors during outburst combined with spectroscopic temperature constraints imply a higher reddening of E(B - V) approximate to 0.7 mag and higher intrinsic luminosity of M-r approximate to -14.9 mag (nu L-nu = 5.3 x 10(7) L-circle dot) near peak than seen in previous ILRT candidates. Moreover, the extinction estimate is higher on the rise than on the plateau, suggestive of an extended phase of circumstellar dust destruction. These results, enabled by the early discovery of M51. OT2019-1 and extensive pre-outburst archival coverage, offer new clues about the debated origins of ILRTs and may challenge the hypothesis that they arise from the electron-capture induced collapse of extreme asymptotic giant branch stars.
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| 8. |
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| 9. |
- Quin, Andrew, et al.
(författare)
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Dissecting the ecosystem service of large-scale pollutant retention : The role of wetlands and other landscape features
- 2015
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Ingår i: Ambio. - : Springer Science and Business Media LLC. - 0044-7447 .- 1654-7209. ; 44, s. s127-S137
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Tidskriftsartikel (refereegranskat)abstract
- Various features of a landscape contribute to the regulating ecosystem service of reducing waterborne pollutant loading to downstream environments. At local scales, wetlands have been shown to be effective in retaining pollutants. Here, we investigate the landscape-scale contribution to pollutant retention provided by multiple wetlands. We develop a general analytical model which shows that the retention contribution of wetlands and other landscape features is only significant if a large fraction of the total waterborne pollutant transport passes through them. Next, by means of a statistical analysis of official data, we quantify the nutrient retention contribution of wetlands for multiple sub-catchments in two Swedish Water Management Districts. We compare this with the retention contribution of two other landscape features: the waterborne transport distance and major lakes. The landscape-scale retention contribution of wetlands is undetectable; rather, the other two landscape features account for much of the total nutrient retention.
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| 10. |
- Quin, Andrew, et al.
(författare)
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How to "walk the talk" : The perspectives of sector staff on implementation of the rural water supply programme in Uganda
- 2011
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Ingår i: Natural resources forum (Print). - : Wiley. - 0165-0203 .- 1477-8947. ; 35:4, s. 269-282
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Tidskriftsartikel (refereegranskat)abstract
- Many countries in sub-Saharan Africa have adopted similar approaches to tackle the challenges of rural water supply, including community-based management, community participation and the demand-responsive approach. These are often combined with nationwide programmes of capacity-building and decentralization. This paper first shows how Uganda has adopted these approaches in its rural water supply programme. Based on Government documents, we construct an organizational framework that illustrates the overall programme and outlines the roles and responsibilities which actors are expected to fulfil. Second, based on interviews with sector staff and a review of Government documents, the paper examines challenges to successfully walk the talk; that is, it provides insight into challenges affecting programme implementation. Among numerous difficulties, two key issues are highlighted: local political interference and the weak capacity of local governments. Concerning local political interference, local planning processes need to be reformed so that local politicians commit more strongly to improving water supply. Regarding local government capacity, the Government department responsible for the programme has established eight regional units that provide support to local governments. This promising strategy, combined with more appropriate engagement and the commitment of local politicians, should help to improve the implementation of the rural water supply programme in Uganda.
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