Hydro-geomorphological modelling of leaky wooden dam efficacy from reach to catchment scale with CAESAR-Lisflood 1.9j

Geoscientific model development, Journal Year: 2025, Volume and Issue: 18(5), P. 1395 - 1411

Published: March 5, 2025

Abstract. Leaky wooden dams (LDs) are woody structures installed in headwater streams that aim to reduce downstream flood risk through increasing in-channel roughness and decreasing river longitudinal connectivity order desynchronise peaks within catchments. Hydrological modelling of these omits sediment transport processes since the impact on flow routing is considered negligible comparison in-stream hydraulics. Such also excluded grounds computational expense. Here we present a study advances our ability model leaky roughness-based representation landscape evolution CAESAR-Lisflood, introducing flexible representative approach simulating LDs reach broader catchment-scale processes. The hydrological geomorphological sensitivity tested against grid resolution variability key parameters such as dam gap size roughness. influence isolation from whilst evaluating expense, domain outputs, internal evolution. findings show increased volume water stored test (channel length 160 m) by up an magnitude, it reduced discharge 31 % during storm event (6 h, 1-in-10-year event). We demonstrate how this due acting induce geomorphic change thus channel When considering larger resolutions, however, results care must be overestimations localised scour deposition behavioural approaches should adopted when using CAESAR-Lisflood absence robust empirical validation data.

Language: Английский

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Using multi‐criteria decision‐making methods in prioritizing structural flood control solutions: A case study from Iran

Journal of Flood Risk Management, Journal Year: 2024, Volume and Issue: 17(3)

Published: April 10, 2024

Abstract Effective management of flood risks requires the prioritization appropriate control solutions. This study aims to prioritize structural options using multi‐criteria decision‐making (MCDM) methods. Four MCDM methods, namely analytic hierarchy process, technique for order preference by similarity ideal solution, optimization and compromise Fuzzy‐VIKOR are employed assess rank based on multiple criteria. Field surveys, interviews with local authorities experts, on‐site assessments existing structures constituted primary data collection The findings demonstrate effectiveness reservoir dams, retention basins, levees as viable Conversely, gates no‐project were assigned lower priorities. highlight importance considering methods account variations in rankings. provides valuable insights into process prioritizing area. These can assist policymakers stakeholders effectively allocating resources implementing measures mitigate risks.

Language: Английский

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A Holistic Catchment‐Scale Framework to Guide Flood and Drought Mitigation Towards Improved Biodiversity Conservation and Human Wellbeing

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(1)

Published: Jan. 1, 2025

ABSTRACT As climatic extremity intensifies, a fundamental rethink is needed to promote the sustainable use of freshwater resources. Both floods and droughts, including water scarcity, are exacerbating declines in river biodiversity ecosystem services, with consequences for both people nature. Although this global challenge, densely populated regions such as Europe, East Asia North‐America, well most affected by climate change, particularly vulnerable. To date mitigation measures have mainly focused on individual, local‐scale targets, often neglecting hydrological connectivity within catchments interactions among hydrology, biodiversity, change human wellbeing. A comprehensive approach improve infiltration, retention groundwater recharge, thereby mitigating impacts heavy rainfall droughts scarcity. We propose holistic catchment‐scale framework that combines conventional civil engineering methods, nature‐based solutions conservation actions. This integrates legislation, substantial funding governance structure transcends administrative discipline boundaries, enabling coordinated actions across multiple spatial temporal scales. It necessitates collaboration local regional stakeholders citizens, scientists practitioners. vision management resources could synergistic effects support mitigate functional ecosystems deliver benefits people.

Language: Английский

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Investigating the impacts of tributary meander restoration on main channel flood mitigation through computational modelling

Journal of Environmental Management, Journal Year: 2025, Volume and Issue: 375, P. 124127 - 124127

Published: Jan. 25, 2025

Language: Английский

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Reframing Natural in Flood Management

Wiley Interdisciplinary Reviews Water, Journal Year: 2025, Volume and Issue: 12(2)

Published: March 1, 2025

ABSTRACT Natural Flood Management (NFM) has become a popular branch of research in contemporary flood risk management as policymakers and practitioners all around the world look for novel, holistic solutions to problems. As increasing river flows place additional pressure on conventional raised defenses, upstream catchment offers opportunities mitigate through flow attenuation potential securing wider environmental social benefits not typically associated with defenses. The science underpinning these catchment‐based approaches advanced rapidly over last two decades, terminology is now commonplace within policy practice, but there been little discussion what “natural” actually means context management. This paper explores definition framing NFM global anglophone scientific literature industry guidance, critically evaluate robustness concept, both theory practice. analysis reveals complex philosophical narrative physical implementation that does always sit easily an entirely framing. In order advance paradigm ensure long‐term success mainstream approach management, case made moving away from dichotomy natural vs. engineered, reframing nature based, solutions. A conceptualization trade‐offs between maximization optimization toward reduction explored, which relevance nature‐based initiatives gaining increased traction globe.

Language: Английский

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Use of Spatially Distributed TOPMODEL to Assess the Effectiveness of Diverse Natural Flood Management Techniques in a UK Catchment

Hydrological Processes, Journal Year: 2025, Volume and Issue: 39(4)

Published: April 1, 2025

ABSTRACT While natural flood management (NFM) is becoming more widely used, there remains a lack of empirical evidence regarding its effectiveness. The primary uncertainties arise from two key aspects: first, the determination NFM effectiveness constrained by relatively small catchment scales studied to date; second, combination multiple interventions within may lead peak synchronisation. In this study, both instream and terrestrial were modelled using spatially distributed hydrological model, Spatially Distributed TOPMODEL (SD‐TOPMODEL). To demonstrate how scale type interact influence peaks, we integrated various land cover changes, including woodland planting, soil aeration, floodplain restoration, hedgerow planting. comparison previous versions SD‐TOPMODEL, improved simulation efficiency enable grid‐based modelling up 200‐year return period event for an 81.4 km 2 with 5 m resolution. Following extensive parameter calibration validation, model demonstrated stability provided reliable fit achieving Nash‐Sutcliffe Efficiency coefficient 0.93 between observed discharge. results highlighted in reducing peaks at studied, particularly during single‐peaked storm events under dry pre‐event conditions. Moreover, combined use was effective resilient than single interventions, reductions ranging 4.2% 16.0% study catchment.

Language: Английский

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The Role of Runoff Attenuation Features (RAFs) in Natural Flood Management

Water, Journal Year: 2022, Volume and Issue: 14(23), P. 3807 - 3807

Published: Nov. 23, 2022

Natural Flood Management (NFM) and catchment-based solutions for flood risk management environmental problems are wide-ranging complex. of fluvial in the UK is undergoing a fundamental shift, with change emphasis from solely working structural defences to considering measures which attenuate runoff. At heart this NFM nature-based solutions. One key type intervention Runoff Attenuation Feature (RAF): class features that targets runoff flow pathways creates new temporary storage (such as ponds leaky barriers). However, there currently lack evidence effectiveness RAFs at larger catchment scales managing extreme events. Nevertheless, strong base suggest well-designed deliver range ecosystem services if installed correct location. This paper reviews critiques role an interventionist holistic approach lowering rates. The link between RAF design types their relationship land use scale made. Recent novel innovations attempts up discussed. antecedent conditions, groundwater residence time processes highlighted. uncertainty complexity proving underpin view thinking needed. New research required, many questions raised about NFM. direction travel positive proactive community can now embrace problem. Proof address not likely be resolved without great deal further but confidence do beneficial work growing argument greater amounts attenuation

Language: Английский

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Can sediments play a role in river flood risk mapping? Learning from selected European examples

Geoenvironmental Disasters, Journal Year: 2023, Volume and Issue: 10(1)

Published: Sept. 28, 2023

Abstract Background Climate change and increasing anthropogenic pressure are two of the major drivers extreme events like droughts floods. To deal with number flooding hitting Europe in last few decades, around twenty years ago European Commission started to develop ad-hoc legislation reduce flood risk by mapping hazard areas, such as Directive 2007/60/EC on Assessment Management Flood Risk. This looks identify regions where management strategies should be prioritized. Despite this holistic approach, flaws connected consideration sediment transport morphological changes rivers exist, leading potential underestimations impact floods affecting active watercourses or areas subjected frequent changes. Results By discussing six examples related lowland mountain affected significant 20 years, present mini-review aims provide additional evidence need for a rethinking mapping, moving from “clear water” perspective more integrated interactions between all fluvial components (water, sediment, biota, humans) adequately considered. Conclusions The reported here show importance considering wood management, suggesting integrating flood-related studies other disciplines geomorphology ecohydrology.

Language: Английский

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Bayesian model of tilling wheat confronting climatic and sustainability challenges

Frontiers in Artificial Intelligence, Journal Year: 2024, Volume and Issue: 7

Published: Aug. 27, 2024

Conventional farming poses threats to sustainable agriculture in growing food demands and increasing flooding risks. This research introduces a Bayesian Belief Network (BBN) address these concerns. The model explores tillage adaptation for flood management soils with varying organic carbon (OC) contents winter wheat production. Three real soils, emphasizing texture soil water properties, were sourced from the NETMAP soilscape of Pang catchment area Berkshire, United Kingdom. Modified OC content at four levels (1, 3, 5, 7%), they modeled alongside relevant variables BBN. Decision Support System Agrotechnology Transfer (DSSAT) simulated datasets across 48 cropping seasons parameterize study compared effects on yield, surface runoff, GHG-CO 2 emissions, categorizing parameters (from lower higher bands) based statistical data distribution. Results revealed that NT outperformed CT highest parametric category, comparing probabilistic estimates reduced emissions “7.34 7.31%” cumulative runoff “8.52 8.50%,” while yield increased “7.46 7.56%.” Conversely, exhibited 7.36%” 8.55%,” along 7.35%.” BBN effectively captured uncertainties, offering posterior probability distributions reflecting conditional relationships offered decision choice favoring stocks (highest among “NT.OC-7%PDPG8,” e.g., 286,634 kg/ha) over (lowest “CT.OC-3.9%PDPG8,” 5,894 kg/ha). On average, released minimum GHG- CO “3,985 kgCO eqv/ha,” emitted “7,415 eqv/ha.” “8,747 eqv/ha” maximum “15,356 resulted against all limits generations naturally alleviation potential customized improvement. recommends extensive assessments various spatiotemporal conditions. findings align development goals, SDG12 SDG13 responsible production climate actions, respectively, as defined by Agriculture Food Organization Nations.

Language: Английский

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Towards Catchment Scale Natural Flood Management: Developing evidence, funding and governance approaches

Environmental Policy and Governance, Journal Year: 2024, Volume and Issue: 34(6), P. 553 - 567

Published: March 12, 2024

Abstract Natural flood management is emerging as a viable way to leverage ecological services manage flooding. Stakeholders are progressively positioning natural at the scale of river catchments encourage move beyond localised and opportunistic actions towards more strategic cost‐effective risk responses. This reflects broader turn nature‐based solutions, acknowledgement climate change adaptation imperative, recognition that can achieve multiple socio‐economic biophysical co‐benefits. A particular set issues connected specific characteristics influencing attempts catchment scale. paper identifies evidence, funding governance key understanding challenges facing in this context, with these providing focus for identification strategies outcomes. case study exploring Irwell Northwest England provides empirical insights on themes approaches support transition management. calls wider implementation experimental field focused multi‐faceted evaluation, blended financing intermediaries help overcome overarching making transition.

Language: Английский

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