Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—Ribeira Brava, Tabua

Published: June 9, 2023

This study’s primary goal was to conduct an analysis on the flood propensity of Tabua (Ribeira Brava) drainage basin’s main watercourse. In addition that, this study also recommends two different methodologies in order mitigate flood’s impacts, namely by dimensioning a detention basin and adjusting riverbed roughness coefficient. Regarding propensity, it necessary resort geomorphological data, which obtained when characterizing watershed; that data crucial determine expected peak flow rate, according Gumbel Distribution methodology considering 100 years return period, perform tasks SIG ArcGIS software. Lastly, analyzed capacity river mouth, conclude whether would have drain total volume rainwater if extreme event happen. Indeed, results point out watershed’s mouth doesn’t cope with event, for period considered. As consequence mitigation measures aforementioned were developed specific features: sizing estimated through Dutch Method Simplified Triangular Hydrograph Method, while adjustment coefficient considered valid solution enhance mouth.

Language: Английский

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Hydraulic Planning in Insular Urban Territories: The Case of Madeira Island—Ribeira Brava, Tabua

Water, Journal Year: 2023, Volume and Issue: 15(14), P. 2609 - 2609

Published: July 18, 2023

This study’s primary goal was to conduct an analysis of the flood propensity Tabua (Ribeira Brava) drainage basin’s main watercourse. In addition that, this study also recommends two different methodologies in order mitigate impacts, namely by dimensioning a detention basin and adjusting riverbed roughness coefficient. Regarding on propensity, it necessary resort geomorphological data, which were obtained when characterizing watershed; these data crucial determining expected peak flow rate, according Gumbel distribution methodology considering 100-year return period, perform tasks SIG ArcGIS 10.5 software. Lastly, capacity river mouth analyzed conclude whether would have drain total volume rainwater if extreme event happen. Indeed, results show that watershed’s does not cope with for period considered. As consequence, aforementioned mitigation measures developed specific features. The size estimated through Dutch method simplified triangular hydrograph method, while adjustment coefficient considered valid solution enhance mouth.

Language: Английский

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Severe Precipitation Phenomena in Crimea in Relation to Atmospheric Circulation

Atmosphere, Journal Year: 2022, Volume and Issue: 13(10), P. 1712 - 1712

Published: Oct. 18, 2022

The increase in the frequency and intensity of hazardous hydrometeorological phenomena is one most dangerous consequences climate instability. In this study, we summarize data on severe weather using from 23 meteorological stations Crimea 1976 to 2020. Particular attention was paid precipitation descriptions. For last 45 years, a significant positive trend interannual variability annual occurrence estimated be +2.7 cases per decade. for +1.3 probable maximum daily as quantitative indicator events each station by both stationary non-stationary GEV models. at least half stations, model more appropriate estimation extremes. An analysis main synoptic processes that drive carried out. greatest contribution formation made Mediterranean–Black Sea cyclones. At same time, all extreme were caused cyclones generated over Black only, seasons apart winter. mid-troposphere, four types meridional circulation identified depending location troughs ridges, with respect region. More than 42% accompanied an isolated high-altitude cyclone mid-troposphere recommendation can drawn study long-term climatic non-stationarity should taken into account whenever risk assessment or hazard results also favor designing drainage sewerage systems urban areas. findings atmospheric patterns used improvement forecasts.

Language: Английский

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Projected changes in heat, extreme precipitation, and their spatially compound events over China’s coastal lands and seas through a high-resolution climate models ensemble

Environmental Research Communications, Journal Year: 2024, Volume and Issue: 6(6), P. 065002 - 065002

Published: June 1, 2024

Abstract China’s coastal lands and seas are highly susceptible to the changing environment due their dense population frequent economic activities. These areas experience more significant impacts from climate change-induced extreme events than elsewhere. The most noticeable effects of change high temperatures precipitation. We employ an ensemble RCMs (Regional Climate Models) investigate project changes in temperature, precipitation, Compound Heat-Precipitation Extreme (CHPEs) over selected for both historical (1985–2004) future periods (2080–2099). multi-model projects that daily temperature extremes will increase by 2.9 °C 5.4 across seas, with land showing a higher marine areas. precipitation shows geographical heterogeneity 2.8–3.9 mm d −1 reduction 15–25°N while 2.2–5.4 increment 25°N-35°N use Clausius–Clapeyron relationship reveal peak 2–7 at which peaks 2 6 warming. area 25–30°N has highest 9.87 °C. As intensify increase, CHPEs projected occur frequently Compared period, frequency 40.9%-161.2% areas, 36.2%-163.6% future. 15–20°N CHPE events, largest difference under two different scenarios. It indicated be easily affected change.

Language: Английский

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地球系统视角下的多圈层复合极端事件研究进展与展望

SCIENTIA SINICA Terrae, Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 9, 2023

复合极端事件对社会、经济和生态所造成的影响相较于各事件独立发生时更为严重, 这类事件已成为近10年来地球科学领域的研究热点之一. 气候变化背景下许多复合极端事件频发、强发, 极端事件间的组合形式也呈现出新特点, 对科学研究和防灾应对提出了更高的要求和更严峻的挑战. 本文在地球系统多圈层相互作用的视角下系统梳理了多类高影响复合极端事件的定义、机理、变化、归因、预估等方面的研究现状; 探讨了复合极端事件研究在数据需求、机理分析、模型模拟、归因预估、风险评估和适应应对等方面的挑战及可能的解决方案; 进一步展望了该领域未来可能的发展趋势和急需多学科、多部门联合攻关的重点研究内容. 在气候变化重塑极端事件类型的背景下, 科学研究、防灾减灾和应对气候变化工作均需从传统单一极端事件视角向复合极端事件视角转变, 对研究对象、思路和方法进行全方位的革新. 本文对复合极端事件研究领域的发展和多学科领域的交叉合作将起到一定的促进作用.

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