Abstract Short‐ to medium‐range flood forecasts are central predicting and mitigating the impact of flooding across world. However, producing reliable reducing forecast uncertainties remains challenging, especially in poorly gauged river basins. The growing availability synthetic aperture radar (SAR)‐derived image databases (e.g., generated from SAR sensors such as Envisat advanced radar) provides opportunities improve quality. This study contributes development more accurate global near...

This paper investigates the challenge of representing structural differences in river channel cross-section geometry for regional to global scale hydraulic models and effect this can have on simulations wave dynamics. Classically, is defined using data, yet at larger scales necessary information model structures do not exist take approach. We therefore propose a fundamentally different approach where uncertainty represented simple parameterisation, which could then be estimated through...

Abstract. Single satellite synthetic aperture radar (SAR) data are now regularly used to estimate hydraulic model parameters such as channel roughness, depth and water slope. However, despite geometry being critical the application of models poorly known a priori, it is not frequently object calibration. This paper presents unique method simultaneously calibrate bankfull roughness within 2-D LISFLOOD-FP using an archive moderate-resolution (150 m) ENVISAT SAR-derived flood extent maps binary...

Abstract. Coastal floods, driven by extreme sea levels, are one of the most dangerous natural hazards. The people at highest risk those living in low-lying coastal areas exposed to tropical-cyclone-forced storm surges. Here we apply a novel modelling framework estimate past and/or present and future storm-surge-level extreme-sea-level probabilities along coastlines southern China, Vietnam, Cambodia, Thailand, Malaysia. A regional hydrodynamic model is configured simulate 10 000 years...

Abstract A novel geometry parameterisation method constructed from a volume-of-solid driven cellular automata is presented. The capable of describing complex arbitrary topology using set parameters applied to control mesh. This done by approximating the smooth minimum surface area subject localised constraints on contained volume defined both mesh and parameters. Localised refinement possible through splitting cells provide additional degrees freedom where necessary. shown reconstruct over...

<title>Abstract</title> Achieving the Paris Agreement’s long-term temperature goal of limiting global warming well-below 2°C while pursuing efforts to limit it 1.5°C requires rapid and sustained reductions in greenhouse gas emissions andAchieving CO₂ be withdrawn from atmosphere safely stored. However, pathways consistent with span a wide range emission coming years: IPCC indicates 34-60% cuts (GHG) between 2019-2030. This is major source policy uncertainty. A key determinant rate...

Observational rain gauge/satellite and reanalysis datasets since the 1950s are evaluated for trends in mean extreme rainfall around Mainland Southeast Asia (MSEA). Rain gauge data indicate strong increases exceeding 50% both annual precipitation various indices over Vietnam northwestern part of peninsula 1979. The remote influence ENSO may partially explain recent trend toward a more intense regional hydrological cycle, response to predominant La Niña states decades. Increasing MSEA is also...

Abstract. Floods are consistently identified as the most serious global natural hazard, causing devastating loss of life and economic damages that run into multiple billions dollars each year. At coastline, many flood disasters in fact compound events, with two or more drivers occurring concurrently quick succession. In coastal regions combined effect fluvial (river) (storm-tides – storm surges plus high astronomical tides) floods together has a greater impact than if occurred separately....

Abstract. Floods are consistently identified as the most serious global natural hazard, causing devastating loss of life and economic damage that runs into multiple billions US dollars each year. At coastline, many flood disasters in fact compound events, with two or more drivers occurring concurrently quick succession. In coastal regions combined effect fluvial (river) (storm tides – storm surges high astronomical tides) floods has a greater impact than if occurred separately. Deltas...

Observations of the temporal and spatial variations water depth in rivers floodplains are very important operational hydrology. However, our capacity to monitor at large scale is still limited. As a result, need measure storage changes all wetlands, lakes, reservoirs has motivated radar interferometry-based Surface Water Ocean Topography Mission (SWOT) scheduled for launch 2020.

A field trial in which outdoor air was sampled with an active reference sampler and several passive HTO-in-air samplers simultaneously carried out at Chalk River Laboratories. Both were changed on approximately monthly schedule from 1990 September 2 to 1991 April 18. Average temperatures for the sampling intervals ranged −8.6°C +15.5°C concentrations measured by typically 10 Bq/m3. total of 129 measurements made during seven intervals. The used type described Stephenson,1 prepared either...

Abstract. Single satellite Synthetic Aperture Radar (SAR) data are now regularly used to estimate hydraulic model parameters such as channel roughness, depth and water slope. However despite geometry being critical the application of models poorly known a priori, it is not frequently object calibration. This paper presents unique method calibrate simultaneously bankfull roughness within 2D LISFLOOD-FP using an archive moderate (75m) resolution SAR satellite-derived flood extent maps binary...

This paper describes The People's Panel for AI – a mechanism to build public trust in products and services from conceptualization deployment. To increase awareness of how data-driven systems are affecting the lives ordinary people, series Artificial Intelligence Roadshows were delivered community centers. Community members recruited completed two days training about key aspects data, ethics, including learning technique exploring ethical new technologies (consequence scanning). As part...

Tritium is one of several radioactive nuclides routinely monitored in and around CANDU@ (Canada Deuterium Uranium) power reactor facilities. Over the last ten years, passive samplers have replaced active sampling devices for tritiated water vapor workplace at many CANDU stations. The potential outdoor monitoring has also been realized. This paper presents result a 1-y field trial carried out all five Canadian sites. results indicate that can be used most locations to measure air...

Abstract. The Ca Mau Peninsula plays a critical role in the agricultural and aquacultural productivity of Vietnam Mekong Delta (VMD), central to regional food security population’s economic social welfare. Unfortunately, this region has also historically been hotspot for natural disasters, particularly from flooding, which is initiated by seasonal river flux upstream heightened sea levels downstream, but exacerbated global climate change (e.g., increased rainfall sea-level rise, tropical...

<title>Abstract</title> Achieving the Paris Agreement’s long-term temperature goal of limiting global warming well-below 2°C while pursuing efforts to limit it 1.5°C requires rapid and sustained reductions in greenhouse gas emissions CO₂ be withdrawn from atmosphere safely stored. However, pathways consistent with span a wide range emission coming years: IPCC indicates 34-60% cuts (GHG) 2030 relative 2019. This is major source policy uncertainty. A key determinant rate at which...

Commercial E-PERM radon-in-air monitors modified to detect tritium in air have been evaluated. Each monitor consists of a small ion chamber with access holes around the sides allow diffuse into chamber, and an electret at bottom establish electrostatic potential. Radioactive gas inside volume generates ions, which are collected by electret. The reduction charge (and subsequent surface potential) on is measure integrated exposure. Two types detectors, 50 cm3 model 200 model, were tested for...