Preprints

Filtering by Subject: Civil and Environmental Engineering

Flood Mitigation Data Analytics and Decision Support Framework: Iowa Middle Cedar Watershed Case Study

Ibrahim Demir, Enes Yildirim, Yazeed Alabbad

Published: 2021-10-23
Subjects: Civil and Environmental Engineering, Engineering, Environmental Studies, Geographic Information Sciences, Risk Analysis

Flooding is one of the most frequent natural disasters, causing billions of dollars in damage and threatening vulnerable communities worldwide. Although the impact of flooding can never be diminished, minimizing future losses is possible by taking structural or non-structural mitigation actions. Mitigation applications are often costly practices. However, they can be more feasible for long-term [...]

Linking technical geothermal potential from borehole heat exchangers and heating demand scenarios on a regional scale

Johannes Miocic, Marc Krecher

Published: 2021-10-20
Subjects: Civil and Environmental Engineering, Earth Sciences, Engineering, Environmental Sciences, Natural Resources Management and Policy, Other Earth Sciences, Physical Sciences and Mathematics

Extracting shallow geothermal energy using borehole heat exchangers (BHEs) can help decarbonising the residential heating sector. To assist urban planers and policy makers in developing carbon-neutral heating plans the regional technical shallow geothermal potential must be analysed. Here, we propose a methodology to estimate the technical geothermal potential of BHE fields on a regional scale [...]

Holistic systems-thinking for policy coherence: A case study of socio-institutional challenges and opportunities for improved adoption of nature-based solutions

Cyndi Castro

Published: 2021-10-13
Subjects: Civil and Environmental Engineering, Environmental Studies

Nature-based solutions (NBSs) are often managed according to hydro-environmental characteristics that disregard the complex interactions between decision-makers, society, and the environment. Numerous barriers to NBS adoption have been identified as stemming from human behavior (e.g., community buy-in, political will, culture), yet we lack an understanding of how such factors interrelate to [...]

Combining shallow-water and analytical wake models for tidal array micro-siting

Connor Jordan, Davor Dundovic, Anastasia Fragkou, et al.

Published: 2021-07-30
Subjects: Civil and Environmental Engineering, Civil Engineering, Engineering, Hydraulic Engineering, Oceanography

Array optimisation is critical for improving power performance and reducing infrastructure costs thereby helping enable tidal-stream energy to become a competitive renewable energy source. However, ascertaining an optimal array layout is a highly complex problem, subject to the specific site hydrodynamics characterisation and multiple inter-disciplinary constrains. In this work, we present a [...]

Probabilistic near-field tsunami source and tsunami run-up distribution inferred from tsunami run-up records in northern Chile

Jun-Whan Lee, Jennifer Irish, Robert Weiss

Published: 2021-07-27
Subjects: Civil and Environmental Engineering, Geophysics and Seismology, Other Oceanography and Atmospheric Sciences and Meteorology

Understanding a tsunami source and its impact is vital to assess a tsunami hazard. Thanks to the efforts of the tsunami survey teams, high-quality tsunami run-up data exists for contemporary events. Still, it has not been widely used to infer a tsunami source and its impact mainly due to the computational burden of the tsunami forward model. In this study, we propose a TRRF-INV (Tsunami Run-up [...]

Integrating Scientific Knowledge into Machine Learning using Interactive Decision Trees

Georgios Sarailidis, Thorsten Wagener, Francesca Pianosi

Published: 2021-07-23
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering

Decision Trees (DT) is a machine learning method that has been widely used in the environmental sciences to automatically extract patterns from complex and high dimensional data. However, like any data-based method, is hindered by data limitations and potentially physically unrealistic results. We develop interactive DT (iDT) that put the human in the loop and integrate the power of experts’ [...]

New systemically measured sand mining budget for the Mekong Delta reveals rising trends and significant volume underestimations

Charles Robin Gruel, Edward Park, Loc Huu Ho, et al.

Published: 2021-07-16
Subjects: Civil and Environmental Engineering, Earth Sciences, Physical Sciences and Mathematics, Planetary Sciences

The river beds of the Mekong Delta are some of the most intensively sand mined places in the world, however sand mining budgets are limited to rough and indirect estimates. Here, we provide a systematic, semi-physically based estimation of the Mekong Delta’s sand mining budget. We provide a quantified budget that overcomes limitations resulting from previous reliance on officially declared [...]

On the Efficacy of Compact Radar Transponders for InSAR Geodesy: Results of Multi-year Field Tests

Richard Czikhardt, Hans van der Marel, Juraj Papco, et al.

Published: 2021-06-25
Subjects: Aerospace Engineering, Civil and Environmental Engineering, Earth Sciences, Electrical and Computer Engineering, Engineering, Environmental Sciences, Physical Sciences and Mathematics

Compact and low-cost radar transponders are an attractive alternative to corner reflectors (CR) for SAR interferometric (InSAR) deformation monitoring, datum connection, and geodetic data integration. Recently, such transponders have become commercially available for C-band sensors, which poses relevant questions on their characteristics in terms of radiometric, geometric, and phase stability. [...]

FROM THE PAST TO THE FUTURE: SPATIO-TEMPORAL DYNAMICS OF WATER-BALANCE IN A RAPIDLY URBANIZING KATHMANDU VALLEY WATERSHED OF NEPAL

Suchana Acharya, Tomoharu Hori, Saroj Karki

Published: 2021-04-23
Subjects: Civil and Environmental Engineering, Engineering

The resources of the earth are under immense pressure due to the multiple anthropogenic influences. The land resources which largely attribute to the quality as well as quantity of the water, is facing extreme stress due to the rapid urbanization resulting from population growth as well as socio-economic development. It is imperative that the response of hydrological processes to the change in [...]

Microstructural differences between naturally-deposited and laboratory beach sands

Amy Ferrick, Vashan Wright, Michael Manga, et al.

Published: 2021-04-14
Subjects: Civil and Environmental Engineering, Civil Engineering, Earth Sciences, Engineering, Geophysics and Seismology, Geotechnical Engineering, Physical Sciences and Mathematics, Sedimentology

The orientation of and contacts between grains of sand reflect the processes that deposit the sands. Grain orientation and contact geometry also influence mechanical properties. Quantifying and understanding sand microstructure thus provide an opportunity to understand depositional processes better and connect microstructure and macroscopic properties. We compare naturally-deposited beach sands [...]

A Regional Semi-Distributed Streamflow Model Using Deep Learning

Zhongrun Xiang, Ibrahim Demir, Ricardo Mantilla, et al.

Published: 2021-03-08
Subjects: Civil and Environmental Engineering, Engineering, Environmental Studies, Hydrology

Recent studies have shown that deep learning models in hydrological applications significantly improved streamflow predictions at multiple stations compared to traditional machine learning approaches. However, most studies lack generalization; i.e. researchers are training separate models for each location. The spatial and temporal generalization ability of deep learning models in hydrology that [...]

How unprecedented was the February 2021 Texas cold snap?

James Doss-Gollin, David J Farnham, Upmanu Lall, et al.

Published: 2021-02-28
Subjects: Civil and Environmental Engineering, Earth Sciences, Environmental Sciences, Risk Analysis

Winter storm Uri brought severe cold to the southern United States in February 2021, causing a cascading failure of interdependent systems in Texas where infrastructure was not adequately prepared for such cold. In particular, the failure of interconnected energy systems restricted electricity supply just as demand for heating spiked, leaving millions of Texans without heat or electricity, many [...]

Global climate-driven trade-offs between the water retention and cooling benefits of urban greening

Mark Cuthbert, Gabriel Rau, Adam Bates, et al.

Published: 2021-02-23
Subjects: Civil and Environmental Engineering, Construction Engineering and Management, Earth Sciences, Engineering, Environmental Engineering, Environmental Health and Protection, Environmental Sciences, Hydrology, Physical Sciences and Mathematics, Sustainability, Water Resource Management

Heat-related mortality and flooding are pressing challenges for the >4 billion urban population worldwide, exacerbated by increasing urbanization and climate change. Urban greening, such as green roofs and parks, can potentially help address both problems, but the geographical variation of the relative hydrological and thermal performance benefits of such interventions are unknown. Here we [...]

Displacing fishmeal with protein derived from stranded methane

Sahar Head El Abbadi, Evan D Sherwin, Adam R Brandt, et al.

Published: 2021-02-23
Subjects: Bioresource and Agricultural Engineering, Civil and Environmental Engineering, Engineering, Environmental Engineering

Methane emitted and flared from industrial sources across the United States is a major contributor to global climate change. Methanotrophic bacteria can transform this methane into useful protein-rich biomass for animal feed. In the rapidly growing aquaculture industry, this can replace ocean-caught fishmeal, reducing demands on over-harvested fisheries. Here, we analyze the economic potential of [...]

Real-time Flood Mapping on Client-side Web Systems using HAND model

Anson Hu, Ibrahim Demir

Published: 2021-02-19
Subjects: Civil and Environmental Engineering, Computational Engineering, Engineering

The height above nearest drainage (HAND) model is frequently used to calculate properties of the soil as well as predict flood inundation extents. HAND is extremely useful due to its lack of reliance on prior data, as only the digital elevation model (DEM) is needed. It is close to optimal, running in linear or linearithmic time in the number of cells depending on the values of the heights. It [...]

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