Terrain Modeling Articles
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WISPR Accuracy Study - RESEPI M2X vs. XT-32
Introduction What is a LiDAR Payload? LiDAR stands for Light Detection and Ranging and has become an increasingly prevalent technology over the past decade. NASA and meteorologists have used LiDAR, now embedded within cell phones with the release of the iPhone 12 Pro. LiDAR is commonly used in surveying, mapping, and inspection applications where it can provide very detailed and accurate ...
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Choosing the Right Self-Loading Concrete Mixer for Your Construction Project
When it comes to construction projects, efficiency and versatility are paramount. The choice of equipment can significantly impact the success and efficiency of your project. Self-loading concrete mixers have emerged as a versatile and efficient solution for on-site concrete production, but selecting the right one for your project is crucial. In this article, we will explore the factors to ...
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Rapid Groundwater Exploration - Case Study
A Vehicle-Mounted Solution Using CrossOver CO730 Customer’s task The Swedish Geological Survey (SGU) has been engaged in groundwater exploration projects to investigate Sweden’s many glacial river deposits. The deposits are spread across the country and are the most significant groundwater resources for drinking water supplies in Sweden. SGU wanted a GPR solution to deploy rapidly to ...
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Landslide Disaster Protection on the National Road Network, Cianjur, West Java, Indonesia - Case Study
Project Summary Project Two months before the annual Indonesian Homecoming Festival in West Java, a catastrophic landslide affected the road between Bogor and Cianjur, worsening the already terrible traffic situation on West Java’s main thoroughfare. The Ministry of Public Works retained PT. Wijaya Karya (WIKA) to provide an effective feasibility study while performing preventive measures ...
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Birmingham, AL I-59/I-20 Corridor Project - Birmingham, Alabama, United States - Case Study
Project Summary Project Located in the Birmingham Business District, the I-59/I-20 interchange is Alabama’s busiest corridor, with vehicular demand almost tripling since it was originally built in the 1960s. To improve functionality and capacity of the structurally deficient interchange, Alabama Department of Transportation (ALDOT) initiated a USD 750 million reconstruction project that ...
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Establishment and application of three-dimensional realistic river terrain in the numerical modeling of flow over spillways
We present an integrated three-dimensional (3D) spillway model where the realistic and complicated river terrain is implemented by the platform CATIA (Computer Aided Three Dimensional Interactive Application). This integrated 3D spillway model allows for complicated topographic and geomorphic conditions and describes the spatial distribution of the spillway dam (upstream reservoir, downstream ...
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Time-lapse photography for monitoring reservoir leakages (Montejaque dam, Andalusia, southern Spain)
A methodology based on the use of time-lapse photographs is presented to evaluate the leakages over time of a reservoir (Montejaque dam, Málaga Province, Spain) that feeds a karstic aquifer. In particular, photographic control allows the evolution of water levels in the dam and the river that feeds it to be monitored. Through changes in water volume, which are calculated from the level ...
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Modeling streamflow from coupled airborne laser scanning and acoustic Doppler current profiler data
The rating curve enables the translation of water depth into stream discharge through a reference cross-section. This study investigates coupling national scale airborne laser scanning (ALS) and acoustic Doppler current profiler (ADCP) bathymetric survey data for generating stream rating curves. A digital terrain model was defined from these data and applied in a physically based 1-D ...
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Exploring nature-based solutions - The role of green infrastructure in mitigating the impacts of weather- and climate change-related natural hazards
Natural resource scarcity, climate change impacts, continued employment crises, public budget debts and economic recovery plans are some of the challenges that governments in Europe currently face. Moreover, Member States in the European Union (EU) need to continue building or rebuilding roads, sewage systems, levees, etc. (also known as grey infrastructure). Despite being essential for economic ...
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Analysis of extreme flooding events through a calibrated 1D/2D coupled model: the case of Barcelona (Spain)
This paper presents the results of a calibrated 1D/2D coupled model simulating surface and sewer flows in Barcelona. The model covers 44 km2 of the city land involving 241 km of sewers. It was developed in order to assess the flood hazard in the Raval district, historically affected by flooding during heavy rainfalls. Special attention was paid to the hydraulic characterization of the inlet ...
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Ditch network extraction and hydrogeomorphological characterization using LiDAR-derived DTM in wetlands
While much emphasis has been placed on the importance of hydrology as a driving force for wetlands, few small stream drainage networks have been mapped. Light Detection and Ranging (LiDAR) data can provide very high-precision topographic maps over large areas, and have been used to extract drainage networks in forested areas, vineyards, and high mountain pastures. The study objective is to ...
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Generating meshes for tidal wetland modeling using light detection and ranging (LiDAR) data
A high resolution model mesh was required to numerically simulate sediment transport in tidal marshes. The timing of flooding is dependent on the tidal marsh ground elevation, which requires accurate topographic elevation data. The tidal prism of the marsh is determined by the volume provided by tidal channels in the system. Hence, their location and bathymetry needed to be represented ...
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Performance evaluation of CALINE 4 model in a hilly terrain – a case study of highway corridors in Himachal Pradesh (India)
CALINE 4 highway dispersion model is extensively used all over the world including India for prediction of vehicular pollution along highway corridors. A few studies have reported its application and suitability under complex/hilly terrain. In the present paper, an attempt has been made to evaluate the performance of CALINE 4 model in hilly terrain for Indian traffic and meteorological ...
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Calculations of external irradiation from radioactive plume in the early stage of a nuclear accident
A mathematical method for real–time calculations of cloudshine doses/dose rates used for purposes of online assimilation of model predictions with observations incoming from terrain is proposed. Model predictions of cloudshine doses have to be calculated simultaneously in an array of positions located on terrain around a nuclear facility. A modification of the classical straight–line Gaussian ...
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Effects of nocturnal thermal circulation and boundary layer structure on pollutant dispersion in complex terrain areas: a case study
For air quality models, it is important that the meteorological fields derived from meteorological models reflect the best characterisation of the atmosphere. Under strongly thermally–stratified conditions, the determining factors are turbulent kinetic energy and surface layer parameterisations. In this study, the 5th generation Mesoscale Model (MM5) and the Weather Research and Forecasting ...
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Environmental impact assessment of a new thermal power plant Šoštanj Block 6 in highly complex terrain
Slovenia is starting an important investment - Block 6 of the thermal power plant in Šoštanj located in the Velenje basin and characterised by very complex terrain. Air pollution examination as part of the environmental impact assessment is an interesting example of usage of the modern Lagrangian particle model Spray coupled with the diagnostic mass consistent wind field model ...
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Evaluating emergency response models of radiological dispersion in complex terrain
Operational airborne releases of trace quantities of the radioactive noble gas 41Ar from the HIFAR Nuclear Research Reactor located in Sydney, Australia, are valuable for evaluating emergency response models incorporating radiological dispersion. A network of meteorological stations and GR–150 environmental gamma dose detectors are placed in the complex terrain within a 5 km radius of the site. ...
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Evolution of an integrated 1D/2D modeling package for urban drainage - Case Study
Introduction: Recent flooding events in North America have revealed deficiencies in existing stormwater infrastructure and management practices. The development of effective and efficient designs requires a comprehensive understanding of flooding in urban areas and complex open channel and overland flow systems. Traditional one dimensional (1D) models are used to simulate flow in river channels ...
By Innovyze
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1D & 2D modelling of urban drainage systems using xpswmm and Tuflow - Case Study
Introduction: The release of a revised New South Wales (NSW) Floodplain Management Manual in 2001 established a new direction for urban flood management in NSW. This new direction was created by a redefinition of the floodplain as the area bounded by the Probable Maximum Flood (PMF) – this poses a challenge to estimate PMF flooding in highly urban areas and particularly in piped drainage ...
By Innovyze
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A methodology for processing raw LiDAR data to support urban flood modelling framework
An assessment has been carried out to study the performance of seven different LiDAR filtering algorithms and to evaluate their suitability for urban flood modelling applications. It was found that none of these algorithms can be regarded as fully suitable to support such work in its present form. The paper presents the augmentation of an existing Progressive Morphological filtering algorithm for ...
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