Results 41 to 50 of about 1,141,152 (233)

Using LiDAR‐Based DEM Elevation Difference Calculations to Estimate Net Streambank Erosion in an Iowa River, USA

open access: yesRiver Research and Applications, Volume 41, Issue 7, Page 1418-1426, September 2025.
ABSTRACT Streambank erosion is an important source of sediment to river systems but is difficult to quantify at watershed scales. In this study, high‐resolution Light Detection and Ranging (LiDAR) measurements collected from 2009 and 2020 were used to quantify the difference in land surface elevation that occurred along the fourth and fifth‐order ...
Calvin F. Wolter   +3 more
wiley   +1 more source

Spatial and Temporal Characteristics of Extreme Hourly Precipitation in Sichuan Province Based on Spatially Dense Rainfall Observation

open access: yesGaoyuan qixiang
Based on the hourly precipitation data of 3454 stations with dense space in Sichuan Province and DEM (Digital Elevation Model) data with horizontal accuracy of 30 m, the temporal and spatial distribution characteristics of extreme hourly precipitation in
Qiuxue ZHOU, Lan KANG
doaj   +1 more source

Terrain Factors Induced Slope Instability in CNG 37 – Ghat section, Panthalur, The Nilgiris [PDF]

open access: yesE3S Web of Conferences
— Landslides are short-lived phenomena but can cause extraordinary changes in the landscape, destroying life and property. Mitigation and management of natural disasters are important issues.
Mani S.   +2 more
doaj   +1 more source

Glacier Variations at Xinqingfeng and Malan Ice Caps in the Inner Tibetan Plateau Since 1970

open access: yesRemote Sensing, 2020
The inner Tibetan Plateau is a glacierized region where glaciers show heterogeneous change. The Xinqingfeng and Malan ice caps are located in this region, and a transition zone exists with shifting influences between the westerlies and Indian summer ...
Zhen Zhang   +9 more
doaj   +1 more source

Applications of GIS in Flood Control and Crises Management Using Different Sources of DEMs in Al Arish, Sinai, Egypt [PDF]

open access: yesPort Said Engineering Research Journal, 2016
The aim of this research is to provide an approach to identify the potential routes of water flood in the study area as well as its relevant area of containment (Al Arish, North Sinai, Egypt).
Ahmed Amin   +4 more
doaj   +1 more source

A Discrete Element Method–Based Energetic Approach to Model Two‐Dimensional Fatigue Crack Propagation

open access: yesInternational Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 5, Page 1420-1436, 10 April 2025.
ABSTRACT In this work, a fatigue crack propagation model is proposed using the two‐dimensional discrete element method (DEM). The challenge lies in describing the small progressive fatigue crack growth within a single cycle, which is typically much smaller than the size of the smallest particles, making it difficult to continuously capture the loss of ...
Lei Ma   +3 more
wiley   +1 more source

The approach for combining dem acquisitions for the TanDEM-X dem mosaic [PDF]

open access: yes2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
For the global TanDEM-X DEM the whole world will be acquired by at least two coverages. Thereby on the one hand phase unwrapping errors are reduced by applying the dual-baseline method and on the other hand a low noise level is ensured even for difficult areas like forests and steep terrain.
Gruber, Astrid   +4 more
openaire   +2 more sources

Bias Correction of Satellite Precipitation Estimation Using Deep Neural Networks and Topographic Information Over the Western U.S.

open access: yesJournal of Geophysical Research: Atmospheres, Volume 130, Issue 4, 28 February 2025.
Abstract Satellite‐based precipitation products (SPPs) have gained popularity among researchers due to their utility in hydrologic studies. Several gridded satellite‐based precipitation products with global coverage, such as the Integrated Multi‐satellitE Retrievals for GPM (IMERG) and the Precipitation Estimation from Remotely Sensed Information using
Vu Dao   +5 more
wiley   +1 more source

Individual Tree Position Extraction and Structural Parameter Retrieval Based on Airborne LiDAR Data: Performance Evaluation and Comparison of Four Algorithms

open access: yesRemote Sensing, 2020
Information for individual trees (e.g., position, treetop, height, crown width, and crown edge) is beneficial for forest monitoring and management.
Wei Chen, Haibing Xiang, Kazuyuki Moriya
doaj   +1 more source

Spatial distribution of urban basic education resources in Shanghai: Accessibility and supply-demand matching evaluation

open access: yesOpen Geosciences, 2023
This article focuses on Shanghai as a case study and utilizes various factors such as points of interest, nighttime lights, land use, road networks, and Digital Elevation Model to examine the spatial distribution of population.
Yuan Hongfu, Yang Xiangguo
doaj   +1 more source

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