نتایج جستجو برای: fluvial environment

تعداد نتایج: 521898  

2006
Jonathan D. Phillips

Submitted to the Texas Water Development Board 2 PREFACE This report is submitted in fulfillment of contract no. 2005-483-564 between the Texas Water Development Board and Jonathan Phillips (doing business as Copperhead Road Geoscience). The report is presented in two more-or-less independent parts, reflecting the Scope of Work for the project. The first is a review and evaluation of geomorphic...

2017
Ericka C. Souza Oliveira Rogerio Ribeiro Marinho

The Amazon river is subject to major geomorphological changes between the hydrologic periods of flood and dry. Such changes can be mapped and detected by remote sensing techniques. In this context, this research had as objective to evaluate the dynamics of this great fluvial system, in the stretch between the cities of Manaus and Itacoatiara, in the period of 20 years. The results showed the pr...

Journal: :International Journal of Geographical Information Science 2005
Carl Legleiter Michael F. Goodchild

Improved techniques are needed to characterize complex fluvial systems and monitor ecologically important, yet highly vulnerable riverine environments. This paper explores potential alternatives to traditional mapping of in-stream habitat and presents fuzzy set theory as a means of departing from the rigid, Boolean, object-based framework. We utilize hydrodynamic modeling, remotely sensed data,...

2008
A. Valenciano A. Pacifici

Introduction: The recent observations about different waterand ice-related features on Nepenthes region of Mars [1] [2] [3], and the evidence of changes on the Oceanus Borealis’ water level on this region [4] [5] inspired the work here presented. What are exactly the water-related landforms (glacial, periglacial, fluvial, etc) existing in this region of Mars? How are they spatially distributed?...

2005
Jon B. Hinwood Errol J. McLean

Hinwood, J.B. and McLean, E.J., 2000. Monitoring and modelling tidal regime changes following inlet scour. Journal of Coastal Research. Royal Palm Beach (Florida), ISSN J. Coastal Research, Special Publn. 34, pp 449-458, 2001 Entrance closure has been identified by the local coastal communities as one of the more important management problems for the small barrier estuaries. The paper describes...

2004
Sergio Fagherazzi Alan D. Howard Patricia L. Wiberg

[1] A numerical model has been developed to predict the evolution and degree of incision and deposition by fluvial channels on the continental shelf during sea level cycles. Rainfall-runoff, mass wasting processes, and fluvial sediment entrainment and transport are simulated using the detachment-limited model of Howard [1994] on a grid that represents the morphology of the continental shelf and...

2013
Denise Burchsted Melinda Daniels Ellen E. Wohl

Available online 10 April 2013 Fluvial systems include natural and human-created barriers that modify local base level; as such, these discontinuities alter the longitudinal flux of water and sediment by storing, releasing, or changing the flow path of those materials. Even in the absence of distinct barriers, fluvial systems are typically discontinuous and patchy. The size of fluvial discontin...

2006
S. C. Schon K. L. Tanaka Warrego Valles

Introduction: This investigation focused on Warrego Valles, a region of well-developed valley systems located in Thaumasia Planum of the southern highlands at ~42°S, 267°E. Some previous workers interpreted the valley systems in this area as being of fluvial origin [1-3], while others focused on sapping [4-6] or hydrothermal activity [7-10] as formative mechanisms. It is clear that no single mo...

Journal: :Remote Sensing 2021

The present work aims to demonstrate how machine learning (ML) techniques can be used for automatic feature detection and extraction in fluvial environments. use of photogrammetry algorithms has improved the understanding both environmental anthropic issues. developed methodology was applied considering acquisition multiple photogrammetric images thanks unmanned aerial vehicles (UAV) carrying m...

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