Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 22 for “"forest roads"”.
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MULTISCALE EFFECTS OF FOREST ROADS ON BLACK BEARS (URSUS AMERICANUS)
As the vast network of roads continues to expand across the continent, so too does the necessity to understand the associated ecological effects. To appropriately assess the impacts of these roads on wildlife it is necessary to evaluate how they affect ecological processes at multiple spatial and …
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MULTISCALE EFFECTS OF FOREST ROADS ON BLACK BEARS (URSUS AMERICANUS)
As the vast network of roads continues to expand across the continent, so too does the necessity to understand the associated ecological effects. To appropriately assess the impacts of these roads on wildlife it is necessary to evaluate how they affect ecological processes at multiple spatial and …
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Sediment Delivery from Reopened Forest Roads at Stream Crossings in the Virginia Piedmont Physiographic Region, USA
… to control surface runoff and erosion from forest roads at stream crossings are critical for the protection of aquatic ecosystems in forests. In this research, annual and event-based sediment delivery rates were estimated for reopened legacy roads at forest stream crossings in the Virginia …
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ΜΙΑ ΠΡΟΤΑΣΗ ΓΙΑ ΝΕΕΣ ΠΡΟΔΙΑΓΡΑΦΕΣ ΜΕΛΕΤΗΣ ΔΑΣΙΚΩΝ ΔΡΟΜΩΝ
THE CLASSIFICATION AND DENSITY OF FOREST ROADS IN GREECE IS DISCUSSED IN THIS DOCTORAL THESIS TOGETHER WITH SOME OTHER RELATIVE TOPICS, AS: DETERMINATION OF THE PARAMETERS AND THE RELATION ESTIMATES OF THE CHARACTERISTIC SIZE OF THE CROSS- SECTION. STUDY OF THE SIGHT DISTANCE PROBLEM GIVING TABLES …
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Modeling the Effects of Forest Road Density on Streamflow in the Blue Ridge Mountains
Forested watersheds have often been managed for flood mitigation. Studies have shown that forests have the potential to minimize peak flows during storm events, yet the relationship between forests and flooding is inexact. Forest roads, usually found in managed systems, can potentially magnify the …
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Evaluation of Best Management Practices for Bladed Skid Trail Erosion Control and Determination of Erosion Model Accuracy and Applicability
… disturbed areas, such as skid trails, haul roads, and log landings. Erosion from silvicultural activities not only has the potential to introduce sediment into waterways but can also decrease site productivity through the removal of topsoil. In order to minimize erosion from silvicultural …
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Barrier Effects Of Roads And Traffic On Animal Occurrence, Space Use, And Movements
… caused by linear infrastructure, including roads, railways, and power line corridors, are recognized as major threats to biodiversity around the world. Roads can act as barriers by impeding animal movement and restricting animal space use. An understanding of factors that influence barrier …
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Skid Trail Stream Crossing Closure Techniques for Protecting Water Quality
The impact of forest roads and skid trails on stream health is being increasingly scrutinized. Forest roads and skid trails have repeatedly been identified as forest operations having the greatest potential to produce sediment by way of non-point source pollution. The stream crossing portion of a …
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Evaluación de procesos de erosión en pistas forestales no pavimentadas: (Sistema Ibérico noroccidental, La Rioja)
… without the construction of a dense network of forest road in the world that has caused a great variety of environmental impacts, a lot of them negative, specially geomorphological impacts. Road building in mountain areas has a notable geomorphological impact. Several factors like: the breaking …
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Soil Erosion from Forest Haul Roads at Stream Crossings as Influenced by Road Attributes
Forest roads and stream crossings can be important sources of sediment in forested watersheds. The purpose of this research was to compare trapped sediment and forestry best management practice (BMP) effectiveness from haul road stream crossing approaches and ditches. The three studies in this …
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The Effects of Stream Crossings and Associated Road Approaches on Water Quality in the Virginia Piedmont
Stream crossings are an integral component of forest road systems that provide access for timber harvesting and silvicultural activities. Stream crossings and their associated approaches are often the most critical point of concern for water quality along forest roads. Several types of crossings …
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Fire and Road Disturbance Impacts on Forest Plant Species and Seed Rain in Table Mountain Fire Arai, Kittitas County, Washington
Forest communities are in a constant state of change. Disturbance events can alter the physical landscape and create conditions favorable to some species while negatively impacting others. Fire has been a natural, reoccurring source of disturbance in Pacific Northwest forests. Over the past …
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A Methodology for Planning Road Best Management Practices Combining WEPP: Road Erosion Modeling and Simulated Annealing Optimization
Erosion from forest roads is a known problem in mountainous terrain. To abate these negative consequences, physical Best Management Practices (BMPs) are implemented, sometimes with no knowledge of erosion hot spots. With the need to minimize water quality impacts while at the same time accounting …
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A Methodology for Planning Road Best Management Practices Combining WEPP: Road Erosion Modeling and Simulated Annealing Optimization
Erosion from forest roads is a known problem in mountainous terrain. To abate these negative consequences, physical Best Management Practices (BMPs) are implemented, sometimes with no knowledge of erosion hot spots. With the need to minimize water quality impacts while at the same time accounting …
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Effectiveness of State Developed and Implemented Forestry Best Management Practices in the United States
… Control Act of 1972 required states to develop forestry BMPs to help reduce potential nonpoint source pollution from forest operations. Properly applied forestry best management practices (BMPs) have since been proven to protect water quality from forest operations. This research project …
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Effectiveness, cost, and implications of forest haul road stream crossing structures and best management practices in Virginia
Forest roads and stream crossings have the potential to be sources of sediment from forest operations. Recent litigation has renewed interest in furthering research related to forest road Best Management Practices (BMPs). Three legacy (100 year old) forest road stream crossings were monitored for …
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A Holistic Analysis for Spatiotemporal Interdependencies of Deforestation, Forest Degradation and Landslide Susceptibility in NE Iran
Various biotic and abiotic agents are changing forests. Prolonged human activities substantially could cause not only different changes in forests but also could accelerate natural hazards in the Anthropocene. Despite several remote sensing-based research in forest changes, there is a need for a …
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Uso do modelo WEPP (Water Erosion Prediction Project) modificado para estimar taxas de erosão em estradas florestais
Este trabalho teve como objetivo geral determinar o volume total de água escoada e a produção de sedimentos provenientes de segmentos de estradas florestais submetidas às condições de chuva natural e, com esses resultados, validar o modelo WEPP por meio de comparações entre dados observados e dados …
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