Turbidity regimes vary dramatically among small streams in north coastal California. In an analysis of turbidity data from 27 small streams in the region, turbidity at the 10-percent exceedence level ranged from 3 to 116 formazin nephelometric units (FNU) for the 2005 wet season, translating to 1.7 to 65 days above an oft-cited biological threshold of 25 FNU. Watersheds draining to the streams ...

The World Bank estimates the value of the global illegal timber trade at more than $10 billion per year. Tracking the timber supply chain is poor and allows widespread illegal logging, log smuggling and log laundering, it believes. Timber taken from remote forests in Asia, Russia, South America and Africa is often shipped long distances and its only certification is a paper trail that is highly...

Timber building has gained more and more attention worldwide due to it being a generic renewable material and having low environmental impact. It is widely accepted that the use of timber may be able to reduce the embodied energy of a building. However, the development of timber buildings in China is not as rapid as in some other countries. This may be because of the limitations of building reg...

in this research, the structural behavior of timber and concrete sleepers in a standard railway turnout is evaluated, in the case of raising speed. in approaching this evaluation, current practices in the structural analysis of sleepers are surveyed and then, the sensitivity analysis with abaqus software is made based on selected criteria (bending and shear stresses as well as contact pressure)...

Climate change may impact forest management activities with important implications for forest ecosystems. However, most climate change research on forests has focused on climate-driven shifts in species ranges, forest carbon, and hydrology. To examine how climate change may alter timber harvesting and forest operations in north temperate forests, we asked: 1) How have winter conditions changed ...

The European Union (EU), the United States of America (USA), and Australia have adopted specific measures to avoid the placing of illegal timber on their markets. These measures might encourage the diversion of timber products from traditional large importers to destinations with a less stringent regulatory framework. During 2001–2013, the international trade in tropical primary timber products...

In Norway, young pine trees serve as important winter browse for moose. In a model that simultaneously optimizes rotation length and moose management, moose density and harvest are set to trade off hunting values and timber damage, and adjust to changes in forage availability as the forest is logged. Simultaneously, logging times are chosen to maximize both timber and hunting values. Two possib...

A hybrid data collection method involving primary and secondary data is used to develop a regional computable general equilibrium model. The region-specific computable general equilibrium follows the Johansen solution technique and is used to simulate the potential economic impacts resulting from a Mountain Pine Beetle infestation in the Northern Interior Forest Region of British Columbia, Cana...

Vibrations induced by people walking is one of the most important issue in timber floor design. Low natural frequency and low mass require a careful analysis in order to prevent significant annoyance and to guarantee an acceptable human comfort. This paper is concerned with the assessment of vibration performance of a timber-concrete composite timber floor and a cross laminated timber floor use...

This study assessed the economic impact of the potential reduction of timber supply to the local forest industry and the local economy from a proposed reservoir in Northeast Texas --Marvin Nichols I Reservoir. The study first evaluated the forested acres at the reservoir site and those under habitat mitigation requirements, providing a foundation for timber supply impact assessment. Then, the t...