Selecting and testing an instrument for surveying stream shade

Teti, Patrick; Pike, Robin

doi:10.22230/jem.2005v6n2a310

Cited by 4 publications

(1 citation statement)

References 20 publications

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“…The Solar Pathfinder is a popular instrument that extends the concept of ACD by quantifying shade along the sun's path as a function of time of day and date. Teti and Pike (2005) compared a number of instruments and methods for estimating ACD, including the Solar Pathfinder.…”

Section: Defining Metrics Of Stream Thermal Regime and Its Controllin...mentioning

confidence: 99%

JAMES BUTTLE REVIEW: Quantifying the influence of forestry and forest disturbance on stream temperature: Methodologies and challenges

Moore,

MacDonald

2024

Hydrological Processes

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Stream temperature governs many aquatic ecosystem processes and plays a key role in determining the distribution of cold‐water amphibians and cool‐ and cold‐water fish, including salmonids. Decades of research have focused on the effects of forestry and forest disturbance on stream temperature, and new projects are underway or being planned in jurisdictions including the Provinces of Alberta and British Columbia, Canada, and Washington State, USA. The objective of this paper is to provide a critical review of methodologies employed in previous studies. The review initially focuses on the range of metrics used to quantify stream thermal regimes and the factors that control stream temperature variability in time and space, then focuses on sampling and analytical methodologies used to quantify stream temperature response to forestry activity and forest disturbance. Empirical methods include sampling in time, space, or both, and may or may not include pre‐ and post‐harvest data. Process‐based mechanistic and hybrid empirical‐mechanistic models have also been applied. The advantages and disadvantages of these approaches are discussed, and recommendations provided to support the design and execution of future studies.

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Section: Defining Metrics Of Stream Thermal Regime and Its Controllin...mentioning

confidence: 99%

JAMES BUTTLE REVIEW: Quantifying the influence of forestry and forest disturbance on stream temperature: Methodologies and challenges

Moore,

MacDonald

2024

Hydrological Processes

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A tool for assisting municipalities in developing riparian shade inventories

Guzy

Richardson

Lambrinos

2015

Urban Forestry & Urban Greening

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A Direct Approach for Quantifying Stream Shading

Clark

Johnson

Hardegree

2008

Rangeland Ecology & Management

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Management and regulatory standards for stream shading have been established to mitigate excessive stream temperature. Existing shade assessment tools, however, are inadequate for monitoring extensive stream networks. Our objectives were to develop and evaluate an efficient, low-cost field technique for sampling stream-surface shading using digital images and to evaluate the efficiencies and effectiveness of eight different digital image analysis techniques for shade assessments. We developed a quadrat-based technique and associated field equipment to directly photograph stream-surface shading. Sampling at random points (pixels) within the resultant digital images was the most accurate, efficient, and robust image analysis technique. An approach pairing the photographic field technique and the random point-sampling image analysis technique should enable managers to conduct ground-based assessments of stream shading over extensive stream networks. This approach may also provide an efficient means of collecting ground truth samples for even broader scale, remote sensing-based streamshade assessments. Resumen Estándares para el manejo y regulación de sombras sobre corrientes de agua han sido establecidos para mitigar las temperaturas excesivas en las mismas. Las herramientas existentes para la evaluación de sombras son, sin embargo inadecuadas para el monitoreo extensivo de las redes de drenaje. Nuestros objetivos fueron desarrollar y evaluar una te´cnica de campo eficiente y de bajo costo para muestrear la sombra sobre la superficie de las corrientes de agua usando imágenes digitales, y evaluar las eficacias y eficiencias de ocho diferentes te´cnicas de análisis de imágenes digitales para las evaluaciones de sombra. Hemos desarrollado una técnica basada en cuadrantes y asociada al equipo de campo para fotografiar directamente la sombra en la superficie de la corriente de agua. Un muestreo de puntos al azar (pixeles) dentro de las imágenes digitales resultantes fue la te´cnica de análisis de imagen más precisa, eficiente, y robusta. Una estrategia combinando la te´cnica fotográfica de campo y la te´cnica robusta de muestreo de puntos al azar con imagines digitales podría permitir a los usuarios llevar a cabo evaluaciones de campo extensivas de las sombras existentes sobre las corrientes de agua. Esta estrategia podría tambie´n proporcionar medios eficientes para recolectar muestras de campo incluso para evaluaciones de sombra a escalas más amplias usando metodologías basadas en sensores remotos.

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Selecting and testing an instrument for surveying stream shade

Cited by 4 publications

References 20 publications

JAMES BUTTLE REVIEW: Quantifying the influence of forestry and forest disturbance on stream temperature: Methodologies and challenges

JAMES BUTTLE REVIEW: Quantifying the influence of forestry and forest disturbance on stream temperature: Methodologies and challenges

A tool for assisting municipalities in developing riparian shade inventories

A Direct Approach for Quantifying Stream Shading

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