Habitat Mapping of Klamath River Corridor - California

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GHD was commissioned by the Yurok Tribe to improve habitat mapping of the Tribe’s 64,000 acre reservation, which is located along the Klamath River in far northern California. The primary goal was to develop GIS layers that would better enable wildfire risk modelling and to provide an improved basis for habitat conservation planning and forestry practices.

GHD utilised a combination of remote sensing, GIS and field sampling activities to produce a customised vegetation model and habitat classification map. This included an analysis of LiDAR in the context of canopy height, regional geologic and soil data, existing vegetation data, and field validation. An unsupervised spectral classification of 4-band orthoimagery was undertaken to partition the study area into stratified clusters of presumed vegetation categories. Target vegetation classes were then identified via local ecological knowledge, including input from ecologists, timber managers and Tribal members. The result was a preliminary vegetation class model and base map that was used to conduct stratified field sampling for confirmation and training of the model.

With the help of Yurok Tribe members, the ecology team accessed field validation locations to determine the accuracy and precision of the preliminary model and map. Floristic data from fieldwork was fed into a supervised classification analysis that incorporated both spectral and textural correlative cues.

Spatial Sciences

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GHD's award winning spatial sciences team uses Geographic Information System (GIS) technology to acquire, compile, manipulate, interpret and visualise data to reveal geographic patterns and relationships. By bringing together large volumes of disparate data, decisions that were once largely based on guess work, become more quantitative and can be powerfully presented using map-based tools.

GHD has a reputation for innovation. We can be involved at all stages of delivery - from planning and project management, through to data acquisition, processing, modelling, reporting, map production and web deployment.

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