These datasets are collected using the methodology as described by Moore et al. The purpose of this survey method is to inventory the applicable aspects of the riparian environment as they relate to fish habitat. The data is meant to be used as a means of determining habitat distribution and quality. It has been used successfully in the preparation of restoration plans, assessment of fish production and survival potential, and the determination of management priorities. It is important to remember that the data contained in AIP datasets reflect the condition of the stream at the time of the survey.
Streams are dynamic systems that change with every high or low flow event.
Substrate and woody debris move through the system, trees fall into the stream causing changes in flow and habitat type. Pools are formed and filled in annually. It is the purpose of the survey to document the condition of the stream at the time of the survey. This data may be used later for comparison and management planning work. The reach dataset generalizes the habitat units that are surveyed by the crew.