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The Fish Passage Extension for ArcGIS 10.4 (FIPEX) with the Dendritic Connectivity Index (DCI) is a toolset for assessing the individual and cumulative effects of watercourse obstacles on the connectivity of river systems. FIPEX offers the ability to quantitatively assess the effects of real or anticipated barriers.
The following are the main features:

1. Summarize river quantity affected by one or many barriers, where habitat affected may be defined as: a) habitat immediately upstream of a barrier (until the next barrier or headwaters) b) habitat immediately downstream of a barrier (until the next barrier or headwaters)