A fundamental part of effectively managing a stream is knowing what the problems are and where they exist. A Stream Corridor Assessment uses HDSS techniques to document conditions continuously over long stretches of stream. Stream Corridor Assessments provide large volumes of detailed video and data that is used to support Mitigation Prioritzation, Integrated Planning, and Impact Assessments. The high-definition video of the stream corridor can be linked to a database of information that is easily mapped in GIS software (Figure 1).
Figure 1. HDSS links video, data, and maps in one system. Here you can see a broken pipe crossing a stream. The visual image is more informative than the map or data in this case.
A wide variety of conditions can be classified from the HDSS video like locating large woody debris and log jams (Figure 2), water intakes and poor streambank conditions (Figure 3), or trash (Figure 4) to name a few.
Figure 2. A log jam documented during an HDSS project. These are typically found downstream of unstable streambank areas.
Figure 3. An example of a water intake and poor streambank conditions from an HDSS project. This would be a good location to talk with the landowner about better ways to protect the land from erosion.
An example of trash (tires) observed during an HDSS project. Knowing the location of trash can facilitate stream clean-up efforts.
Application of the Bank Erosion Susceptibility Index (BESI): Bear Creek, Alabama
Bank Condition Analysis for Prioritization: Paint Rock River, Alabama
Baseline Condition Survey: Weogufka Creek, Alabama
Dam Removal Monitoring: Big Canoe Creek, Alabama
Habitat Assessment and Mitigation Accounting: Ala Wai Watershed, Hawaii
High Definition Stream Survey: Harpeth River, TN
High Definition Stream Survey: Choccolocco and Cheaha Creek, Alabama
High Definition Stream Survey: Caney Fork River, TN
High Definition Stream Survey: Falling Water River, TN
Potential Infrastructure Impacts and Mitigation: Turkey Creek, Alabama
Stream Condition Assessment: Timber Run, Maryland
Fish Distribution and Habitat Modeling: Ala Wai Watershed, Honolulu, Hawaii