Explanation of the Bank Erosion Hazard Index Exercise

Exercise Objective

Exercise Explanation

1. BEHI index numbers for the E4 channel are as follows:
   • Bank height to Bankfull height index of 6.0
   • Root depth to bank height ratio index of 5.9
   • Root density index of 2.0
   • Bank angle index 4.0
   • Surface protection index 4.0
   • Cobble bank material subtract 10 points

2. Total BEHI Score is 21.9 - 10.0 = 11.9
3. Hazard of Risk Ranking is Low. If the cobble had been absent, or sand and gravel occupied more than 50% of the substrate, then the rating would have been Moderate.

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