Discussion of "Types I, II, III, and IV Stilling Basin Performance for Stepped Chutes Applied to Embankment Dams" by Sherry L. Hunt and Kem C. Kadavy.

The dimensionless mean pressure heads (i.e., HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>H</mi><mi>p</mi></msub><mo stretchy="false">/</mo><msub><mi>d</mi><mn>2</mn></msub></mrow></math> ht or HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>P</mi><mi>m</mi></msub></mrow></math> ht ) along the stilling basin with various slopes decrease first and then start to increase in the flow direction until it reaches a constant value of 1.0. Especially, Eq. (9) can exhibit a good agreement of the mean pressure distribution when only the sequent flow depth HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>d</mi><mn>2</mn></msub></mrow></math> ht is known. 1(a), both the mean pressure head HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>H</mi><mi>p</mi></msub></mrow></math> ht and the streamwise position HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>x</mi></mrow></math> ht are normalized with the critical flow depth HT <math display="inline" overflow="scroll" xmlns="http://www.w3.org/1998/Math/MathML"><mrow><msub><mi>d</mi><mi>c</mi></msub></mrow></math> ht . [Extracted from the article]