online_scour_melville:   Pier and abutment scour using the Melville equation (1997)

ds = KyW KI Kd Ks Kθ KG

For abutment: KyW = KyL

For pier: KyW = Kyb

Reference

INPUT DATA:

1. Stream/river [optional]:

2. Select:

 SI units (metric)
[SI units (metric) only].

3.  LEFT ABUTMENT

3a.  Length of left abutment Ll (m) [Click to enlarge]:

3b.  Shape of left abutment [Click to enlarge]:

 Vertical wall Wing wall Spill through 0.5:1 (H:V) Spill through 1:1 (H:V) Spill through 1.5:1 (H:V)

3c.  Angle of alignment of left abutment θlo [0o ≤ θl ≤ 150o]:

3d.  Does the left abutment extend to the main channel?:

 Yes No

4.  RIGHT ABUTMENT

4a.  Length of right abutment Lr (m) [Click to enlarge]:

4b.  Shape of right abutment [Click to enlarge]:

 Vertical wall Wing wall Spill through 0.5:1 (H:V) Spill through 1:1 (H:V) Spill through 1.5:1 (H:V)

4c.  Angle of alignment of right abutment θro [0o ≤ θl ≤ 150o]:

4d. Does right abutment extend to the main channel?:

 Yes No

5.  FLOW DEPTH

5a.  Flow depth in the main channel y (m) [Click figure below to enlarge]:

5b.  Flow depth in the flood channel y* (m) [Click figure below to enlarge]:

6.  FLOW VELOCITY

6a.  Flow velocity in the main channel V (m/s):

6b.  Flow velocity in the flood channel V* (m/s):

7.  PIER DATA

7a.  Shape of pier [Click figure below to enlarge]:

 Circular cylinder Round nosed Square nosed Sharp nosed

7b.  Width of pier b (m) [Click figure below to enlarge]:

7c.  Length of pier l (m) [Click figure below to enlarge] [leave blank if circular pier]:

7d.  Angle of alignment of pier θo [0o ≤ θl ≤ 150o]:

7e.  Where is the pier located? [Click figure below to enlarge]:

 Main channel Flood channel

7f.  [Shape of] pier cross-section [in the vertical]:

 Uniform Nonuniform

[If pier is uniform, 7b and 7c are applicable; if pier is nonuniform, 7g is applicable]

7g.  If pier shape is nonuniform [in the vertical], please enter the following data; otherwise, leave blank [Click figure below to enlarge]:

• Height z (m):

• Diameter D (m):

• Diameter D* (m):

8.  DEBRIS CONTAMINATION

8a.  Is pier subject to debris contamination?:

 Yes No

8b.  If pier is subject to debris contamination (answer to input 8a is Yes), please enter the following data [otherwise, leave blank] [Click figure below to enlarge]:

• Thickness Td (m):

• Diameter Dd (m):

9.  SEDIMENT DATA

9a.  Median particle size d50 (m):

9b.  Is the geometric standard deviation of the particle size distribution σg ≤ 1.3?:

 Yes No

9c.  If sediment is nonuniform (answer to input 9b is No), please enter maximum particle size dmax (m) [otherwise, leave blank]:

10.  MANNING n

10a.  Manning roughness coefficient for the main channel, n:

10b.  Manning roughness coefficient for the flood channel, n*:

11.  WIDTH OF THE FLOOD CHANNEL

11a.  If left abutment extends to the main channel, please enter following data [otherwise, leave blank] [Click figure below to enlarge]:

• Left width of the flood channel Ll*:

11b.  If right abutment extends to the main channel, please enter following data [otherwise, leave blank] [Click figure above to enlarge]:

• Right width of the flood channel Lr*:

• OUTPUT:

 No data.

Your request was processed at  05:08:49 pm on June 25th, 2019   [ 190625  17:08:49 ].

Thank you for running   online_scour_melville   [181204 12:00]