bedload_SJ

Calculates the bedload transport capacity based on the formula by Smart and
Jaeggi (1983). This formula is recommended for slopes between 0.005 and 0.2.

The 'hydReng' package provides a set of functions for hydraulic engineering tasks and natural hazard assessments. It includes basic hydraulics (wetted area, wetted perimeter, flow, flow velocity, flow depth, and maximum flow) for open channels with arbitrary geometry under uniform flow conditions. For structures such as circular pipes, weirs, and gates, the package includes calculations for pressure flow, backwater depth, and overflow over a weir crest. Additionally, it provides formulas for calculating bedload transport. The formulas used can be found in standard literature on hydraulics, such as Bollrich (2019, ISBN:978-3-410-29169-5) or Hager (2011, ISBN:978-3-642-77430-0).

Galatioto Niccolo

hydReng

Hydraulic Engineering Tools

Bühlmann Marius

 HOLINGER AG

bedload_SJ function

<dl><dt>d30</dt>
<dd>Grain size distribution parameter [m].</dd>
<dt>dm</dt>
<dd>Median grain size [m].</dd>
<dt>d90</dt>
<dd>Grain size distribution parameter [m].</dd>
<dt>J</dt>
<dd>Bottom slope [-].</dd>
<dt>Rs</dt>
<dd>Hydraulic radius [m].</dd>
<dt>um</dt>
<dd>Mean flow velocity [m/s].</dd>
<dt>B</dt>
<dd>Bottom width [m].</dd>
<dt>t_crit</dt>
<dd>Critical shear stress [-] (default: 0.05).</dd>
<dt>rho_s</dt>
<dd>Density of bedload material [kg/m3] (default: 2650).</dd>
<dt>s_value</dt>
<dd>Relative solid density [-] (default: 2.65).</dd></dl>

Arguments

Bedload Transport Capacity (Smart and Jaeggi) — bedload_SJ

<dl>

<dt>d30</dt>
<dd>Grain size distribution parameter [m].</dd>


<dt>dm</dt>
<dd>Median grain size [m].</dd>


<dt>d90</dt>
<dd>Grain size distribution parameter [m].</dd>


<dt>J</dt>
<dd>Bottom slope [-].</dd>


<dt>Rs</dt>
<dd>Hydraulic radius [m].</dd>


<dt>um</dt>
<dd>Mean flow velocity [m/s].</dd>


<dt>B</dt>
<dd>Bottom width [m].</dd>


<dt>t_crit</dt>
<dd>Critical shear stress [-] (default: 0.05).</dd>


<dt>rho_s</dt>
<dd>Density of bedload material [kg/m3] (default: 2650).</dd>


<dt>s_value</dt>
<dd>Relative solid density [-] (default: 2.65).</dd>

</dl>

bedload_SJ: Bedload Transport Capacity (Smart and Jaeggi)

Description

Usage

Value

Arguments

References

Examples