Compute all hydraulic data using Manning-Strickler equations

Calculate rivers depth (\(H\)) and water travel time (\(TPS\)) with Discharge as input data, using Manning-Strickler. River width (Bm) needs to be computed with another TnetHydraulic function.

Usage

TnetHydraulic_ManningStrickler(
  path_data,
  shapefile,
  export_files = c("H", "TPS")
)

Arguments

path_data

Path to the folder containing Q and Bm data

shapefile

Path to the shapefile with all info on segments. Columns needed are detailed in the Shapefile columns section.

export_files

vector of files that will be exported. It can contain "H", "CV" and "TPS", but only "H" and "TPS" are needed for T-NET

Value

All hydraulic data as NetCDF files in the folder path_data

Equations

River segment depth (\(H\))

$$H = \left(\frac{Qaval}{Bm\cdot K \cdot \sqrt{Slope}}\right)^{\frac{3}{5}}$$

with \(K\) = Strickler coeficient

Water speed in river segment (\(CV\))

$$CV = \frac{Qaval}{H \cdot Bm}$$

Water travel time in river segment (\(TPS\))

$$TPS = \frac{Longueur\_m}{CV} \div 3600$$

Shapefile columns

\(gid\_new\)	ID of the river segment (named gid)
\(pente2\)	Slope of the river segment
\(Longueur_m\)	Length of the river segment