Description Usage Arguments Details Value References Examples

Streamflow depletion in partially penetrating stream with semipervious streambed.

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`t` |
times you want output for [T] |

`d` |
distance from well to stream [L] |

`S` |
aquifer storage coefficient (specific yield if unconfined; storativity if confined) |

`Kh` |
aquifer horizontal hydraulic conductivity [L/T] |

`b` |
aquifer saturated thickness [L] |

`Kriv` |
streambed semipervious layer hydraulic conductivity [L/T] |

`briv` |
streambed semipervious layer thickness [L] |

`prec` |
precision for mpfr package for storing huge numbers; 80 seems to generally work but tweak this if you get weird results. |

This function is described in Hantush (1965). As the leakance term `(b*Kh/Kriv)`

approaches 0 this is equivalent to glover. It contains numerous assumptions:

Horizontal flow >> vertical flow (Dupuit assumptions hold)

Homogeneous, isotropic aquifer

Constant

`Tr`

: Aquifer is confined, or if unconfined change in head is small relative to aquifer thicknessStream is straight, infinitely long, and remains in hydraulic connection to aquifer

Constant stream stage

No changes in recharge due to pumping

No streambank storage

Constant pumping rate

Aquifer extends to infinity

A numeric of `Qf`

, streamflow depletion as fraction of pumping rate [-].
If the pumping rate of the well (`Qw`

; [L3/T]) is known, you can calculate volumetric streamflow depletion [L3/T] as `Qf*Qw`

Hantush, MS (1965). Wells near Streams with Semipervious Beds. Journal of Geophysical Research 70(12): 2829-38. doi:10.1029/JZ070i012p02829.

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