water_balance.default: Calculates the water balance using the method proposed by...

In jvitorpinto/agmet: Utilities for agricultural meteorology

Calculates the water balance using the method proposed by Thornthwaite & Mather.

Description

Calculates the water balance using the method proposed by Thornthwaite & Mather.

Usage

## Default S3 method:
water_balance(
  p,
  pet,
  taw,
  aw_initial = taw,
  max_iter = 256,
  max_error = 0,
  sequential = FALSE
)

Arguments

p	precipitation
pet	potential (maximum) evapotranspiration
taw	total available soil water
aw_initial	soil water content at the beginning of calculations.
max_iter	the maximum number of iterations to perform until it stops (see details). Only valid if sequential is set to FALSE.
max_error	the maximum allowed difference between the previous and the current calculation (see details). Only valid if sequential is set to FALSE.
sequential	whether it will calculate a sequential or a cyclical water balance

Details

The function iterates over each value of p-pet calculating the available soil water (aw) at each step. If sequential is set FALSE and the last value of p-pet is reached, the function returns to the first value of p-pet and calculates a new value for aw. The new aw is compared to the aw calculated previously. It will stop only when the new aw is equal to the old aw, or when the number of iterations exceeds max_iter or the difference between the new aw and the old aw is lesser than max_error. If sequential is set TRUE, then max_error and max_iter values are irrelevant.

jvitorpinto/agmet documentation built on Jan. 30, 2023, 6:33 a.m.