alpha_beta | R Documentation |
Calculates pairs of alpha (level of development) and beta (ratio of storage and volume of annual flow) characteristics of the reservoir for given reliabilities.
alpha_beta(reser, alphas, max_beta, reliability, ...)
## S3 method for class 'wateres'
alpha_beta(reser, alphas = seq(0, 1, 0.02),
max_beta = 2, reliability = "max", ...)
reser |
A |
alphas |
A vector of alpha values, i.e. coefficients by which mean annual flow will be multiplied. Usually the interval between 0 and 1 is used. |
max_beta |
A maximum value of calculated beta to be considered, greater values will be ignored. |
reliability |
A vector of reliability values passed to the |
... |
Further arguments passed to the |
An error occurs if the range given by upper_limit
does not contain the given value of reliability. In that case, try to increase
the upper_limit
argument.
A wateres_alpha_beta
object which is a data.table consisting of:
alpha |
level of development, given as the |
beta |
ratio of storage representing the given reliability and volume of mean annual flow |
reliability |
given reliability values (may differ from reliabilities calculated by |
plot.wateres_alpha_beta
for plotting the results, sry.wateres
for calculation of a reservoir storage for the
given yield and reliability
reser = data.frame(
Q = c(0.078, 0.065, 0.168, 0.711, 0.154, 0.107, 0.068, 0.057, 0.07, 0.485, 0.252, 0.236,
0.498, 0.248, 0.547, 0.197, 0.283, 0.191, 0.104, 0.067, 0.046, 0.161, 0.16, 0.094),
DTM = seq(as.Date("2000-01-01"), by = "months", length.out = 24))
reser = as.wateres(reser, storage = 14.4e6, area = 754e3)
alpha_beta = alpha_beta(reser)
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