interp_Q: 'interp_Q' interpolate discharge

In Ryan-Lima/gRandcanyonsand: Analysis of Grand Canyon Sandbar Monitoring sites and flow patterns affecting those sites

Description

This function interpolated discharge between 15-minute discharge measurments. The discharge measurements before and after the chosen time datetime are used to solve for the equation of a line, then that line is used to estimate discharge at the chosen datetime

Usage

interp_Q(dt, time_before, Q_before, time_after, Q_after)

Arguments

dt	lubridate datetime object
time_before	numeric datetime, 15-min discharge measurment before
Q_before	discharge (cfs) associated with time_before in gage_data
time_after	numeric datetime, 15-min discharge measurment after
Q_after	discharge (cfs) associated with time_after in gage_data

Details

y1 <- Q_before y2 <- Q_after x1 <- time_before x2 <- time_after m <- (y2-y1)/(x2 - x1) b <- y1- m*x1 x3 <- as.numeric(dt) y3 <- m * x3 + b

Value

y3 – numeric value, interpolated discharge in cfs

Ryan-Lima/gRandcanyonsand documentation built on Aug. 13, 2021, 7:38 a.m.