From e3bc264df69f892e9ad990be22d3ec1b22041daa Mon Sep 17 00:00:00 2001
From: Johannes Ranke <jranke@uni-bremen.de>
Date: Wed, 17 Jun 2020 13:37:59 +0200
Subject: TSCF estimation equations, update docs

Briggs et al. (1982) and Dettenmaier et al. (2009)
---
 man/TSCF.Rd | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 man/TSCF.Rd

(limited to 'man/TSCF.Rd')

diff --git a/man/TSCF.Rd b/man/TSCF.Rd
new file mode 100644
index 0000000..e4cefdc
--- /dev/null
+++ b/man/TSCF.Rd
@@ -0,0 +1,37 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/TSCF.R
+\name{TSCF}
+\alias{TSCF}
+\title{Estimation of the transpiration stream concentration factor}
+\usage{
+TSCF(log_Kow, method = c("briggs82", "dettenmaier09"))
+}
+\arguments{
+\item{log_Kow}{The decadic logarithm of the octanol-water partition constant}
+
+\item{method}{Short name of the estimation method.}
+}
+\description{
+The FOCUS groundwater guidance (FOCUS 2014, p. 41) states that a reliable measured
+log Kow for neutral pH must be available in order to apply the Briggs
+equation. It is not clarified when it can be regarded reliable, but the
+equation is stated to be produced for non-ionic compounds, suggesting that
+the compound should not be ionogenic (weak acid/base)
+or ionic.
+}
+\details{
+The Dettenmaier equation is given to show that other views on the subject exist.
+}
+\examples{
+plot(TSCF, -1, 5, xlab = "log Kow", ylab = "TSCF", ylim = c(0, 1.1))
+TSCF_2 <- function(x) TSCF(x, method = "dettenmaier09")
+curve(TSCF_2, -1, 5, add = TRUE, lty = 2)
+legend("topright", lty = 1:2, bty = "n",
+  legend = c("Briggs et al. (1982)", "Dettenmaier et al. (2009)"))
+}
+\references{
+FOCUS (2014) Generic Guidance for Tier 1 FOCUS Ground Water Assessments.
+ Version 2.2, May 2014
+Dettenmaier EM, Doucette WJ and Bugbee B (2009) Chemical hydrophobicity and uptake
+by plant roots. Environ. Sci. Technol 43, 324 - 329
+}
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