anlz_tdlcrkindic: Analyze tidal creek water quality indicators

In tbep-tech/tbeptools: Data and Indicators for the Tampa Bay Estuary Program

Analyze tidal creek water quality indicators

Description

Estimate tidal creek water quality indicators to support report card scores

Usage

anlz_tdlcrkindic(tidalcreeks, iwrraw, yr = 2024, radar = FALSE)

Arguments

tidalcreeks	sf object for population of tidal creeks
iwrraw	FDEP impaired waters rule data base as data.frame
yr	numeric for reference year to evaluate, scores are based on the planning period beginning ten years prior to this date
radar	logical indicating if output is for show_tdlcrkradar, see details

Details

Annual geometric means for additional water quality data available at each wbid, JEI combination. Florida trophic state index values are also estimated where data are available.

Nitrogen ratios are estimated for JEIs that cover source (upstream, freshwater) and tidal (downstream) WBIDs, defined as the ratio of concentrations between the two (i.e., ratios > 1 mean source has higher concentrations). Nitrogen ratios for a given year reflect the ratio of the median nitrogen concentrations when they were measured in both a source and tidal segment during the same day. Note that a ratio of one can be obtained if both the source and tidal segments are at minimum detection.

Indicators for years where more than 10\

If radar = TRUE, output is returned in a format for use with show_tdlcrkradar Specifically, results are calculated as the percentage of years where an indicator exceeds a relevant threshold. This only applies to the marine WBIDs of the tidal creeks (Florida DEP class 2, 3M). Six indicators are returned with percentage exceedances based on total nitrogen (tn_ind) greater than 1.1 mg/L, chlorophyll (chla_ind) greater than 11 ug/L, trophic state index (tsi_ind) greater than 55 (out of 100), nitrate/nitrite ratio between marine and upstream segments (nox_ind) greater than one, chlorophyll and total nitrogen ratios > 15, and percentage of years more where than ten percent of observations were below DO percent saturation of 42.

Value

A data.frame with the indicator values for each tidal creek

Examples

dat <- anlz_tdlcrkindic(tidalcreeks, iwrraw, yr = 2024)
head(dat)

tbep-tech/tbeptools documentation built on April 13, 2025, 4:50 p.m.