ABSTRACT:

The dataset contains isotopic carbon, nitrogen, %C and %N in plants in GIRF bioretention. Plants in bioretention systems were harvested in May 2015 and analyzed by Oct 2015. % C and % N were analyzed in root and shoot samples. Upland contains native Utah’s vegetation, and wetland systems have wetland vegetation dominant in wetland systems. To determine C and N in plant biomass, each plant was divided into roots and shoots and dried in an oven to the constant mass at 40oC for 48 hours. CN samples were run on Thermo-Electron Delta IRMS configured through Thermo/Finnigan CONFLO III. d15N & d13C was analyzed using a Carlo Erba NC2100 elemental analyzer. Wetland 7 and Upland 8 does not have root data as the plants in these bioretention units were not harvested.

ABSTRACT:

Soil pH was measured on a 1:5 (v/v) soil water suspension with a digital pH meter (Mettler Toledo FG-2 FiveGo Portable pH Meter). The dataset contains soil pH over a three years period from August 30, 2013, to December 6, 2015. We decommissioned three older treatments and three newer (upland, control, and wetland- 1-6) in May 2015. Therefore, we only have data from three bioretention cells from May onwards.

ABSTRACT:

This dataset contains Total Nitrogen and Total Carbon in nine bioretention cells over a period of three years. Composite soil samples from each garden were collected once every year in October.
Total Nitrogen/Carbon was determined by the combustion method based on Dumas method(1). The instrument used for analyzing is Elementar Vario Max Cube.
Units are in percentage which is the percent of the total mass.

Details on GIRF bioretention and schematic is attached.

1. Total Nitrogen and Carbon by Combustion In Soil, Plant and Water Reference Methods for the Western Region (WREP 25). 2005. 3rd Edition. R. Gavlak, D. Horneck, R. O. Miller. pp. 116-117.

ABSTRACT:

The dataset contains soil moisture data in three GIRF bioretention cells at different depths (10cm, 20cm, and 50cm). Soil moisture was measured using CS616-L soil moisture sensors (Campbell Scientific, Logan, UT). The data loggers were placed at the center of each bioretention at 10 cm, 20 cm, and 50 cm depth in upland and control cells. In the wetland, the data loggers were placed at 25cm and 50cm. Data was collected every 15 minutes and were averaged over a day. Data were recorded from Jan 2012 to May 2015. The unit is in percentage.

Details on GIRF bioretention and schematic is attached.