Cycles-L WE-38 watershed simulations from 2000 to 2015

This dataset contains the daily output of the Cycles-L Version 1.0.0 model simulations for the WE-38 watershed from 2000 to 2015.

The Cycles-L WE-38 model physical domain consists of 114 segments representing the stream network (average 98-m long) and 883 triangular grids (average 0.83 ha). The rotations and associated field operations described in Hirt et al. (2020) were projected on the Cycles-L WE-38 model domain. Model grids were assigned to one of six land uses: deciduous forest, a corn (2 years)-soybean-corn-hay (4 years) rotation, a corn (4 years)-hay (4 years) rotation, a soybean-corn rotation, a hay rotation, and a corn-soybean-corn-soybean-oat hay-hay (3 years) rotation. The soil texture, organic matter, and bulk density (by layer) were extracted from the SSURGO database projected to the model domain. The meteorological forcing (precipitation, air temperature, humidity, wind speed, downward solar radiation, downward longwave radiation, and air pressure) were obtained from the North American Land Data Assimilation System Phase 2 forcing data. Model input for the WE-38 watershed is managed at https://github.com/PSUmodeling/Cycles-L-WE38-simulations.

The simulation period was 16 years from 0000 UTC 1 January 2000 to 0000 UTC 1 January 2016. The model was spun-up to reach steady states for soil organic carbon and groundwater storage. The model was manually calibrated using observed outlet discharge and the USDA-NASS survey corn yield.

Seven scenarios were simulated, as described in the following table:

Scenarios
Fertilization multiplier
Manure fertilizer
Synthetic fertilizer
Switchgrass

WE38
1.0
X
X

WE38_1dot25xN
1.25
X
X

WE38_1dot5xN
1.5
X
X

WE38_lowland
1.25
X
X
H

WE38_lowland_manure
1.25
X

H

WE38_upland
1.25
X
X
L

WE38_upland_manure
1.25
X

L

L and H represent low denitrification and high denitrification, respectively, which are defined as the grids that have low and high denitrification rates within the corn (2 years)-soybean-corn-hay (4 years) rotation or the corn (4 years)-hay (4 years) rotation locations.