Abstract:

In this submission, a collection of data is presented, consisting of maps and temporal graphs showcasing both the spatial and temporal variations in the outputs of the Sediment and Water Assessment Tool (SWAT) model. These outputs include: 1) Total precipitation in millimeters, representing the amount of rainfall on the subbasin. 2) Actual evapotranspiration in millimeters, indicating the water loss from the subbasin due to evaporation and transpiration. 3) Surface runoff contribution in millimeters, representing the portion of water flowing over the surface and eventually contributing to streamflow during the month and year. 4) Water yield in millimeters, signifying the net water leaving the subbasin and contributing to streamflow in the reach for the given month and year. 5) Sediment yield in metric tons per hectare, representing the amount of sediment transported from the subbasin to the reach during the month and year. 6) Sediment transport in metric tons per hectare, indicating the sediment moved from the subbasin into the reach during the month and year. 7) NO3 in surface runoff in kilograms of nitrogen per hectare, representing the amount of nitrate transported by surface runoff into the reach during the month and year. Organic nitrogen in surface runoff in kilograms of nitrogen per hectare, representing the amount of nitrate transported by surface runoff into the reach during the month and year. Organic phosphorus in surface runoff in kilograms of nitrogen per hectare, representing the amount of nitrate transported by surface runoff into the reach during the month and year. All parameters in the spatial variations are presented as an average annual value over each sub-basin. All the parameters in the temporal variations are presented as an average monthly value over each sub-basin. Additionally, the submission encompasses a shapefile that conveniently compiles the annual average values of the watershed’s outputs throughout the entire modeling period, 2001 to 2020. Model input and model output for the watershed subbasins are available in related datasets HI.x847.000:0016 (https://doi.org/10.7266/zzfm44t2, inputs) and HI.x847.000:0017 (https://doi.org/10.7266/fmz6065v, watershed sub-basin outputs).

Suggested Citation:

Ahmed, Mohamed. 2024. Spatial and temporal outputs of the Sediment and Water Assessment Tool (SWAT) model over the Baffin Bay watershed, Texas. Distributed by: GRIIDC, Harte Research Institute, Texas A&M University–Corpus Christi. doi:10.7266/vwry1w58

Purpose:

The objective of this study is to develop a Soil Water and Assessment Tool (SWAT) model for the Baffin Bay watershed in Texas. This model was then used to quantify surface runoff, evapotranspiration, nutrient content, and sediment yield loadings to Baffin Bay during the period from 2001 to 2020.

Data Parameters and Units:

SUB = Subbasin number. AREA = Area of the subbasin (km2) PRECIP = Total amount of precipitation falling on the subbasin during time step (mm H2O). ET = Actual evapotranspiration from the subbasin during the time step (mm). SURQ = Surface runoff contribution to streamflow during time step (mm H2O). WYLD = Water yield (mm H2O). The net amount of water that leaves the subbasin and contributes to streamflow in the reach during the time step. (WYLD = SURQ + LATQ + GWQ – TLOSS – pond abstractions) SYLD = Sediment yield (metric tons/ha). Sediment from the subbasin that is transported into the reach during the time step. NSURQ = NO3 in surface runoff (kg N/ha). Nitrate transported by the surface runoff into the reach during the time step. ORGN = Organic nitrogen in surface runoff (kg N/ha). ORGP = Organic phosphorus in surface runoff (kg P/ha).

Methods:

Simulated SWAT model output data during the period from 2001 to 2020.

Individual Files: