SWAT's Up!

SWAT's Up is a list of recent projects and activities happening in the SWAT community. If you have items to contribute to this section, please email Allan Jones at cajones@tamu.edu.

New Landscape Contaminant Modeling System
December 7, 2015

The US Army Corps of Engineers is developing a new landscape-scale contaminant modeling system to identify and simulate the fate of sediment, nutrients, and chemical contaminants over large spatial and temporal scales. The system uses:

  • SWAT to simulate overland and small stream flows of water, sediment, nutrients and agricultural pesticides
  • ATTIC (Advanced Tool for Tracking Industrial Chemicals) to identify commercial sources of specific chemicals of interest
  • CSM (Contaminant Simulation Module) to simulate the transformation of contaminants in large streams
  • NSM (Nutrient Simulation Module) to simulate algae, C, O, N, and P dynamics in large streams
  • HEC-RAS (River Analysis System) to simulate flows and sediment transport in large streams.

The system is being tested in the Calleguas Creek Watershed in California. For more information contact Dr. Billy Johnson (Billy.E.Johnson@erdc.dren.mil).

Massive EPIC Analysis for the UK
November 30, 2015

Robin Taylor is working with researchers at the University of Durham (UK) to use EPIC to conduct a massive factorial simulation experiment to determine if crop rotations can be used to reduce runoff, erosion, and nutrient losses from farm fields in the UK. The study involves 18 crops in 941 crop rotations grown on two sites, four slopes, eight soils, and 169 fertilizer combinations.  The USDA-ARS computer cluster is being used, allowing 150 simultaneous runs to be executed simultaneously. To date, approximately 14 million runs have been completed, and about 8 million runs remain. For more information, contact Dr. Taylor (rtaylor@brc.tamus.edu).

Rice Paddies
November 23, 2015

A group of SWAT developers, including Drs. Balaji Narasimhan (nbalaji.iitm@gmail.com), Phil Gassman (pwgassma@iastate.edu), Jaehak Jeong (jjeong@brc.tamus.edu), Tasuku Kato (taskkato@cc.tuat.ac.jp), recently met in Tokyo to discuss and plan improvements in simulation of rice paddy irrigation, hydrology, and water quality by SWAT and APEX. For more information contact these scientists.

Short-Term Weather Forecasts
November 16, 2015

Hydrologic and agricultural management models can use short-term (1-8 days) weather forecasts in SWAT format to help farmers and water authorities manage their resources.  Zach Easton (zeaston@vt.edu), Andrew Sommerlot (andrewrs@vt.edu) and Daniel Fuka are developing a tool based on the NCDC/NOAA Global Forecast System to allow SWAT to project hydrology up to eight days in the future. For more information contact Dr. Easton or Dr. Fuka.

Weather Data to Simulate Climate Change Scenarios
November 9, 2015

Zach Easton (zeaston@vt.edu) and Daniel Fuka (drfuka@vt.edu), are developing a tool that allows users to generate daily IPCC CMIP-5 climate change data interpolated to the precise locations of historical meteorological stations. For more information contact Dr. Easton.

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