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.

December 21, 2015

Kate Behrman and Mari-Vaughn Johnson are working with Jimmy Williams to develop an improved wetland component for APEX. It is based on the denitrification subroutine developed by Cesar Izaurralde. Contact Dr. Behrman (kate.behrman@ars.usda.gov) for more information.

December 14, 2015

Kyung Hwa Cho is interested in fecal bacteria dynamics in surface waters. Since existing watershed models have limitation in simulating seasonal variability of fecal bacteria, he has developed new bacteria subroutines for SWAT to improve its prediction accuracy. He is testing the new modules with observations from different sites. For more information contact Dr. Cho (khcho@unist.ac.kr).

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.

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