Current and Future Plans R. Srinivasan
Contents 1 The ArcSWAT Interface 2 VizSWAT: Output Visualization 3 User online support 4 MapWindows SWAT interface 5 ArcGIS SWAT/APEX interfaces 6 Radar Rainfall preprocessor 7 Rain Guage interpolation tool 8 CUP Calibration and uncertainty programs 2 9 World data for SWAT modeling
The ArcSWAT Interface ArcSWAT is an ArcGIS extension that contains a sophisticated watershed delineation module, a land use and soils analysis module, and SWAT model input file generator and editor. ArcSWAT was developed by Texas A&M University and Stone Environmental and is available for free download. Current version is available for ArcGIS 9.1; Working towards releasing ArcGIS 9.2 version of ArcSWAT in the fall 07 3
4 ArcSWAT: Watershed Delineation DEMs at any resolution, XY or Z units Analysis masking Optional stream-burning DEM-based or predefined watersheds User-defined subbasin size Manual editing of subbasin locations Calculation of watershed and stream physical parameters
ArcSWAT: Landscape Analysis Purpose: To understand the distribution and co-occurrence of land use, soils, and slope at the subbasin level. Land use: Allows raster or vector datasets. Built in NLCD and USGS LULC lookup tables. Soils: Allows raster or vector datasets. Integrated with nationwide US STATSGO. Slope: Slope calculated directly from DEM. Allows user-defined slope classes. 5
ArcSWAT: HRU Definition Purpose: To extract the dominant and critical landscape units for each subbasin. Land use, soil, and slope thresholds: Define minimum area for inclusion. Land use splitting: Allows users to represent GIS classification (e.g., Row Crop ) as a combination of multiple classes (e.g., corn and soybean ). Land use threshold exemptions: Keeps critical land classes regardless of thresholds. 6
VIZSWAT: Visualization and Analysis of SWAT Model Results http://vizswat.tamu.edu
Custom Capabilities View results by subbasin, reach or HRU View input and observed timeseries Analysis tools: Timeseries aggregation, statistics, baseflow separation and more View multiple model domains and/or scenarios simultaneously 8
View results by subbasin, reach and HRU 9
View inputs and outputs Reservoirs Precipitation stations 10
11 140 120 100 80 60 40 20 0 0 20 Correlation Analysis 40 60 80 Observed Flow 100 120 Samples Fit Line Frequency Distribution Values FLOW_OUT Frequency (%) Below 0 0-2 2-4 4-6 6-8 8-10 10-12 12-14 14-16 16-18 18-20 Above 20 0.2 0.15 0.1 0.05 0
120 100 Baseflow Analysis Streamflow Baseflow (1 filter) Flow (cms) 80 60 40 20 0 12/08/1991 12/07/1995 Date/Time 12/06/1999 Statistic Parameters Values Average 8.02054591277716 Minimum 0 Maximum 127.099998474121 Date/Time at Minimum 1/2/1988 Date/Time at Maximum 3/12/1990 12
VizSWAT Visualization Tool for SWAT Multiple scenarios 13
User Online Support Established 3 user groups SWAT User 218 users with 448 discussion messages ArcSWAT 94 users with 178 messages VizSWAT 10 users with 6 messages http://groups.google.com/group/swatuser http://groups.google.com/group/arcswat http://groups.google.com/group/vizswat 14
MwSWAT Help developing countries improve their capacity in IWRM Free, open source tools and other resources Network of users and resource developers Project of the United Nations University First tool MWSWAT (MapWindow + SWAT) http://www.waterbase.org waterbase.contact@waterbase.org 15
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ArcGIS SWAT/APEX interface Users will be able to run either the SWAT model APEX model (small watershed scale version with lot detailed BMPs option) Combination of SWAT and APEX All through one interface 17
Radar Rainfall preprocessor The Radar_SWAT is a GIS tool for processing NexRadar data for SWAT application. The major function of this tool is to calculate the spatial average mean rainfall values observed by NexRadar for each subbasin that will be used as rainfall inputs for SWAT. Radar_SWAT Daily Hourly Rain gauge Rainfall files NexRadar files Subbasin map Gzip & XMRG Position of rain gauges in point shape file Containing time series of rainfall values for each rain gauge Compressed NexRadar binary files from NWS Delinated subbasin map by SWAT Uncompress NexRadar files, and convert them Into ascii format 18
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Structure of the Rain Guage interpolation tool General framework of GIS based interpolation program 20 Raingauge point shape file Average rainfall for each Hydrologic Unit Each rain gauge s rainfall records in text format Input every time step s rainfall to the corresponding rain gauge point Do interpolation for every time step using user selected methods Calculate output variable for basin and hydrologic unit Areal mean rainfall Hydrologic unit polygon CV MAE DEM Input Main Procedure Output
21 GIS Interface
22 Output precipitation of each zonal unit
23 Output spatial distribution of rainfall in grid format
CUP Calibration and Uncertainty Programs for SWAT Dr. Karim Abbaspour is developing several Calibration and Uncertainty tools like PEST, Parasol and Sufi The tool will be available Spring 08 24
World GIS data for SWAT modeling Working with EAWAG, Dr. Karim Abbaspour to make the landuse and soils along with its attributes available for the entire world to model with SWAT 1KM DEM and 90m DEM for the world 25
26 Global data sets (1)
Global data sets (2) 27
Acknowledgements ArcSWAT was developed with cooperation with Stone Envirnonmental Inc. VizSWAT was developed with cooperation of W.F. Baird & Associates MwSWAT is being developed with cooperation of UN University, Macau and Idaho State University CUP and World datasets EAWAG, Switzerland Weather related tools Blackland Research Center, SSL, TAES 28