Soil Moisture Data Assimilation The objective of this project is assimilate field scale and remotely sensed soil moisture data to improve the predictive ability of hydrologic models. >>More Details
Funding Agency: Purdue Research Foundation and USDA-ARS
Duration: 2007-2011
Status: Current
Investigator(s): V. Merwade and G. Heathman
Graduate Research Assistant(s): Eunjin Han
Funding Agency: None
Duration: 2008 - present
Status: Current
Investigator(s): V. Merwade
Graduate Research Assistant(s): Younghun Jung
Publications/Reports/Theses
Merwade V. M., Olivera F., Arabi M., and Edleman S., Uncertainty in Flood Inundation Mapping - Current Issues and Future Directions. ASCE Journal of Hydrologic Engineering, Vol. 13(7), pp. 608-620 (2008).
Olivera F., and V. Merwade, Uncertainty in Flood Inundation Mapping, Severe Storm Prediction and Global Climate Impact on the Gulf Coast Conference, Rice University, Houston, TX, October 2008.
Merwade V., Olivera F., and Edleman S., Uncertainty in Flood Inundation Mapping Process. Proceedings of the American Water Resources Association 2008 Spring Specialty Conference GIS and Water Resources V, San Mateo, CA, March 2008.
Funding Agency: Purdue Research Foundation
Duration: 2007 - 2010
Status: Current
Investigator(s): V. Merwade
Graduate Research Assistant(s): Kwangkin Kang
Funding Agency: National Science Foundation
Duration: 2006 - 2010
Status: Current
Investigator(s): B. Engel (PI), R. Govindaraju and others
Graduate Research Assistant(s): Sanjiv Kumar
Publications/Reports/Theses
Kumar, Sanjiv and V. Merwade, Impact of watershed subdivision and soil data resolution on model calibration and parameter uncertainty using SWAT. Journal of American Water Resources Association, 45(5):1179-1196. (2009)
Govindaraju, R.S., B. Engel, D. Ebert, B. Fossum, M. Huber, C. Jafvert, S. Kumar, V. Merwade, D. Niyogi,, L. Oliver, S. Prabhakar, G. Rochon, C. Song, L. Zhao. A vision of cyberinfrastructure for end-to-end environmental explorations (C4E4). ASCE Journal of Hydrologic Engineering, Vol. 14(1), pp. 53-64 (2009).
Studying the effects of spatial scaling on hydrologic model calibration using Soil and Water Assessment Tool (SWAT). MS Thesis, Graduate School, Purdue University, 124 pages. (2009)
Zhao, Lan, C. Song, I. Chaubey, S. Kumar, V. Merwade and R. S. Govindaraju, A web-based interface for SWAT modeling on the TeraGrid. Proceedings of the 2009 5th International SWAT Conference, Boulder, CO, 2009.
Kumar, S., W. Lee, V. Merwade, L. Zhao, and C. Song. Using TeraGrid to explore Historical Hydro-Climatic changes in U.S. Midwest Region. Proceedings of the TeraGrid 2009 Conference, Arlington, VA, June 2009.
Kumar, S., and V. Merwade, CCSM Modeling for studying the impact of drainage on hydro-climatology of the U.S. Midwest. Eos Transactions, American Geophysical Union, 90(22), Joint Assembly Supplement, Abstract H12B-07, AGU Spring Assembly, Toronto, Canada, May 2009.
Kumar S., Merwade V., Bain, D. J., Hydro-climatological Impact of Century Long Drainage in Midwestern United States. Eos Transactions, American Geophysical Union, 89(53), Fall Meeting Supplement, Abstract H11F-0828, AGU Fall Meeting, San Francisco, CA, December 2008.
H. Chang, D. Niyogi, F. Chen, A. Kumar, C. Song, L. Zhao, R. Govindaraju, V. Merwade, M. Lei, and K. Scheeringa, Developing a TeraGrid Based Land Surface Hydrology and Weather Modeling Interface, Proceedings of the TeraGrid 2008 Conference, Las Vegas NV, June 2008.
S. Kumar, V. Merwade, L. Zhao and C. Song, Cyberinfrastructure for Environmental Data and Modeling (Student poster competition winner), Proceedings of the TeraGrid 2008 Conference, Las Vegas NV, June 2008.
Kumar S. and Merwade V., Studying the effects of spatial scale on hydrologic model calibration using Soil Water Assessment Tool (SWAT), Proceedings of the ASCE World and Environmental Resources Congress, Honolulu, HI, May 2008.
Merwade V., Kumar S., Song C., Zhao L., Govindaraju R., and Niyogi D., Cyberinfrastructure for End-to-End Environmental Explorations. Eos Transactions, American Geophysical Union, 88(52), Fall Meeting Supplement, Abstract H13A-0985, AGU Fall Meeting, San Francisco, CA, December 2007.
L. Zhao, C. X. Song, V. Merwade, Y. M. Kim, R. Kalyanam, D. Ebert, B. Engel, R. Govindaraju, M. Huber, C. Jafvert, D. Niyogi and S. Prabhakar., “Interweaving Data and Computation for End-to-End Environmental Exploration on the TeraGrid”, Proceedings of the TeraGrid 2007 Conference, Madison, Wisconsin, June 2007.
Govindaraju, R., B. Engel, D. Ebert, B. Fossum, M. Huber, C. Jafvert, V. Merwade, D. Niyogi, L. Oliver, S. Prabhakar, G. Rochon, C. Song, L. Zhao, "Cyberinfrastructure for End-to-End Environmental Explorations (C4E4)", poster presented at the Joint Workshop for WATERS Network Test Beds and CUAHSI Hydrologic Information Systems, Austin, TX, November 14-17, 2006.
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Unit Hydrographs For Indiana The objective of this project is estimate unit hydrograph paratemeters for Indiana watersheds, and relate these parameters to watershed characteristics such as area and slope. >>More Details
Funding Agency: Environmental Engineers of the Future Program
Duration: 2007 - 2010
Status: Current
Investigator(s): V. Merwade and R. S. Govindaraju
Graduate Research Assistant(s): Jared Wilkerson
Publications/Reports/Theses
Wilkerson, J., Regional regression equations to estimate synthetic unit hydrograph parameters for Indiana. MS Thesis, Graduate School, Purdue University, 112 pages. (2009)
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Comparison of 2D Hydrodynamic Modeling with 1D Modeling in Flood Inundation Mapping The objective of this project is to evaluate the effect of topography and geometric definition on hydraulic models, and compare 1D and 2D models in flood inundation mapping. >>More Details
Funding Agency: Environmental Engineers of the Future Program
Duration: 2006 - 2008
Status: Complete
Investigator(s): V. Merwade
Graduate Research Assistant(s): Aaron Cook
Publications/Reports/Theses
Cook, Aaron and V. Merwade, Effect of topographic data, geometric configuration and modeling approach on flood inundation mapping. Journal of Hydrology, Vol. 377, pp. 131-142. (2009)
Merwade V., Cook A., and Coonrod J., GIS techniques for creating river terrain models for hydrodynamic modeling and flood inundation mapping. Environmental Modelling & Software, Vol. 23/10-11, pp. 1300-1311. (2008)
Cook, A. and Merwade V., Comparison of one-dimensional HEC-RAS with two-dimensional FESWMS in flood inundation mapping. Proceedings of the American Water Resources Association 2008 Spring Specialty Conference GIS and Water Resources V, San Mateo, CA.(2008)
Cook, A., Comparison of one-dimensional HEC-RAS with two-dimensional FESWMS model in flood inundation mapping. MS Thesis, Graduate School, Purdue University, 99 pages. (2008)
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I am interested in exploring the three-dimensional structure of river channels and developing GIS tools for river analysis.
As a part of my PhD, I developed a GIS model called River Channel Morphology Model (RCMM) which uses channel planform and
flow attributes to describe the channel cross-sections using statistical models.
By using the blue streamlines from hydrographic maps and flow data, RCMM creates cross-sections as a
combination of beta probability distribution functions. RCMM is applicable to a wide variety of applications in water resources engineering. The table below provides a list of GIS tools
that I have developed as a part of my research activities. I'm working on making all these tools available with associated tutorials very soon. If you need them now, send an email to vmerwade_at_purdue_dot_edu.
Name
Description
Download
Bathymetry Interpolation
This tool interpolates channel cross-sections to create a bathymetry mesh for the main channel.
River Channel Morphlogy Model (RCMM) can create a 3D channel from a blue line. The channel description from RCMM can be used to run HEC-RAS. The tool is developed for ArcGIS 9.0 and higher
The bank delineation tool takes an aerial photograph and the channel centerline as input, and automatically creates a boundary polygon for the channel.
Delineation.zip
Cross-section and Thalweg
In traditional cross-section surveys, a cut-line across a river is defined, and the elevations are measured along this line. Such a technique provides a series of pairs of (m,z) values, where m is the distance along the cut-line measured from the left bank (looking downstream), and z is the elevation. This tool creates 3D cross-sections and thalweg using cutlines and associated (m,z) values.
3D CrossSections.zip
Channel Toolbar
This toolbar has functions for (1) creating a thalweg using a set of bathymetric (x,y,z) points, and (2) assign (s,n) coordinates to (x,y,z) points. In the (s,n) coordinate system, the channel is represented with respect to the flow direction, where s is the distance along the channel and n is the distance across the channel.
Toolbar.zip
Fish Habitat Tool
The fish habitat modeling tool combines the results of the hydraulic model (flow velocity and depth for a given flow) and the biological sampling statistics (habitat conditions described in terms of flow velocity and depth) to determine the spatial extent of available hydraulic mesohabitat and the available hydraulic habitat for individual fish species at a given flow-rate.
