environmental hydrology visualization

Environmental Hydrology Visualization

Need:• Access to Distributed

Large datasets• Cross platform• Cluster algorithms• Lightweight component• Auto-data translators• Metadata support• Heterogeneous format

support• Component Libraries• Real-time GIS/Model • Distance collaboration• Vector/raster• Nested grid

Have:•Vis5D•SGI Explorer•Fluid Tracers•VisAD•Cave5D•nViz•GeoVis…

Flow Modeling in Large Scale Systems

• Mississippi RiverWeb Consortium: Computational science in informal education– GIS: Terrain, Bathymetry,

Land Use– Linked data (fisheries,

flow, etc)– 2D flow models– Visualization

Digital River Basin: Multi-user simulation, high-resolution visualization, multi-modal interaction (location detection, touch interface…)

Digital River Basin

•Model driven query•User driven query•Composite data•Metadata X 20

Status Report

a) infrastructure/code development completed since October 1

• Prototype coupled model/visualization application for museum project:• High resolution plasma display• Inter-processor communication• “Single user” highly interactive• VTK/Performer

http://www.ncsa.uiuc.edu/Cyberia/RiverWeb/Projects/RWMuseum/products.html

http://brighton.ncsa.uiuc.edu/~prajlich/rw/

Status Report: Efforts Underway

• Next phase coupled model/visualization (alpha - 12/00)• Multiple high resolution displays• Multiple users• Multi-processor • Full database interaction (postgres)• Coupled model (runoff/channel)• Web portal interface (9/01)

Status Report: Efforts Underway

• Re-examination of high-resolution parallel overland flow model (funded outside of PACI EHAT)

• kinematic wave equation- time-dependent two dimensional nonlinear problem on a large domain

• additive schwartz method to solve the large domain finite difference method to discretize.

• Implicit scheme in time direction to solve instability. • First-order Taylor series expansion to linearize the nonlinear

algebraic system at each time step.• Scalable parallel preconditioners and Krylov subspace methods

including ICC, ILU, block Jacobi and so on to solve the linearized algebraic system.

Projected Impact

a) What is the current usage of the infrastructure/code? Or what is the projected usage during the next 6 months?

• Museum: 100,000 in first 2-3 months

b) What is the current community interest in such infrastructure?

• USEPA Fox River Management

• NSF Illinois River …

c) How broad might the community impact be?• Necessary interest in multiple communities

Interconnections:

a) What infrastructure that you are developing is dependent on other Alliance or EH infrastructure?

• PETSc, HDF, VisBench, Globus (poss.)

b) What Alliance people outside EH do you interact with?

• Data Mining and Visualization (Baker, Welge, Folk, Rajlich, Khakshour, etc.)

• EOT (Curtis, Sonin)• Government (Prudhomme, et al.)