driNET: Drought Reserach Initiative Network

20 Jun 2011 | Online Presentations | Contributor(s): Lan Zhao, Carol Song

Modeling the Appearance and Behavior of Urban Spaces

16 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

Urban spaces consist of a complex collection of buildings, parcels, blocks and neighborhoods interconnectedby streets. Accurately modeling both the appearance and the behavior of dense urban spaces is a significantchallenge. The recent surge in urban data and its availability via the Internet has...

Quantifying the Spatial Variability of Surface Fluxes Using Data from the 2002 International H2O Project

15 Jun 2011 | Publications | Contributor(s): Dev Niyogi

Spatial variability in the exchange of energy and moisture is a key control onnumerous atmospheric, hydrologic, and environmental processes. Using observations madeon fair weather days during the 2002 International H2O Project, four methods for quanti-fying the spatial variability of surface...

Building Reconstruction using Manhattan-World Grammars

14 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

We present a passive computer vision method thatexploits existing mapping and navigation databases inorder to automatically create 3D building models. Ourmethod defines a grammar for representing changes inbuilding geometry that approximately follow theManhattan-world assumption which states...

Interactive Design of Urban Spaces using Geometrical and Behavioral Modeling

14 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

The main contribution of our work is in closing the loop betweenbehavioral and geometrical modeling of cities. Editing of urbandesign variables is performed intuitively and visually using agraphical user interface. Any design variable can be constrained orchanged. The design process uses an...

A seasonal-scale climatological analysis correlating spring tornadic activity with antecedent fall–winter drought in the southeastern United States

14 Jun 2011 | Publications | Contributor(s): Dev Niyogi

Using rain gauge and satellite-based rainfall climatologies and the NOAA Storm PredictionCenter tornado database (1952–2007), this study found a statistically significant tendency forfall–winter drought conditions to be correlated with below-normal tornado days the followingspring in north...

Visualization of Simulated Urban Spaces: Inferring Parameterized Generation of Streets, Parcels, and Aerial Imagery

14 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

Urban simulation models and their visualization are used to help regional planning agencies evaluate alternativetransportation investments, land use regulations, and environmental protection policies. Typical urban simulations providespatially distributed data about number of inhabitants, land...

Interactive Example-Based Urban Layout Synthesis

13 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

We present an interactive system for synthesizing urban layouts byexample. Our method simultaneously performs both a structure-based synthesis and an image-based synthesis to generate acomplete urban layout with a plausible street network and withaerial-view imagery. Our approach uses the...

Possible relation between land surface feedback and the post-landfall structure of monsoon depressions

13 Jun 2011 | Publications | Contributor(s): Dev Niyogi

The effect of pre-storm land surface on the monsoondepressions (MDs) is studied. The Weather ResearchForecast (WRF) model was configured with two nesteddomains to explore the sensitivity of MDs to antecedentsoil moisture and land surface representation for selectedthree landfalling MDs during...

A Hydroclimatological assessment of the regional drought vulnerability: A Case Study for Indiana drought

13 Jun 2011 | Publications | Contributor(s): Dev Niyogi

Characterizing and developing drought climatology continues to be achallenging problem. Also as decision makers seek guidance on water managementstrategies, there is a need for assessing the performance of drought indices. This requires theadaptation of regionally appropriate, drought indices for...

Evaluating a New Deposition Velocity Module in the Noah Land-Surface Model

13 Jun 2011 | Publications | Contributor(s): Dev Niyogi

The community Noah land-surface model (Noah LSM) has been modified tocouple with a photosynthesis-transpiration scheme (GEM) to estimate the deposition veloc-ity (Vd ) for air quality studies. This new capability of the Noah-GEM model was testedin a point version of the National Center for...

Urban Ecosystem Design

07 Jun 2011 | Publications | Contributor(s): Daniel Gerardo Aliaga

We address the open problem of spatial distribution of vegetation in urban environments by introducing a user-guided simulation and procedural system for integrating plants into the interactive design process of 3D urban models. Our approach uses as input 3D geometry of an urban layout from which...

A TeraGrid Science Gateway for Studying Hydrological Extremes using a Land Data Assimilation System

06 Jun 2011 | Publications | Contributor(s): Dev Niyogi, Lan Zhao, Carol Song, Rao S Govindaraju

A TeraGrid enabled science gateway to study surface hydrology is under development at Purdue University. Such a gateway is needed for class room and graduate research as well as for developing a multidisciplinary framework that integrates environmental observatories and tools for drought/flood...

Delivering Real-time Satellite Data to a Broader Audience

06 Jun 2011 | Publications | Contributor(s): Lan Zhao, Carol Song, Larry Biehl

This paper presents our work of enhancing the existing cyberinfrastructure using Web 2.0 technologies for delivering real time satellite data to a broader audience. As a resource provider on the TeraGrid, Purdue University hosts several data collections for earth and environmental research,...

A Web-Based Interface for SWAT Modeling on the TeraGrid

06 Jun 2011 | Publications | Contributor(s): Lan Zhao, Carol Song, Indrajeet Chaubey, Rao S Govindaraju

The Soil and Water Assessment Tool (SWAT) is a river basin scale model developed by the USDA Agricultural Research Service (ARS). It is widely used by researchers in various scientific domains to study the impact of land management practices on water quantity, sediment, and water quality in large...

DDAD2011 Symposium Program

03 Jun 2011 | Workshops | Contributor(s): Carol Song

This is the preliminary program for the 2011 Symposium on Data-Driven Approaches to Droughts

DDAD2011 flyer

20 May 2011 | Downloads | Contributor(s): Carol Song