Argonne National Laboratory

Upcoming Events

2 Parameter Surface Flow Diffusion Hydrograph Model and Microclimate Simulation

Yang Yang, Ph.D. Candidate, SUNY-ESF
January 31, 2013 1:00PM to 2:00PM
Building 240, Room 1404
In this presentation, I will introduce two of my research topics: hydrograph simulation and microclimate simulation.

Hydrograph, the time series of stream water level, carries the geological and topographic information of a watershed. Parsimonious models provide an appealing approach to improving hydrograph prediction if they can integrate basin infrastructure and geomorphic complexity into a few representative parameters and handle short forecast lead times. We developed a 2-parameter surface flow diffusion hydrograph model based on the analytical solution for the advection-diffusion equation describing the surface flow.

This model utilizes only two parameters to simulate the shape of the hydrograph, rising and falling limbs and the timing of the peak. The two parameters carry the information of the watershed scale, surface flow diffusivity and flow celerity. In this presentation, I will introduce the development and applications of the 2-parameter analytical surface flow diffusion hydrograph model.

Microclimate, especially air temperature and humidity, significantly affects human thermal comfort, ecosystem services, and building energy use. Air temperature and humidity measurements are generally recorded at fixed-location meteorology stations, which do not represent the spatial variations encountered in these parameters across the landscape. Based on the heat flux network over the land surface, we developed a spatial air temperature and humidity model to simulate local air temperature and humidity over a region where the mesoscale climate is presumed homogeneous. In this presentation, I will introduce the physics of the model and its application.