报告地点：腾讯会议(会议ID：411 4788 6096）

报告时间：2020-12-18 从 15:00 到 16:30

报告人：张弛

报告人简介：

Chi Zhang is an Assistant Professor in the Department of Geology at The University of Kansas. Chi received her Ph.D. in Environmental Geophysics from Rutgers University in 2012. Chi’s research focuses on studying the complex fluid-rock interactions using geoelectrics, nuclear magnetic resonance, and modeling tools. Chi is interested in understanding the tightly coupled physical, chemical, and biological processes that govern the behavior of geologic media and their constituent fluids (water, brine, CO2, and hydrocarbons) from the micro- to macro- scale. Currently, Chi works on understanding water distribution, weathering, and geochemical fluxes in carbonate rocks.

报告题目：Probing Water Distribution in Carbonate Rocks – A Critical Zone Geophysical Perspective

报告内容简介

The carbonate critical zone studies use transdisciplinary approaches to solve some of the most pressing challenges society faces (e.g., security, scarcity, and uncertainty of water, and carbon sequestration). My research uses geophysical tools, coupling with hydrogeological and biogeochemical information, via observations and modeling, to understand how the fluid-rock interactions are influenced by abiotic and biotic, natural and anthropogenic processes. The findings of my work help understand and predict fundamental carbonate critical zone processes such as water flux and storage, interactions between groundwater and surface water, the weathering rate and pattern of the bedrock.

In this talk, I will describe how I use geophysical tools, mainly nuclear magnetic resonance (NMR) to quantify and predict water storage and fluxes, biogeochemical fluxes, and weathering dynamics in carbonate critical zones. Using a recent study as an example, I will demonstrate how to link laboratory NMR findings with field NMR observations to quantify the key hydrogeological parameters, to update the conceptual model of groundwater flow paths, and to delineate water distribution in unsaturated weathered bedrock in a merokarst system. In addition, this talk will discuss the potential for hydrogeophysics to transform our understanding and modeling of carbonate critical zone processes.

报告视频