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谷水论坛第十五期:水文地球物理方法在农业领域的应用系列报告(一)

发布日期:2021-11-30访问次数:字号:[ ]

报告题目:

Advances in monitoring flow and transport using electrical hydrogeophysics: some agricultural applications

 

时间与Microsoft Teams线上会议室:

北京时间:十二月8日 10:00

纽约时间:十二月7日 21:00

https://teams.microsoft.com/l/meetup-join/19%3ameeting_MTEwMjE4NDctNzBjYy00YzZhLWI1ZjYtYjk4MGFmNjAxN2Zj%40thread.v2/0?context=%7b%22Tid%22%3a%22529d91ae-fe32-4f7b-b76a-3c467c937f60%22%2c%22Oid%22%3a%22e7898b93-cbe6-4f46-ad58-f9abe22dd53a%22%7d

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报告专家:

Lee Slater, Henry Rutgers Professor of Geophysics

Rutgers, the State University of New Jersey

 

联系人:

陈曦 (chenxioffice@cau.edu.cn, 13718664107

 

内容简介:

Hydrogeophysical techniques are increasingly used to non-invasively monitor flow and transport processes occurring in the subsurface of the Earth. Electrical-hydrogeophysical techniques are often perhaps the most promising as the electrical resistivity of a porous medium is strongly controlled by the salinity of the pore-filling fluids, along with the water content in the unsaturated zone. Advances in data acquisition hardware and data processing algorithms are encouraging 4D (space plus time) monitoring of transport processes over a wide range of spatial scales. I will describe the basic theory underling the application of electrical geophysics for hydrogeophysical monitoring, and summarize recent developments in data acquisition and processing (including highlighting the availability of open-source software). I will illustrate the opportunity to non-invasively monitor subsurface flow and transport phenomena through selected agriculture-relevant applications. The first case study considers the use of 4D electrical resistivity imaging to improve understanding of the effects of preferential flow on nitrate transport in unsaturated soils. The second case study considers the use of electrical imaging, combined with electromagnetics, to quantify subsurface transport of phosphorous from flat agricultural fields into drainage ditches. I will also briefly touch on new strategies to improve the information content of electrical imaging through measurements of interfacial (double layer) polarization. This approach has the potential to permit rapid non-invasive assessment of the cation exchange capacity of agricultural soils.

 

报告人简介:

Lee Slater is an internationally recognized expert in near surface geophysics and hydrogeophysics. He has published extensively, including 150 papers in peer reviewed international journals of hydrogeology and geophysics. Lee has served as principal investigator on multiple research and technology demonstration projects funded by the US Department of Defense, US Department of Energy, US Department of Agriculture, US National Parks Service and National Science Foundation. He has also served in prominent leadership roles in the academic geophysical community, including Chair of the Near Surface Geophysics Focus Group of the American Geophysical Union (AGU), Chair of the AGU Hydrogeophysics Technical Committee and President of the Environmental and Engineering Geophysical Society (EEGS). Lee currently serves as Associate Editor of Water Resources Research (WRR) and he recently edited a new volume on Near Surface Geophysics published in the 2nd Edition of the Treatise on Geophysics, part of the Elsevier Major International Reference series. Lee has served on multiple advisory boards for large interdisciplinary hydrogeological research projects in Europe. He was the recipient of the 2013 Harold B. Mooney award of the Society of Exploration Geophysicists (SEG). His numerous PhD graduates have mostly gone onto academic positions and are now making their own contributions to advancing research in hydrogeophysics. In 2018 Lee was elected Fellow of the American Geophysical Union (AGU), with the citation: "for visionary experimentation in near surface geophysics that has advanced understanding of subsurface hydrogeological and biogeochemical processes".






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