Day 1 :
Researchers in Geology, LLC, USA
Time : 10:35-11:05
Dmitry Kukushkin is the Cofounder of Researchers in Geology, LLC (FL, USA). He was was born in 1947 in Moscow, USSR (now Russia). He studied in Moscow Geological Prospecting Institute from 1965 to 1970. In 1971 he began working in the field of geological research and prospecting, mostly in Siberia and Africa. Dr. Kukushkin was awarded his Ph. D. in geology in 1986. He has extensive experience in mapping and prospecting for oil, gas, metals (including gold), including the use of aerial and satellite images. Dr. Kukushkin developed a new method for analyzing aerial and satellite images that allows locating sites with a high potential for the presence of oil, gas, and/or metals. His method also helps to reduce expenses for drilling and accelerate the development of sites.
Rectilinear details of landscape – lineaments – are the most numerous elements detectable on aerial and space photos of Earth's surface. Linea¬ments form a complex web on delineation maps of aerial and space photos. Photogeologists consider lineaments to be the traces of interaction of fractures or faults of Earth’s crust with the surface, having direct and indirect relationships with geological structures. Lineament field is the surface manifestation of fields of tension, stress and deformation of rocks. General lineament field is the result of superimposition of multiple lineament fields of various scales, such as planetary, regional, and local. The causes of planetary fields of tensions, brittle disloca¬tions and lineament fields are rotational and tide tensions in the Earth's crust. Within regional geological structures regional fields of stress and tensions dominate, creating regional field of brittle dislocations and regional lineament field, which is one of the manifestations of regional stresses and tensions. Local geological structures, containing mineral deposits, are characterized by fields of stress and tension, brittle dislocations, and lineaments, superimposition and interaction of lineament fields of different types and scales in Earth’s crust and in time for general lineament field where its com¬ponents affect and distort each other. Therefore traditional methods, such as the lineaments density analysis and rose-diagrams drawing are unsuccessful in geological practice. Using physical modeling and mathematical filtration, we have developed a method that allows separation of lineament fields of different scales and nature. This method has been successfully tested on different scales in Siberia and Africa on the total area of more than 650000 km2 (250000 sq. miles).
Florida State University, USA
Keynote: Numerical study on groundwater flow cycling in the Woodville Karst Plain controlled by seawater intrusion to a Karst aquifer through a conduit network using CFPv2
Time : 10:00-10:35
Bill X Hu is the Professor of the department of Earth, Ocean & Atmospheric Science at Florida State University. He is also the Adjunct Faculty Member of the Department of Geosciences at Nanjing University He has done his Ph.D. from Purdue University in the year of 1996. He has more than 45 publications in many Journals.
Groundwater flow cycling in the Spring Creek spingshed and interaction between groundwater and seawater in the spring sub ground conduit is numerically simulated using the CFPv2, the latest research version of MODFLOW-CFP (Conduit Flow Process). Spring Creek Springs and Wakulla Spring located in a marine estuary and 11 miles inland respectively are two major groundwater discharge spots in theWoodville Karst Plain (WKP), North Florida, USA. A conceptual model for three repeating phases of groundwater flow cycle between the two springs and recharge from a major surface creek (Lost Creek) was proposed from a low rainfall period to a heavy rainfall period then back to a low rainfall period. Tracer tests and cave diving found a complex sub ground Karst conduit network connect the two springs. The flow rate, salinity and sea level at the Spring Creek Springs could significantly affect freshwater discharge and water stage at Wakulla Spring simultaneously. Based on the conceptual model, the groundwater flow model is developed using CFPv2 and calibrated by field measurements. Non-laminar flow, direct recharges in conduits, time-variable water stage at the submarine spring and flow exchange between conduits and porous medium are implemented in the numerical model. The developed numerical model is used to simulate the seawater intrusionand fresh groundwater contamination through the submarine spring’s conduit and its influence onthe inland spring discharge from June 2007 to June 2010. Simulated results of two spring’s discharges match reasonably well with measurements and quantitatively present the three-phase groundwater flow cycling. The regional flow field and relationship between inland spring and submarine spring are studied and evaluated as well in a prediction of sea level rise.