Sanjay Tewari

Combined effect of land subsidence and sea level rise poses a significant longterm threat of coastal land inundation. It jeopardizes infrastructure located in these areas. A detailed GIS method that adopts historical land elevation data of a region collected by a continuous monitoring and surveying network is discussed and detailed in this paper. Authors simulated the risks of land inundation for varying periods in future and identified at-risk infrastructure located in the affected area with the help of the GIS. The risks were forecasted for next 100 years, with 10-year increments starting from 2014. Some of the infrastructure assets located in some of the coastal areas of Gulf of Mexico were chosen as an example of at-risks assets for this study. Authorities such as state departments of transportation would use this approach in identifying the at-risk infrastructure and plan for their short-term and long-term response accordingly

Carbon based electrodes have been a popular choice among researchers to be used in capacitive deionization (CDI) cell because of the porous structure, high electrical conductivity and high surface area. These properties increased the effectiveness of CDI process by facilitating mass transport and adsorption of ions. Furthermore, regenerating exhausted electrodes through desorption process helps in reducing overall cost of the process. The efficiency of the CDI process can also be increased by modification of electrodes with metal or metal oxides of appropriate zeta potential. This study also explores ion removal and regeneration efficiency of carbon aerogel electrodes (unmodified and modified with TiO2/ZnO) under different conditions, achieved by varying experimental parameters such as flow speeds over electrode surface, temperature, ionic concentration and applied voltage. The modified surface of electrodes is being investigated for surface morphology, elemental analysis, cross-sections of coatings deposit, microstructures, thickness, pore size, and surface area

In the United States, the population density of coastal shoreline counties is over six times greater than the corresponding inland counties. In 2010, 123.3 million people, or 39% of the nation\u27s population, lived in counties directly on the shoreline. This population is expected to increase 8% from 2010 to 2020. The quality of the water in rivers that brings runoff water to coastal areas often does not reach the required standards to be used as a source for drinking water treatment plants due to technical and economic reasons. Therefore, groundwater is the preferred source to meet ever increasing water demand by growing populations in coastal areas. Higher groundwater withdrawal in coastal areas results in higher saltwater intrusion. This project explored electrokinetic barriers against saltwater intrusion at a lab-scale. Specific experimental procedures were adopted to have a uniform background among all experiments in order to focus on measurement of experimental variables. Efficacy of applied voltages, pH levels, and types of electrode materials were studied in creating a barrier that allows water and selected ions to pass through, but blocks certain ions in a way that reduces the salt intrusion and protects ground water. Porosity of sand, salt concentration, separation of electrodes, and water content of sand in experimental setup are some of variables that influenced the way experiments were conducted as a part of this study. The poster provides a graphic summary of experimental methods and results of this study