桃花直播鈥檚 Vahedifard examines 鈥楲essons from the Oroville dam鈥 in Science
Contact: Allison Matthews
STARKVILLE, Miss.鈥擜 letter in Science magazine from a 桃花直播 State faculty member is examining lessons gleaned from the recent Oroville dam incident in California.
The says recent incidents, including a massive hole in the dam鈥檚 primary spillway and excessive erosion in the 桃花直播 spillway, along with a levee breach near Manteca, 鈥渃learly demonstrate how extreme events, land-cover and land-use changes, and the emerging climatic changes can threaten the integrity of our aging dams and levees.鈥
Farshid Vahedifard, an 桃花直播 Bagley College of Engineering assistant professor of civil and environmental engineering, penned the letter, along with 桃花直播 doctoral student Shahriar Shahrokhabadi and civil and environmental engineering colleagues from the University of California, Irvine, including Amir AghaKouchak, Elisa Ragno and Iman Mallakpour.
The letter in Science notes that the Oroville dam incident occurred when the wettest year on record (as of mid-rainy season) followed a record-setting five-year drought. The authors assert, 鈥淲e need to reevaluate failure probability of all major dams and levees under multi-hazard scenarios. Ignoring the underlying relationships between multiple events can lead to underestimation of extreme events and their impacts.鈥
The nation鈥檚 dams and levees received a grade of 鈥淒鈥 in the American Society of Civil Engineers鈥 2017 , meaning they are in poor to fair condition and mostly below standard, with many components near the end of their service life.
Vahedifard studies how a variety of hazardous conditions, including droughts, heavy rainfall, high temperatures, high levels of air moisture and other natural conditions may affect critical infrastructure, including levees and dams. However, his research interests also include how urban development and other anthropogenic activities may intensify the impact of natural hazards on various infrastructure and increase the likelihood of damage during climatic events.
鈥淭hese are very important issues that need to be studied closely so that we can begin to close the gap in our understanding in terms of uncertainty in climatic extremes under a changing climate and their impacts on the resilience of infrastructure. We should incorporate research findings into engineering practice for evaluating existing infrastructure, as well as planning and designing future infrastructure,鈥 Vahedifard said.
Vahedifard, principal investigator of a $212,000 National Science Foundation grant, is leading a three-year collaborative and interdisciplinary research project to quantitatively assess the performance of critical geotechnical infrastructure, including natural and engineered earth structures like levees, to climatic extremes and natural hazards under current and changing climatic conditions. The outcome is expected to increase understanding about the resilience and reliability of infrastructure under current climate trends.
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