Dams

“Hey Rupam, open the door. Take this fish,” a woman yelled from outside. I was sitting in the kitchen at my friend Rupam’s house in rural northeast India. It was the heart of monsoon season, and rain had been falling since morning. The woman must have been shouting because the noise of the rain on the tin roof muted everything else. The aunty who lived next door stood outside with a large bowl of Boriala fish. Her husband had gone fishing on the Subansiri River, which flows next to the village, and he had fished all evening. “My husband cannot stay indoors in this weather,” she said in Assamese, the local language. “You can catch a lot of fish during this time.” The monsoon season has long brought a bounty of fish from May to September for people living downstream. However, this is likely to change once the Subansiri Lower Hydroelectric Project, one of the largest hydropower dams in India, is completed upstream. Expected to be fully op...

Summer and fall are prime times for getting outdoors across the U.S. According to an annual survey produced by the outdoor industry, 55% of Americans age 6 and up participated in some kind of outdoor recreation in 2022, and that number is on the rise. However, the activities they choose are shifting. Over the past century, participation has declined in some activities, such as hunting, and increased in others, like bird-watching. These shifts reflect many factors, including demographic trends and urbanization. But outdoor activities also have their own cultures, which can powerfully affect how participants think about nature. As scholars who think about organizational theory, management and entrepreneurship, we are interested in understanding effective ways to promote social change. In a recent study, we analyzed the work of the nonprofit group Trout Unlimited, which centers on protecting rivers and streams across the U.S. that harbor wild and native trout and salmon. We f...

Heavy rainfall generated widespread flooding. in the Upper Midwest in late June 2024, putting at least one aging dam at risk. In southern Minnesota, the Blue Earth River cut a path around the Rapidan Dam in Rapidan Township, about 15 miles south of Mankato, on June 24, putting the structure at imminent risk of failing. Officials warned local residents that if the dam burst, the river could rise by 2 feet, but said that evacuations were not needed. This event comes a year after flooding in Vermont collapsed at least one dam and threatened others. Hiba Baroud, associate professor and associate chair in the department of civil and environmental engineering at Vanderbilt University, explains how flooding stresses dams in a changing climate. How serious is the risk when water flows over or around a dam? These conditions can result in erosion, which subsequently could lead to a dam breach or failure and a sudden, uncontrolled release of impounded water. The risk reflects the combin...

The Klamath River runs over 250 miles (400 kilometers) from southern Oregon to the Pacific Ocean in Northern California. It flows through the steep, rugged Klamath Mountains, past slopes of redwood, fir, tanoak and madrone, and along pebbled beaches where willows shade the river’s edge. Closer to its mouth at Requa, the trees rising above the river are often blanketed in fog. The Klamath is central to the worldviews, history and identity of several Native nations. From headwaters in Klamath, Modoc and Yahooskin-Paiute lands, it flows through Shasta, Karuk, Hupa and Yurok homelands. The Yurok Tribe has legally recognized the personhood of the river. Historically, the Klamath was the third-largest Pacific salmon-producing river on the West Coast. The river supported abundant and diverse runs of native fish, including Chinook and coho salmon, steelhead trout, Pacific lamprey, green sturgeon, eulachon smelt and coastal cutthroat trout. Most of the Klamath in California has...

As rising global temperatures make extreme storms more common, the nation’s dams and reservoirs – crucial to keeping communities dry – are being tested. Storms in the U.S. Northeast stretched the region’s flood control systems nearly to the breaking point in July 2023. California and states along the Mississippi River faced similar flood control challenges in 2023. Managing these flood control systems is a careful balancing act. Do managers release water to make room for the storm’s runoff, increasing the risk of flooding downstream, or hold as much as possible to protect downstream farms and communities, which could increase the chance of larger floods if another storm comes through? The earlier decisions can be made, the better the chance of avoiding downstream damage. But forecasts aren’t always reliable, and waiting for the rain to fall may mean acting too late. Satellite water vapor imagery from July 9-11, 20...