When light shines through water, colors with longer wavelengths are absorbed by the water, with the longest wavelengths absorbed first. Blue and violet have the shortest wavelengths of visible light, so they are able to penetrate the deepest.
During major floods, thousands of tiny fish convene at Luvilombo Falls in the upper Congo River Basin to undertake a peculiar vertical migration, described for the first time today in Scientific Reports.
The Colorado River is an interconnected system, sustained by Rocky Mountain snowpack, rainfall and groundwater. It is fragile, and under increasing stress. Two and a half decades into this century, the river that built the modern West has 20% less water flowing through it than it did on average in the last century. As heat and drought intensify, so do the stakes: Failure to recognize the severity of changing conditions, managing the river in parts without considering needs of the whole and inadequate planning for long-term shortages put the future of all the basin at risk.
Along coastlines, where tides are typically magnified, they profoundly affect navigation, commerce, coastal flooding, water properties and sediment transport. Tides impact the flooding of rivers and, thus, influence the extent of their floodplain, which has cascading effects on biogeochemical and ecological processes.
Over time, the water evaporated to form the smaller, brinier Owens Lake. Indigenous Paiute people call the Owens Valley Payahuunadü, 'the land of the flowing water'. Today, Owens Lake is a 'Dusty Vestige of the Old West', as NASA described a photograph of the lake taken from space.
I believe that in the absence of a unanimous agreement, [the Interior Department] should renew the existing agreements for five years, and then we should start all over. We should scrap the entire process and invent a new one.
The government said the plans would increase the number of England's official bathing sites to 464. An official bathing spot on the Thames in London would mark a "vast transformation" in water quality in the river which was declared biologically dead in the 1950s due to pollution, officials said. Water minister Emma Hardy said rivers and beaches were "at the heart of so many communities, where people come together, families make memories and swimmers of all ages feel the benefits of being outdoors safely".
Lake Superior was named the cleanest in the country thanks to its oxygen rich, clear water and low mineral content, according to a study by Fishbox, a fishing forecast platform. Lake Superior, which flows into Michigan, Minnesota, and Wisconsin, is also renowned for its fishing: ice fishing in the winter and summer catches that include bass, salmon, trout, and walleye.
Whenever I'm asked about my recent trip to Alaska-a journey to visit Katmai National Park & Preserve and Kenai Fjords National Park-I nearly always mention the scale. The scale of the glaciers, the mountains, the sunsets, and the utter wilderness; every aspect of the landscape was just so much larger and more grand than anything I'd ever experienced. Magnitude is a continuous theme all across Alaska.
They're special on a world stage, 85% of chalk streams are in England. They're wonderful habitats, they're great for people as well, people really enjoy them, whether it's areas like this where you can find kingfishers and grey wagtails and it's just a unique resource that we really should steward properly.
Specifically, I take people around downtown Seattle to explore the stone that makes up our buildings. On the corner of Second Avenue and Cherry Street is an elegant six-story structure built with two-foot-tall blocks of rough-hewn sandstone, about 44 million years old, quarried in Tenino, Washington. The building rose soon after much of downtown Seattle burned to the ground in 1889, and the jagged stone gives it a feeling of rugged permanence, certainly what the city needed after the great fire.
Western water law is based on the prior appropriation doctrine, which gives the first entity to make "beneficial use" of water the right to keep on using that amount, even if that means that upstream "junior" users' spigots will get shut off. By the early 1900s, a rapidly growing California was enthusiastically diverting the Colorado River, with huge irrigation districts gobbling up the senior water rights.
Wildlife populations are in decline. Recreation sites are crowded and often underfunded. Wildfires are larger, more destructive and harder to control. Climate change is reshaping natural systems, from ocean fisheries to mountain snowpacks, faster than institutions can respond. At the same time, communities are being asked to host new energy projects, transmission lines and mineral development - often without clear processes, adequate resources or trust that decisions are being made in the public interest.
The question of how to protect fish and the ecological health of rivers that feed California's largest estuary is generating heated debate in a series of hearings in Sacramento, as state officials try to gain support for a plan that has been years in the making. "I am passionate that this is the pathway to recover fish," said state Natural Resources Secretary Wade Crowfoot. "This is the paradigm we need: collaborative, adaptive management versus conflict and litigation."
Recently, while sailing with friends on San Francisco Bay, I enjoyed the sight of harbor porpoises, cormorants, pelicans, seals and sea lions and then the spouting plume and glistening back of a gray whale that gave me pause. Too many have been seen inside the bay recently. California's gray whales have been considered an environmental success story since the passage of the 1972 Marine Mammal Protection Act and 1986's global ban on commercial whaling. They're also a major tourist attraction during their annual 12,000-mile
In the small town of Chipaya, everything is dry. Only a few people walk along the sandy streets, and many houses look abandoned some secured with a padlock. The wind is so strong that it forces you to close your eyes. Chipaya lies on Bolivia's Altiplano, 35 miles from the Chilean border. The vast plateau, nearly 4,000 metres above sea level, feels almost empty of people and animals, its solitude framed by snow-capped volcanoes. It raises the question: can anybody possibly live here?
