Voracious predator could be big threat to native aquatic populations

Erosion on the banks of the Koyukuk River is increasing in the community of Evansville and Bettles.

Kuskokwim River flooding causes concern in community

Ruben Henry won't ever forget the day the Chandalar River ran red along the banks of Arctic Village. It was the talk of the tight-knit, Brooks Range town, and no one had could remember it ever happening before.

Thirty-two musk oxen carcasses were found March 15 by scientists who had been studying them. The animals were dead and entombed in ice. The belief is that the musk oxen either drowned during a February thaw or became trapped in water and died after it froze.

ANCHORAGE, Alaska - Swollen with recent rains, the Matanuska River has launched another erosive assault on properties along its banks. But unlike previous years, when the river attacked properties downstream,

Cyanobacteria blooms usually occur in summer.

Anchorage anglers got good news this week when Fish and Game reported that pesticide applied to Cheney Lake last October in an effort to wipe out invasive northern pike appears to have worked.

With a sickening thud, another hefty and handsome salmon lands in the waste barrel, headed for the dogs .

Some residents in B.C.'s Central Interior are being told to avoid drinking or bathing in their tap water following an outbreak of potentially toxic algae blooms.

Water levels in rivers, lakes and reservoirs across western Europe are running low, or even dry, amid the severest drought in decades which is putting stress on drinking water supplies, hampering river freight and tourism and threatening crop yields.

Interior communities are shoring up dikes and roadways in preparation for another atmospheric river system expected Tuesday and into Wednesday. Officials say they are making progress helping displaced residents access services and are taking steps to save homes from further flood damage.

The Dongjiang River, which provides more than 90 percent of the water consumed in Shenzhen, is facing the severest drought since 1963, the year with the lowest precipitation recorded in the city. The water level in the three main water reservoirs is now more than 55 percent lower than in previous years according to Zhang Jian'an, Shenzhen water resources authority official, media reported.

While ice thickness normally measures between 11 and 22 inches on local lakes and ponds, ice thickness recently ranged between 9 and 19 inches, according to the National Weather Service’s ice thickness measurements.

In northern Alaska, an amphitheater of frozen ground thaws where a northern river cuts into it, exposing walls of ice. The feature, known by scientists as “yedoma,” is the largest of its kind yet found in Alaska. A great wall of ice holds a lot of treasures from the past, which science is eager to explore.

"For our grandchildren and their children, now the devastation has left them nothing": Shackan First Nation Chief Arnold Lampreau.

Yukon Energy is again asking for permission this year to lower the level of Marsh Lake, in anticipation of possible flooding this summer.

The northern Canadian city of Iqaluit declared a state of emergency on Friday after scarce rain this year left water levels in the local Apex River at a four-decade low.

The N.W.T.'s Marine Transportation Services has announced it is cancelling barges to Norman Wells and Tulita due to low water levels.