Sentences with phrase «peak runoff»

Agriculture has changed the hydrograph increasing peak runoff flows and shortening the length of runoff.

Earlier peak runoff sweeps young salmon out of rivers into estuaries when they are smaller, and more vulnerable to predators.2, 9,10

The really shocking number, however, is the number that have already passed «peak runoff» before the present day.

Not exact matches

«Thus, annual glacier runoff volume typically increases until a maximum is reached, often referred to as «peak water.»»

Actions to reduce stormwater runoff in ways that allow water to infiltrate and move more slowly through the ground can also ease flooding and peak flows that otherwise threaten salmon redds.

«Many wetlands soak up runoff and floodwaters, which reduces peak flood - flows and avoids costly flood damage.»

The United States has trimmed excess fertilizer use since a peak in the 1990's, the scientists write, but runoff and releases from livestock operations still create big water problems, most notably the Gulf of Mexico «dead zone» resulting from nutrients washing from fields and livestock around the Mississippi River watershed.

People in Tilwari are fortunate to have access to a relatively clean source of water because of a fresh spring that's fed directly by runoff from the peaks of the Himalayas, but until a gravity - fed pumping system was installed recently, the water was exposed to whatever contaminants might be in the air and open for animals to share the same drinking source as people.

Runoff from non-glacier alpine basins peaks in May and June (Figure 1)(Stenborg, 1970).

Glacier runoff then represents 16 % of the total flow during this period, peaking at 24 % in August.

Peak spring runoff is also projected to continue to occur earlier — 20 to 40 days earlier by the end of the century.7, 12 Scientists project stream flow at The Dalles on the Columbia River to peak as much as a month earlier by mid - century.13 On the western slopes of the Cascades, runoff between April and September is projected to drop by 30 percent or more by mid - century.2Peak spring runoff is also projected to continue to occur earlier — 20 to 40 days earlier by the end of the century.7, 12 Scientists project stream flow at The Dalles on the Columbia River to peak as much as a month earlier by mid - century.13 On the western slopes of the Cascades, runoff between April and September is projected to drop by 30 percent or more by mid - century.2peak as much as a month earlier by mid - century.13 On the western slopes of the Cascades, runoff between April and September is projected to drop by 30 percent or more by mid - century.2, 14

Increases in winter and early - spring stream flow — followed by decreases in late spring, summer, and early fall — have already been observed over the past 50 years.6 Peak spring runoff is occurring anywhere from a few days to 25 - 30 days earlier throughout the region.7

Changing Alpine and Glacier Runoff: Glacier catchments generate freshets that last longer, larger and peak higher than other alpine catchments, the glaciers acting as efficient reservoirs.

For instance, earlier snowmelt may not change the total quantity of water available but can lead to earlier runoff that is out of phase with peak water demand in the summer.

As a result, the peaks in California's snow melt and surface runoff are likely to be more pronounced and to occur earlier in the calendar year, increasing the duration of the warm - season low - runoff period and potentially reducing surface soil moisture.

For example, the peak spring runoff is happening more than 20 days earlier in rivers and streams across the American West.

But glaciologist Michel Baraer of McGill University in Canada estimates that runoff has already peaked and is now in decline.