Sentences with phrase «decreased runoff»

Although these hydrological changes could potentially increase soil water availability in previously snow - covered regions during the cool low - ET season (34), this effect would likely be outweighed by the influence of warming temperatures (and decreased runoff) during the warm high - ET season (36, 38), as well as by the increasing occurrence of consecutive years with low precipitation and high temperature (Fig. 4A).

Increased droughts and forest fires, decreased runoff, loss of wildlife habitat, and rising air pollution are all signs of a climate out of control.

Temperature rise increases evaporation and decreases runoff, but has been found to cause an increased rate of runoff in winter and a decrease in spring.

According to http://rsta.royalsocietypublishing.org/content/369/1934/85.full my area is likely to see 30 % lower precipitation in DJF (that's when it rains here) and warmer temperatures, decreasing runoff more.

Not exact matches

Rules limiting nutrient runoff from farms and wastewater treatment plants helped to decrease nitrogen concentrations in the bay by 23 percent since 1984.

«Use of the nanoparticle increases soil diffusion while decreasing the risk of leaching and runoff, reducing the amount of chemical in food crops and reducing the cost to treat crops.»

This decreases natural storm runoff during high - flow winter months while contributing proportionately more water to streamflows during the drier months that make up about 80 percent of the region's calendar year.

The cores showed an increase in abundance of grass in the same sediments that showed a decrease in surface runoff.

To stave off a complete collapse of gulf fisheries and shrimp populations, Scavia finds, the dead zone must shrink drastically, to 2,000 square miles or less — and for that to happen, agricultural nitrogen runoff will have to decrease by at least 40 percent.

A 2016 report by the Bureau of Reclamation predicts that the basin's snowpack is likely to decrease, stemming the flow of runoff in spring and early summer.

Study team member Robert Dudley says global warming could be involved but that the aim of the study was only to determine whether snowmelt runoff into rivers was increasing or decreasing; it will be up to other scientists to examine what factors might be responsible for the trend they found.

Similarly, stormwater runoff, decreased evaporative cooling, and building damage from soil contraction and expansion are just a subset of how precipitation impacts will affect human systems.

* Over the last decade or two, rainfall has been markedly below average in our temperate south - west, south and east, and this along with increased average temperatures has caused a major decrease in runoff from our catchments.

Availability of resources such as usable water will also depend on changing rates of precipitation, with decreased availability in many places but possible increases in runoff and groundwater recharge in some regions like the high latitudes and wet tropics.

One of their greatest uses is in fact their ability to reduce the volume of surface runoff which decreases the risk of floods in case of heavy precipitation.

There was less rainfall over land, and a record decrease in runoff and ocean discharge into the ocean from October 1991 to September 1992, the scientists report this week in the journal Geophysical Research Letters.

However, almost all climate change projections predict increases in temperature and decreases in Colorado River runoff [Vano et al., 2014].

Quantifying the contribution of climate - and human - induced runoff decrease in the Luanhe river basin, China

Average annual runoff decreasing 20 - 40 percent in the Danube, Mississippi, Amazon and Murray Darling river basins

Decreased maize yields and runoff, increased long - lasting drought and more favourable conditions for malaria transmission are greatest over drylands if global warming were to rise from 1.5 °C to 2.0 °C.

An ecoroof significantly decreases stormwater runoff, saves energy, reduces pollution and erosion, and helps preserve fish habitat.

The Canon del Plata hydropower project would experience a decrease from 1540 gigawatt - hours to 1250 gigawatt - hours for a 50 % glacier runoff reduction and decline to 970 gigawatt - hours for a 100 % glacier loss (Vergara et.

In Thunder Basin runoff has in contrast decreased negligibly, 4 %.

Eventually the resulting decline in glacier extent reduces the area available for melting causing a decrease in glacier runoff.

A continuing trend in glacier loss will seriously decrease the water reserves stored as ice, reducing melt season runoff.

However, a large majority of streams in glaciated basins in BC showed a statistically significant decrease in August streamflow during 1976 to 1996, which suggests that these glaciers even with increased melt rates are providing less runoff (Stahl and Moore, 2006).

Glacier runoff does not increase or decrease the long term runoff for a basin, total runoff over a period of several years is determined largely by annual precipitation.

This map shows predicted increases in runoff in blue, and decreases in brown and red.

We summarized how important factors that are not directly modeled may increase or decrease the range or runoff due to thinning that is documented in this study in File S3.

The model predicted runoff increases in a linear fashion with winter precipitation and basal area reductions, and decreases linearly with years since treatment (Figure 3).

The effect is measurable: for example, reduced runoff from snow melt has caused an annual 5 percent decrease in the amount of water entering the Colorado River, which experts say already faces the risk of significantly drying up.

By mid-century, annual average river runoff and water availability are projected to increase by 10 - 40 % at high latitudes and in some wet tropical areas, and decrease by 10 - 30 % over some dry regions at mid-latitudes and in the dry tropics, some of which are presently water - stressed areas.

Bouraoui et al. (2004) showed, for southern Finland, that the observed increase in precipitation and temperature was responsible for a decrease in snow cover and increase in winter runoff, which resulted in an increase in modelled suspended sediment loads.

Where precipitation decreases were projected, the results were more complex due largely to interactions between plant biomass, runoff, and erosion, and either increases or decreases in overall erosion could occur.

soil erodibility changes due to a decrease in soil organic matter concentrations (which lead to a soil structure that is more susceptible to erosion) and to increased runoff (due to increased soil surface sealing and crusting);

Snow runoff (and the resulting decrease in electricity prices) is a yearly event that usually awaits the spring thaw.

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

However, no anthropogenic influence can be detected for 1 - day and 3 - day surface runoff, as increases in extreme precipitation in the present - day climate are offset by decreased snow cover and lower frozen water content in soils during the May — June transition months, compared to pre-industrial climate.

It is perfectly conceivable, for example, to have annual precipitation increase 10 to 20 % at the same time that mean annual surface water runoff decreases by 10 to 20 % (or even more).

3) Summer runoff has decreased markedly, 27 %, in the non-glacier Newhalem basin with the earlier melt of reduced winter snowpack.

Several studies focused on the Colorado River basin showed that annual runoff reductions in a warmer western U.S. climate occur through a combination of evapotranspiration increases and precipitation decreases, with the overall reduction in river flow exacerbated by human demands on the water supply.

What the report says about climate change and the Colorado River: The southwestern United States is projected to experience significant decreases in surface water availability, leading to runoff decreases in California, Nevada, Texas, and the Colorado River headwaters, even in the near term.

The eruption of Pinatubo was followed by a significant drop - off of rainfall over land and a record decrease in runoff and freshwater discharge into the ocean, according to a recent study by Trenberth and other scientists.

Shows that during the 1974 — 2004 period, the stability of the mean discharge on the main stem in Óbidos is explained by opposite regional features that principally involve Andean rivers: a decrease in the low stage runoff, particularly important in the southern regions, and an increase in the high stage runoff in the northwestern region

Many basins in the tropical Andes have experienced an increase in runoff in recent decades, while precipitation has remained almost constant or has shown a tendency to decrease (Coudrain et al., 2005).

While these dead zones are often caused by fertilizer runoff currently, it seems the decreasing ability of the oceans to hold dissolved oxygen with continued warming will increasingly become a problem for marine ecosystems and fisheries in the coming decades.

This expansion of OMZs is due to nutrient runoff makes the ocean more vulnerable to decreasing solubility of O2 in a warmer ocean.

A wide variety of modeling efforts have yielded results that suggest, for each 1 °C increase in temperature, runoff will decrease from 2 — 8 % in the Colorado River basin (67).

The impacts of runoff and soil moisture deficits associated with warm temperatures can be acute, including enhanced wildfire risk (21), land subsidence from excessive groundwater withdrawals (22), decreased hydropower production (23), and damage to habitat of vulnerable riparian species (24).

What's more, our buildings can literally begin to come alive: green walls and rooftop gardens not only suck carbon out of the air, but they also can provide healthy local produce, can reduce storm water runoff, and can decrease the urban heat island effect.