Sentences with phrase «snowmelt events»

Concentrations in the groundwater were typically at least one order of magnitude lower than the concentrations in the treatment plant effluent, suggesting that the soil generally acted as an effective biogeochemical filter, except during snowmelt events.

Not exact matches

Due to deficiencies in the sewer collection system and lack of treatment capacity, wet weather events such as rain or snowmelt generate more wastewater than the plant can handle.

They are: cloudburst events (2001, 2003, 2007, 2008, 2009, 2010, 2011), prolonged droughts (1999 - 2002), historic river flooding (2010), tropical cyclones (1999, 2007, 2009, 2010, 2011), severe urban flooding (2001, 2003, 2007, 2008, 2009, 2010, 2011), heatwaves in spring (2006, 2007, 2010), snowmelt flooding (2005, 2007, 2010) and drought at sowing stage (2004, 2006, 2007, 2009, 2010, 2011).

Large - scale flooding can also occur due to extreme precipitation in the absence of snowmelt (for example, Rush Creek and the Root River, Minnesota, in August 2007 and multiple rivers in southern Minnesota in September 2010).84 These warm - season events are projected to increase in magnitude.

Likely aggravating factors included snowmelt from the warm temperatures of the event and already - saturated soils from heavy rains several weeks earlier.

In addition, climate change is very likely to lead to more frequent extreme heat events and daily precipitation extremes over most areas of North America, more frequent low snow years, and shifts towards earlier snowmelt runoff over much of the western US and Canada (high confidence).