Groundwater quality could be influenced by different sources of pollution such as domestic waste water, urban runoff, intensive application of fertilizers and solid waste disposal (Hammouri and El-Naqa 2008).
This section of the river contains the highest pollution level as it collects many sources of organic and inorganic contaminants, including runoffs from intensive agriculture and industry outlets, the heavily polluted Aniene river tributary and the city sewage outlets.
The contaminant concentrations in runoff from both intensive and extensive green roofs generally decreased during the study period.
Working in Elkhorn Slough, central California, where intensive farming practices generate considerable runoff of fertilizers and pesticides, we looked first for long- and short-term trends among temporally ephemeral point data for nutrients and other water quality characters collected monthly at 18 water sampling stations since 1988.
The Senate bill is co-sponsored by the Democratic senator Mary Landrieu, who faces a bitter battle to hang on to her seat in the energy-intensive state of Louisiana during runoff elections next month, and has made a campaign pledge to distance herself from the president on the issue.
In general, there were no statistically significant differences between the rainfall and runoff parameters for the intensive and extensive beds except for peak attenuation and peak runoff delay, for which higher values were recorded in the intensive beds.
Water pollution has not been extensive (mainly because of the paucity of heavy industry and of mass manufacturing), but effluents from food- and fish-processing plants, manure, pesticide, and fertilizer runoff, and soil erosion from intensive potato cultivation, as well as oil leakage and sedimentation, have collectively seriously degraded some water resources.
The phosphorus loss by surface runoff was focused at an intensive rainfall period (summer).
Due to climate change and intensive human activities in recent decades, the runoff of many rivers in the world has been changing.
The data incorporated in the developed method are easy to obtain from satellite images and by utilizing GIS techniques without the need for intensive field visits or relying on historical runoff records.
