This permanent cover also keeps agricultural run-off from polluting potholes and marshes.
Not only do the wetlands filter the agricultural run-off; they also reduce flooding on farmers’ fields, since the water has a place to go.
(Non-point sources are usually small, diffuse sources, such as runoff from agricultural land.)
The phosphates come mainly from agricultural runoff into streams and rivers that feed into the bay.
Of course, there is the whole issue of agricultural fertilizers and runoff from agricultural lands that gets into the waterways, and of course that is a problem.
Phosphorus and nitrogen from human activity enters Lake Winnipeg through municipal and industrial wastewaters, agricultural runoff, and air pollution.
Phosphorus and nitrogen from human activity enters Lake Winnipeg through municipal and industrial wastewaters, agricultural runoff, and air pollution.
Awareness of risks from agricultural runoff on water quality and public safety has led to an emphasis on careful riparian management in the Atlantic region.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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