Nonpoint source (NPS) pollution results from land runoff,
precipitation, atmospheric deposition, drainage, seepage or
hydrologic modification. The term "nonpoint source" is defined to
mean any source of water pollution that does not meet the legal
definition of "point source" from a specific origin. It is caused
by rainfall or snowmelt moving over and through the ground. As the
runoff moves, it picks up and carries away natural and human-made
pollutants, including excess fertilizers and pesticides from
agriculture, chemicals from industrial processes and mining, and
toxic microbes from animal or other waste. These are finally
deposited into lakes, rivers, wetlands, coastal waters and ground
waters, resulting in harmful effects on drinking water supplies,
recreation, fisheries and wildlife. This book presents a synthesis
of knowledge about, and responses to, nonpoint source pollution
through two key themes: the need for technical and policy solutions
that meet triplebottom-line sustainability (economic, social, and
environmental) and support for effective planning that enhances
food and water security for a growing human population. It
holistically evaluates the status of the problem of and solutions
to NPS internationally by reviewing the latest literature and
control technologies. It covers both urban and rural pollution from
runoff. Most other books on the subject are narrowly focused on one
perspective, such as agronomic or economic. However this book
provides an inter-disciplinary perspective, integrating information
from agriculture, soil science, hydrology, law, environmental
management and public policy, which will therefore serve as a text
for a wide range of courses.
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