Freshwater is one of our nation's most precious resources. Not only do we drink it, but we water food with it and use it for recreation. However, it is being threatened by nonpoint source pollution. Nonpoint source pollution is caused by water collecting pollutants on or in the ground as it migrates to lakes, rivers, or aquifers. In the worst case, the water becomes completely unusable.
The authors begin by explaining the hydrologic cycle in minute detail. Because it is difficult to understand the paths of pollution without first understanding the paths of water, figures assure that the reader understands the termonology and concepts behind the science. The authors describe different ways water may become contaminated. They explain the consequences and characteristics of different types of pollution.
The report presents four case studies of cities that confronted their pollution problems. Each study illustrates the success that awaits cities and towns that embrace pollution control.
A small glossary and ordinance language complete the book. It's filled with figures and photos. The material is accessible to all interested citizens, not just planners or scientists.
The second case study describes a storm water diversion project and could really have been helped with a diagram of the system. The supplied figures 3-2 and 3-3 show a basic landscape and an area map-- not very helpful to understand the diversion system.
I like the overview of watershed hydrologic resources, sources of contamination and the ways pollution can be transported. It gives all the basics that you might not be aware of when you're focusing on strictly the policies. Effective policies need to be based on the science behind this type of pollution.