The Environmental Protection Agency is poised to update standards for dealing with stormwater under the Clean Water Act, and the agency should use those standards to promote green infrastructure.
As they are assessed for future use, it is critical to compare alternative indicators to conventional FIB under a range of stormwater delivery conditions.
Continuous field-monitoring data revealed the combined effects of rainfall depth, wind speed, solar radiation, and antecedent dry weather period to explain the measured stormwater retention under a humid subtropical rainfall regime.
Now, with cities and the county under the gun to implement stormwater management plans that are required under new permitting rules and could cost as much as $20 billion over the next 20 years, some of the supervisors want to make a new push.
Recognizing the environmental health threat of impervious surfaces as well as other point sources of pollution, the EPA established a stormwater permitting program under the National Pollutant Discharge Elimination System.
The upshot of this struggle is a consent order under which DC Water must dig enormous caverns - right under downtown DC - to trap the stormwater before it can get to, and overwhelm, their sewage treatment plant.
"The county and all of the cities are under some pretty expensive guns right now about stormwater," Supervisor Sheila Kuehl said.
Nassau County has two separate drainage systems -- one for rain and stormwater and another for sewage -- and under normal conditions they never meet.
The local government, which is under great pressure from the State to deal with its stormwater devils, wants the Pastor of the church to replace impermeable pavement with 2 acres of permeable asphalt.
In general, this paper emphasizes the need for the validation of stormwater harvesting systems, namely, the testing of treatment systems under challenging operational conditions using multiple indicators and reference pathogens.
