Evaluation of Best Management Practices for Highway Runoff Control (2006) / Chapter Skim
Currently Skimming:
Pages 6-21
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 6... ...
62.1 Introduction Performance evaluation and selection of a stormwater management system from among the many available options can be characterized in different ways. Control of water quantity, that is, control of the flow and volume of the runoff is always an aspect of stormwater management, if for no other reason than that flood control and management of drainage volumes and peak flows will always be a part of the drainage engineer's job.
|
From page 7... ...
7major unit operation in any selected treatment system design. Volume reduction is the essence of most LID approaches to stormwater management.
|
From page 8... ...
8the amount of stormwater that would otherwise be in the storm drain system and allows it to enter the system over an extended period of time. The soil moisture content determines the volume of stormwater that is retained and detained.
|
From page 9... ...
Fundamental Process Category (FPC) Unit Operation or Process (UOP)
|
From page 10... ...
10 include the system design parameters (e.g., volumes, dimensions, and bypass systems) , watershed location, size, slope, imperviousness, vegetative canopy, and soil type and compaction (Huber et al.
|
From page 11... ...
water chemistry are also important when attempting to achieve a projected effluent quality or removal fraction. In order to function well, devices (such as some proprietary BMPs)
|
From page 12... ...
12 practice of bioremediation. Example reactions include the following: • Oxidation of ferrous to ferric ions precipitates ferric hydroxides or phosphates.
|
From page 13... ...
toxics, and sufficient moisture. The pH also affects microbe populations because different species have different limits of pH tolerance.
|
From page 14... ...
14 Nutrient Category Chemical Species Assimilated Function Primary Nutrients Nitrogen NO3–, NH4+ Constituent of amino acids, proteins, enzymes, and chlorophyll. Important in photosynthesis, metabolism, and protoplasm reactions.
|
From page 16... ...
16 substance in one state is incorporated into another substance in a different state (e.g., liquids being absorbed by a solid or gases being absorbed by water)
|
From page 17... ...
competing solutes) of stormwater.
|
From page 18... ...
18 pore spaces to clog, pretreatment for particulates is essential for continued functionality of sorptive media. 2.3.6.2 Precipitation/Coagulation/Flocculation Precipitation, coagulation, and flocculation are three processes that occur simultaneously or in quick succession.
|
From page 19... ...
2.4 Characterization by BMP Type 2.4.1 Introduction Another common initial categorization measure for BMP systems is based upon system design, whether structural (constructed on site) , proprietary (pre-engineered)
|
From page 20... ...
20 constraints, and removal desired. A fair amount of research, both publicly (e.g., USEPA 1983)
|
From page 21... ...
(Taylor Associates 2002; Winkler and Guswa 2002)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.