Glossary

The erosion control world is filled with a variety of different terms and phrases that may mean one thing to a seasoned veteran but make no sense whatsoever to someone who is just starting out. ErosionControlNetwork.com has comprised a database of many of these phrases and their definitions to help you gain a better understanding of erosion control terminology. How To Use: Click a letter below to see phrases starting with that letter, or enter your word into the text box below and click the Search button. Search by Alphabet A B C D E F G H I J K L M N O P Q R S T U V W X Y Z or Search by Keyword All Search Results are Displayed Below Can't Find A Term? If there are any terms or phrases that are not in our database that you think should be, please click on the button below. We will process your request as soon as possible.

Glossary Results ------------------------------------------------------------------------------------------------------------- Palea The inner bract of a floret; the bract enclosing the crease side of a kernel or the bract opposite the lemma. Palisade A barrier Perched beach A beach retained above the otherwise normal profile level by a submerged sill Perennial plant A plant that may or may not start from seed, may or may not produce seed, and requires more than two years to complete its life cycle. Performance Test A test that simulates as closely as practicable selected conditions experienced in the field and which can be used in design Permanent Rolled Erosion Control Products For applications where natural vegetation alone will not sustain expected flow conditions and/or provide sufficient long-term erosion protection, furnish a permanent rolled erosion control product with the necessary performance properties to effectively control erosion and reinforce vegetation under the expected long-term site conditions Permitting Authority The United States Environmental Protection Agency (EPA), a Regional Administrator of the Environmental Protection Agency, or an authorized representative. Under the Clean Water Act, most states are authorized to implement the NPDES permit program. State Authorization Process describes the process for authorizing states to implement the NPDES permit program. pH A measure of the hydrogen ion concentration of water or wastewater; expressed as the negative log of the hydrogen ion concentration in mg/l. A pH of 7 is neutral. A pH less than 7 is acidic, and a pH greater than 7 is basic. Photodegradable Materials that are not resistant to ultraviolet radiation and therefore break down relatively quickly when exposed to sunlight Pile A long, heavy timber, pipe, or section of concrete or metal to be driven or jetted into the earth or seabed to serve as a support for a bulkhead 1 2 3 4