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 ------------------------------------------------------------------------------------------------------------- I.A.H.P. International Association of Hydroseeding Professionals. IECA International Erosion Control Association Impermeable material A soil or material whose properties prevent movement of water through the material Impervious surface Hard ground cover that prevents or retards the entry of water into the soil and increases runoff, such as asphalt, concrete, rooftops Index Test A test procedure that may contain a known bias but which may be used to establish an order for a set of specimens with respect to the property of interest Indian Country Defined at 40 Code of Federal Regulations (CFR) 122.2 to mean: All land within the limits of any Indian reservation under the jurisdiction of the United States government, notwithstanding the issuance of any patent, and, including rights-of-way running through the reservation; All dependent Indian communities with the borders of the United States whether within the originally or subsequently acquired territory thereof, and whether within or without the limits of a state; and All Indian allotments, the Indian titles to which have not been extinguished, including rights-of-ways running through the same. Indirect Discharge The introduction of pollutants into a municipal sewage treatment system fro any nondomestic source (i.e., any industrial or commercial facility) regulated under Section 307(b), (c), or (d) of the CWA. Industrial Sources Non-municipal, or industrial sources, often generate wastewater that is discharged to surface waters. The types of wastewaters generated at a facility depend on the specific activities undertaken at a particular site, and may include manufacturing or process wastewaters, cooling waters, sanitary wastewater, and stormwater runoff. Infiltration The portion of rainfall or surface runoff that moves downward into the subsurface rock and soil Inflorescence The flowering part of a plant. 1 2