Flood Plain Land Use Controls Archives • Page 3 of 4 • ZoningTrilogy.com

Impervious Ground Cover

Any building, pavement, or other material that substantially bars the natural infiltration of surface water into the soil. Manufactured materials that meet the City’s design standards shall not be considered impervious ground cover.

To access the rest of this content, you must purchase a subscription.

Obstruction In a Floodway

Any object in, along, across, or projecting into any portion of the floodway which may impede, retard, or change the direction of the flow of water, either in itself or by catching or collecting water-borne debris, or that is placed where the flow of water would carry the same downstream to the damage or detriment […]

To access the rest of this content, you must purchase a subscription.

Stormwater

The net increase in run-off from urban development due to water not being able to seep into the ground because of impervious surfaces, such as roofs and roads.

To access the rest of this content, you must purchase a subscription.

Stormwater Network

A system of stormwater pipes, open channels, devices and associated ancillary structures used for the purpose of conveying, diverting, storing, treating, or discharging stormwater.

To access the rest of this content, you must purchase a subscription.

Stream Channel

An area which demonstrates evidence of the passage of water. The depression between the banks worn by the regular and usual flow of the water. The channel need not contain water year-round. This definition does not include irrigation ditches, canals, storm or surface water runoff devices, or other entirely artificial watercourses.

To access the rest of this content, you must purchase a subscription.

Streamflow Diversion

The impoundment and diversion of streamflow to pipes or channels, for the purpose of offstream use of water.

To access the rest of this content, you must purchase a subscription.

Surface Water

Any freshwater waterbody located above the ground surface including lakes, rivers, streams, springs, water impounded by dams and wetlands.

To access the rest of this content, you must purchase a subscription.

Top of Bank

A point or line which is the beginning of a significant change in the land surface, thence from which the land surface slopes downward towards an abandoned or existing water course. When two or more slopes are located together, the slope that is highest and farthest away from the watercourse shall be the slope considered […]

To access the rest of this content, you must purchase a subscription.

Top of Streambank

The upper edge of the slope of the stream valley where the land levels off, or where there is a flood plain, to the top of the slope above the floodplain.

To access the rest of this content, you must purchase a subscription.

Water Storage Dam

A dam constructed for the purposes of impounding water for water supply purposes.

To access the rest of this content, you must purchase a subscription.

Zoning Dictionary

Category: Flood Plain Land Use Controls