What is defined as land between the pier-head line and the bulkhead line?

The correct choice identifies "land under water" as the area defined as land between the pier-head line and the bulkhead line. This area typically refers to submerged land that is owned by the state or local government and is often governed by specific regulations regarding its use and development.

The pier-head line is established to mark the outer limit of a pier or wharf, while the bulkhead line generally marks the point where land has been filled or otherwise modified to create usable space along the waterfront. Therefore, the space in between these two lines represents a zone of water that is not directly utilized for construction or development purposes, but still holds significance in terms of environmental management and water rights.

The other options refer to different types of land management concepts. Riparian land relates to land adjacent to a body of water, particularly rivers or lakes, which typically involves rights to the water and land. Wetlands refer specifically to areas where the soil is saturated with water, either permanently or seasonally, but not all lands between the pier-head and bulkhead lines are wetland areas. Subaqueous land refers to land that is submerged underwater but does not exclusively signify the space between the pier-head and bulkhead lines, as that could encompass specific ownership or rights issues