Debris Entities from Shoreline Surveys

Descriptive Mission name

Description of notable aspects of mission

Midway Marine Debris Removal: all shore-based mission at Midway Atoll

NWHI Marine Debris Removal: Midway component to a ship-based NWHI debris mission

Unidentifiable, hard plastic fragments, 10 cm or larger

Unidentifiable, plastic foam fragments, 10 cm or larger

Unidentifiable thin flexible fragments of plastic or other material, 10 cm or larger

Identifiable, packaging for food, independent of size

Identifiable, plastic bottles, independent of size

Identifiable, plastic containers other than beverage bottles, independent of size

Identifiable, plastic bottle caps, independent of size

Identifiable, cigar tips, independent of size

Identifiable, cigarettes, independent of size

Identifiable, lighters, independent of size

Identifiable, plastic six pack rings, independent of size

Identifiable, plastic bags, independent of size

Identifiable, hard plastic buoys or floats, independent of size

Identifiable, fishing lures (with lines), independent of size

Identifiable, plastic cups or dishes, independent of size

Identifiable, plastic utensils, independent of size

Identifiable, plastic straws, independent of size

Identifiable, plastic balloons, independent of size

Identifiable, plastic personal care products (toothbrushes, brushes, etc.), independent of size

Identifiable, plastic toys, independent of size

Identifiable, other plastics, independent of size

Identifiable, rubber-like slippers, independent of size

Identifiable, rubber-like gloves, independent of size

Identifiable, tires, independent of size

Unidentifiable, rubber fragments, 10 cm or larger

Identifiable, other rubber debris, independent of size

Unidentifiable, paper cardboard, 10 cm or larger

Identifiable, paper bags, independent of size

Identifiable, clothing and shoes (mostly shoes are identified), independent of size

Identifiable, non-rubber gloves, independent of size

Identifiable, towels or rags, independent of size

Unidentifiable, fabric pieces, 10 cm or larger

Identifiable, other fabric, independent of size

Identifiable, plastic foam buoys or floats, independent of size

Plastic rope or smaller pieces of net, when compressed is smaller than 6 cubic inches

Plastic rope or smaller pieces of net, when compressed is larger than 6 cubic inches and smaller than 7,072 cubic inches (size of a large action packer)

Plastic rope or smaller pieces of net, when compressed is larger than 7,072 cubic inches (size of a large action packer)

Non-plastic rope or smaller pieces of net, when compressed is smaller than 6 cubic inches

Non-plastic rope or smaller pieces of net, when compressed is larger than 6 cubic inches and smaller than 7,072 cubic inches (size of a large action packer)

Non-plastic rope or smaller pieces of net, when compressed is larger than 7,072 cubic inches (size of a large action packer)

Identifiable, eel traps, independent of size

Identifiable, oyster spacers, 10 cm or larger

Identifiable, plastic pipes, independent of size

Identifiable, plastic basket, independent of size

Identifiable, other debris, independent of size

Start date and time of survey

End date and time of survey

3-letter island code. MID: Midway Atoll

Island or sub-island name

General location of survey area within the island or sub-island specified in the SPECIFIC_LOCATION column

Beginning latitude of survey area from GPS unit (unit = decimal degree in WGS 1984 Geographic Coordinate System). Null if survey areas of Sand Island in Midway Atoll are not tracked.

Beginning longitude of survey area from GPS unit (unit = decimal degree in WGS 1984 Geographic Coordinate System). Null if survey areas of Sand Island in Midway Atoll are not tracked.

End latitude of survey area from GPS unit (unit = decimal degree in WGS 1984 Geographic Coordinate System). Null if survey areas of Sand Island in Midway Atoll are not tracked.

End longitude of survey area from GPS unit (unit = decimal degree in WGS 1984 Geographic Coordinate System). Null if survey areas of Sand Island in Midway Atoll are not tracked.

Average width of shoreline, from vegetation to high tide line (unit = meters). In 2013, the shoreline width was inconsistently collected (null if the data was not collected).

Date of last survey, if known. Inconsistently documented.

Indication of whether a major storm has occurred since the last survey. Inconsistently documented (1/storm occurred; 0/no known storm).

Date of most recent storm, if known. Inconsistently documented.

Description of the major storm if STORM_ACTIVITY column is 1 (dates, names of storms, etc.). Inconsistently documented.

Brief weather observations. Inconsistently documented.

Total number of participants for the survey.

Notable observations related to the survey.

Total weight of debris removed, may not be total of all tallied items (unit = kilograms).

Radiation level of survey area, only measured for selected segment in 2013 (unit = rem).

Segment ID of 300-meter segment along the shorelines of Eastern (EAS) and Spit (SPT) Islands on Midway Atoll. Survey areas of Sand Island (SAN) are often not tracked, and no ID is assigned.

Area surveyed, derived by digitizing GPS tracks of survey area in ArcGIS 10.x (unit = square kilometers, WGS 1984 UTM Zone 1N). Null if survey areas of Sand Island in Midway Atoll are not tracked.