lake_characteristics: LAGOSUS Lake characteristics

In cont-limno/LAGOSUS: Interface to the Lake Multi-Scaled Geospatial and Temporal Database

LAGOSUS Lake characteristics

Description

Includes derived metrics for each lake such as lake geometry (e.g., area, perimeter, shape metrics), lake connectivity (e.g., lake connectivity class, number of upstream lakes), and whether the lake is located within an area that was glaciated during the Late Wisconsin glaciation.

Details

Variable name	Variable name group	Lagosne variable name	Variable description	Units
lagoslakeid	lagoslakeid	lagoslakeid	unique lake identifier developed by LAGOS-US
lake_waterarea_ha	waterarea_ha	lake_area_ha	surface area of lake waterbody polygon from NHD comprised of open water; islands are excluded	hectare
lake_totalarea_ha	totalarea_ha		total area of the lake waterbody polygon from the NHD; includes combined area of open water and any islands within the outer boundary	hectare
lake_islandarea_ha	islandarea_ha		surface area of any islands contained within the outer boundary of the lake waterbody polygon from NHD	hectare
lake_perimeter_m	perimeter_m	lake_perim_meters	perimeter of outer boundary of lake waterbody polygon from the NHD; excludes perimeter of any islands	meter
lake_islandperimeter_m	islandperimeter_m		perimeter of islands contained within the outer boundary of the lake waterbody polygon from the NHD	meter
lake_shorelinedevfactor	shorelinedevfactor		shoreline development factor; calculated as lake_perimeter_m divided by the product of 2 times the square root of pi times lake_waterarea_ha
lake_mbgconhull_length_m	mbgconhull_length_m		the maximum possible distance between any two vertices of the minimum bounding geometry convex hull that encloses the lake polygon	meter
lake_mbgconhull_width_m	mbgconhull_width_m		the maximum width of the lake convex hull polygon along an axis perpendicular to the axis defined by the convex hull length	meter
lake_mbgconhull_orientation_deg	mbgconhull_orientation_m		orientation of the line defining the convex hull length; calculated as decimal degrees clockwise from north	degree
lake_mbgrect_length_m	mbgrect_length_m		length of the minimum bounding geometry rectangle by area enclosing the lake polygon	meter
lake_mbgrect_width_m	mbgrect_width_m		width of the minimum bounding geometry rectangle by area enclosing the lake polygon	meter
lake_mbgrect_arearatio	mbgrect_arearatio		ratio between lake_waterarea_ha converted to meters squared and the product of lake_mbgrect_length_m and lake_mbgrect_width_m; values near 1 indicate rectangular lake shape
lake_meanwidth_m	meanwidth_m		mean width of the lake; calculated as lake_waterarea_ha converted to meters squared divided by lake_mbgconhull_length_m	meter
lake_connectivity_class	connectivity	lakeconnection	maximum hydrologic connectivity class of the focal lake determined from the NHD network considering both permanent and intermittent-ephemeral flow
lake_connectivity_fluctuates	connectivity		indicates whether the lake connectivity classification depends on non-permanent flow
lake_connectivity_permanent	connectivity		hydrologic connectivity class of the focal lake determined from the NHD network considering only permanent flow
lake_lakes1ha_upstream_ha	lakes1ha_upstream_ha		total area of lakes greater than or equal to 1 ha upstream of the focal lake, connected via surface streams	hectare
lake_lakes4ha_upstream_ha	lakes4ha_upstream_ha	upstream_lakes_4ha_area_ha	total area of lakes greater than or equal to 4 ha upstream of the focal lake, connected via surface streams	hectare
lake_lakes10ha_upstream_ha	lakes10ha_upstream_ha	upstream_lakes_10ha_area_ha	total area of lakes greater than or equal to 10 ha upstream of the focal lake, connected via surface streams	hectare
lake_lakes1ha_upstream_n	lakes1ha_upstream_n		count of lakes greater than or equal to 1 ha upstream of the focal lake, connected via surface streams	count
lake_lakes4ha_upstream_n	lakes4ha_upstream_n	upstream_lakes_4ha_count	count of lakes greater than or equal to 4 ha upstream of the focal lake, connected via surface streams	count
lake_lakes10ha_upstream_n	lakes10ha_upstream_n	upstream_lakes_10ha_count	count of lakes greater than or equal to 10 ha upstream of the focal lake, connected via surface streams	count
lake_glaciatedlatewisc	glaciatedlatewisc	latewisconsinglaciation_glacial	glaciation status during the Late Wisconsin glaciation; Glaciated status is assigned if any part of the lake polygon is inside the glacial extent

cont-limno/LAGOSUS documentation built on Aug. 24, 2023, 10:01 a.m.