This ontology supports querying the SAWGraph Knowledge Graph. It adapts and extends concepts from HY_Features, HyFO, and GWML2
SAWGraph's hydrology (water) ontology - an adaptation and extension of concepts from HY_Features, HyFO, and GWML2
The default Geometry to be used in spatial calculations. It is usually the most detailed Geometry.
A spatial representation for a given Feature.
Relates an aquifer system part, which can be another system, aquifer or confining bed, with its aquifer system
Relates an aquifer system with its parts, which can be other systems, aquifers or confining beds
Identifies the feature hosting the site [GW_MonitoringSite], e.g., a well, spring, lake or stream
Identifies the aquifers or confining beds intersecting the well
Identifies another waterbody immediately downstream, allowing network navigation without knowing an inflow or outflow of the catchment realized by the waterbody
Identifies the one and only one catchment that is realized by a particular feature
Identifies another waterbody immediately upstream, allowing network navigation without knowing an inflow or outflow of the catchment realized by the waterbody
Connects a flowline catchment with its flowline(s)
The transitive closure of the nhdplusv2:downstreamWaterBody object property
Identifies another flowpath immediately downstream, allowing network navigation without knowing an inflow or outflow of the catchment realized by the flowpath
The transitive closure of the nhdplusv2:downstreamFlowPath object property
Identifies another flowpath immediately upstream, allowing network navigation without knowing an inflow or outflow of the catchment realized by the flowpath
Connects an elementary flowpath (e.g., NHDFlowline) to any non-elementary flowpath it is a part of
Connects an elementary flowpath (e.g., NHDFlowline) to its main stem
Connects an elementary flowpath to a waterbody it lies within
Identifies the one and only one catchment area that is associated with a particular flowpath
Relates a water feature to a representation of that water feature
Relates any flowpath to its length, represented as, for example, a qudt:Quantity object
Relates a drainage basin (area) to the primary mainstem flowing through it
Relates a flowline catchment to any WBD drainage basin it lies within
Relates a mainstem to the drainage basin (area) it drains
topological connection (spatial contact) (sawgraph)
Relates an NHDPlusV2 feature to its COMID
Indicates if a nhdplusv2:FlowLine is the main-path or a minor-path of a divergence (no triple if no divergence)
Relates an NHDPlusV2 feature to its FCODE (see also nhdplusv2:hasFTYPE)
Relates an NHDPlusV2 feature to its FTYPE (see also nhdplusv2:hasFCODE)
The level path id of a flowline is the hydrologic sequence number of the most downstream flowline feature in the level path and is used to connect flowlines to their corresponding main stem
Relates a nhdplusv2:MainStem feature to its unique identifier
Relates an NHDPlusV2 feature to its ReachCode
A discrete spatial phenomenon in a universe of discourse.
A coherent set of direct positions in space. The positions are held within a Spatial Reference System (SRS).
Anything spatial (being or having a shape, position or an extent).
A body of earth material that contains / potentially contains / potentially contained sufficient saturated permeable material to yield significant quantities of water to wells and springs (after Lohman, 1972)
A body of permeable and poorly permeable material that functions regionally as a water-yielding unit; it comprises two or more permeable beds separated at least locally by confining beds that impede groundwater movement but do not greatly affect the regional hydraulic continuity of the system; includes both saturated and unsaturated parts of permeable material (after ASCE, 1987)
Denotes aquifer-related hydrogeological units: aquifer systems, aquifers, or confining beds
Any soil or rock unit or zone that by virtue of its hydraulic properties has a distinct influence on the storage or movement of groundwater (after ANS, 1980)
Site of observation related to groundwater
A shaft or hole sunk, dug or drilled into the Earth to observe, extract or inject water (after IGH1397)
a body of surface water, participating in a hydrographic network, that is special due to its artificial origin (man-made)
captures the union of catchment and hydro nexus, and the multiple realizations of the holistic catchment concept
Two-dimensional (areal) hydrology-specific realization of the holistic catchment
One-dimensional (linear) feature that is a hydrology-specific realization of the holistic catchment
based on the idea that there are multiple hydrology-specific perspectives of the holistic catchment concept that are used to describe a catchment as a unit of study shared across sub-domains and studies
a catchment which is determined by a single common downstream catchment
a body of surface water, participating in a hydrographic network, made special due to branching and its interaction with the open sea
realizes a catchment specifically as a path connecting the inflow and outflow of the catchment it realizes
a basic feature to reflect the properties that all hydrologic features have
a body of surface water, participating in a hydrographic network, seen as being special due to being formed by collecting water, for example in the case of a dam
a body of surface water, participating in a hydrographic network, which is special due to its shallow depth and interaction with the open sea
a body of surface water, participating in a hydrographic network, made special due to its considerable size
a body of surface water, participating in a hydrographic network, which is special due to its property to permanently or temporarily flow
A waterbody is part of the hydrographic network and is either standing in a depression or flowing in a channel, which are parts of the channel network
any atomic/elementary kind of HY_FlowPath within a given framework/context (for example, a single NHDFlowline instance)
area of associated catchment may be zero (per hydrologic fabric logic model)
The catchment polygon for a nhdplusv2:FlowLine
any non-atomic/non-elementary kind of HY_FlowPath comprised of a contiguous set of atomic/elementary flowpaths
a named river or similar feature, represented from head to outlet (a composition of elemenatry flowpaths (flowlines) per hydrologic fabric logic model)
A HUC12 watershed (drainage area) from the WBD
An aquifer water feature including water, container, and void
a hybrid physical object, such as aquifer, well, or lake, that consists partly of a rock body (a container), empty spaces therein (voids), and a water body inside the space
A complete subsurface water feature including water, container, and void (for example, aquifer, well, et al.)
A complete surface water feature including water, container, and void (for example: lake, river, marsh, et al.)
A complete water feature including water, container, and void; includes surface and subsurface water features
A representation of a water feature (for example, a line or polygon)
A water well, with focus on the hole/shaft itself (see gwml2:GW_Well)