HY_SubsurfaceHydroFeature OGC HY_Features: a Common Hydrologic Feature Model
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Copyright © 2014 OGC
Figure 23 HY_SubsurfaceHydroFeature – Package dependencies
SubsurfaceWater informative package summarizes the most popular types of liquid water occupying empty space in soil and aquifers. Depending on the implementation, the
special types of subsurface water in the saturated and unsaturated zone may be described by suitable attributes. As hydrogeology is a science on its own, the special relationships
between groundwater and a water body are not in the scope of HY_Features model. To take into account the effects of groundwater interaction on a gaininglosing water body -
segment, Groundwater may be associated with the relevant water body at the application level.
SubsurfaceWaterConfines Figure 24 includes the basic elements containing subsurface water such as a HydrogeologicUnit and Aquifer. Both are introduced here to provide a
simple means for taking into account the hydrologically significant characteristics of geologic formations of soil or rock yielding water, particularly groundwater. Well is
introduced to consider the well extracting water from aquifer as ReferencePoint that may be used to locate the Outfall of a basin.
Copyright © 2014 OGC
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class hl _su surfaceHydro eature
HY ater
q d
hase «FeatureType»
HY_Su surf ater::
HY_ r ater
HY ater
q d
hase «FeatureType»
HY_Su surf ater::
HY ado
ater
«FeatureType»
HY_Su surf aterConfines::
HY_Aquifer
HY_Catchment
R
epresentation «FeatureType»
HY_SubsurfaceWaterConfines:: HY_HydroGeologicUnit
«FeatureType»
HY_SubsurfaceWaterConfines:: HY_Well
+ ingAquifer
+groundwater eservoir +containi
nit +extracti
ell
Figure 24 UML class diagram: SubsurfaceWaterConfines
The SubsurfaceHydroFeature model allows to separately address types of subsurface water as well as the containing aquifer without details of accumulation and movement of
water. It is intended that applications dealing with groundwater and soil moisture may use this to reference the represented hydrologic feature.