Deriving Hydrological Response Units (HRUs) using a Web Processing Service implementation based on GRASS GIS

Christian Schwartze
2009 Geoinformatics FCE CTU  
QGIS releases equal to or newer than 0.7 can easily connected to GRASS GIS by means of a toolbox that provides a wide range of standard GRASS modules you can launch -albeit only on data coming from GRASS. This QGIS plugin is expandable through XML configurations describing the assignment of options and inputs for a certain module. But how about embedding a precise workflow where the several processes don't consist of a single GRASS module by force? Especially for a sequence of dependent tasks
more » ... makes sense to merge relevant GRASS functionality into an own and encapsulated QGIS extension. Its architecture and development is tested and combined with the Web Processing Service (WPS) for remote execution using the concept of hydrological response units (HRUs) as an example. The results of this assay may be suitable for discussing and planning other wizard-like geoprocessing plugins in QGIS that also should make use of an additional GRASS server. Brief background Hydrological Response Units may be considered as spatial entities with the objective of applying them to the process of water modelling. The designation of such regions as assumed for the present work operates on physiographical characteristics of the catchment area [2] and aims at its partitioning into zones similar to each other -both topography and dynamic related. For further information such as various additions you may refer to e.g. [1] and [5] . Details and sub-steps of the derivation used by the planned tool are discussed in section 4. Geinformatics FCE CTU 2008
doi:10.14311/gi.3.6 fatcat:atsojk7lf5fkjmall2nhbz4564