With the aid of remote sensing and GIS, it is easier to predict changes in ungauged basins, perform modeling base on the data, etc.
Line In GIS it is sometimes called an arc, a link or a segment.
Based on GIS analysis it was found that 17%percentt of the Potshini catchment area has a high potential for generating surface runoff, whereas an analysis of all factors which influence the location of such systems, shows that 18% is highly suitable for runoff harvesting.
Moreover, by representing event GPS location points (as Shapefiles) in the GIS project, it was possible to record some relevant information that could be directly integrated in the database.
Moreover, once data are available in GIS, it can be extracted, combined with other data, reformatted as necessary for various modeling processes and even used to generate other inputs needed by the models (Robbins and Phipps 1996).
Important contents of the plug-in menu: GIS tool: It is the function that includes the processes that are needed to build a GIS such as: assigning projection to grid or image or raster, Georeferencing an image or grid, generating a contour shape file and other processes (See Figure 9).
The results of the scenarios were analysed using HEC-RAS and GIS, from which it was deduced that the factors (i.e. topology, land use, soil type and hydraulic parameters) are influencing parameters.
Some developers have utilized the graphic user interface (GUI) tool kit of the GIS to develop turnkey applications that launch the model from within the GIS so that it is hidden from the user who simply communicates through a menu.
Almost all methods used in conservation planning assume that data are recorded in a Geographical Information System (GIS) model.[23] It is at least arguable that the emergence of conservation biology as a science required the development of GIS technology and high-speed computation.[24] At this stage, the biological entities that are of most conservation interest must be identified.
