In gis sometimes data can be represented a points, lines and polygons, what type of data model is this? what is another type of data model?

Two types of gis data representation method are raster and vector

Explanation:

In a GIS the data that is represented by the pints, line, and polygons is raster data and it's stored in the real world like phenomenon also known as the discrete data. Raster data is made up of pixel values and attributes that are associated with its color values, data is represented by the grids of cells. Stores spatial data more  Another type of data model being the vector model that focuses on lines,  polygons and area points are expressed by the single point reference. For example, cities on a map. A line like the rivers the roads the railroads, trails, and topographic and polygons include the lakes, park boundaries, buildings, etc. Vector data is most compatible with the relational database environments. Vector file sizes are hence usually very smaller than raster data. Raster data is computationally less expensive as compared to vector graphics. Stores nonspatial data.

Answerhave flowing water either episodically or during only a portion of the year;