Extraction of Hydrologic Information

Digital Elevation Model (DEM) is used to determine terrain attributes and geomorphologic attributes. The geographic information system and the Arc Hydro tool are used to extract various hydrologic information and to describe various characteristics of the catchment area. The procedure includes the: DEM reconditioning and stream network generation. The Elevation-Area-Volume (EAV) of a reservoir plays an important role in planning and operation purposes. The EAV curve is used for reservoir operation, reservoir flood routing, etc. and it has a great significance from a practical aspect. Extracted hydrologic information is essential for hydrologic analysis and to provide support for water resource management.. The actual method in determining EAV curve is costly, time-consuming and laborious. The different generated catchment basin will support in analyzing spatial data to select the suitable site for the construction of reservoirs.