The current version of HEC-RAS can perform either steady or unsteady flow computations. The other data types are only required if you are going to do that specific type of analysis (i.e., steady flow data are required to perform a steady flow water surface profile computation). Geometric data are required for any of the analyses performed within HEC-RAS. Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. The data needed to perform these computations are divided into the following categories: geometric data steady flow data unsteady flow data sediment data and water quality data. SQL is a standard language for storing, manipulating and retrieving data in databases. The main objective of the HEC-RAS program is quite simple - to compute water surface elevations at all locations of interest for either a given set of flow data (steady flow simulation), or by routing hydrographs through the system (unsteady flow simulation). Up to 2009 we used the yearly survey issued in. These simple tools make it easy to work with data in fun ways, so you can learn how to find great stories to tell. Someone in social sciences might use Excel, ATLAS.ti and SPSS. A marketer’s stack might involve Excel, Polymer Search and Akkio. For instance, a data scientist’s stack often includes Excel/Google Sheets, R/Python and Tableau. For information of data requirements for 2D modeling, please review the 2D Modeling User's manual. Data source: Usually the manufacturer and the year of the latest update. DataBasic is a suite of easy-to-use web tools for beginners that introduce concepts of working with data. Most times, it’s best to use a combination of tools for the job. Some common examples of data types are: Strings (ex: Hello, this is a string.) Integers (ex: 400) Decimals (ex: 400. Data types are certain categories that data can fall into when it is stored in a spreadsheet, software, or database. The basic data are defined and discussions of applicable ranges for parameters are provided. Another commonly used data skill is data type conversion. This chapter describes the basic data requirements for performing the one-dimensional flow calculations within HEC-RAS.
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