topic How to calculate the discharge of a targeted river in Water Resources Questions https://community.esri.com/t5/water-resources-questions/how-to-calculate-the-discharge-of-a-targeted-river/m-p/679304#M3500 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I am doing a small project related to the hydrology in New Mexico. My goal is to get the discharge of a targeted river. All I have is the DEM of the area of interest. Please let me know if I could use the Hydrology tools in Spatial Analyst to solve this problem. Please also let me know If I need more data or other tools.</SPAN><BR /><BR /><SPAN>Many thanks,</SPAN><BR /><SPAN>Hank</SPAN></BODY></HTML> Wed, 06 Nov 2013 16:41:33 GMT Chang-HengYang 2013-11-06T16:41:33Z How to calculate the discharge of a targeted river https://community.esri.com/t5/water-resources-questions/how-to-calculate-the-discharge-of-a-targeted-river/m-p/679304#M3500 <HTML><HEAD></HEAD><BODY><SPAN>Hi all,</SPAN><BR /><BR /><SPAN>I am doing a small project related to the hydrology in New Mexico. My goal is to get the discharge of a targeted river. All I have is the DEM of the area of interest. Please let me know if I could use the Hydrology tools in Spatial Analyst to solve this problem. Please also let me know If I need more data or other tools.</SPAN><BR /><BR /><SPAN>Many thanks,</SPAN><BR /><SPAN>Hank</SPAN></BODY></HTML> Wed, 06 Nov 2013 16:41:33 GMT https://community.esri.com/t5/water-resources-questions/how-to-calculate-the-discharge-of-a-targeted-river/m-p/679304#M3500 Chang-HengYang 2013-11-06T16:41:33Z Re: How to calculate the discharge of a targeted river https://community.esri.com/t5/water-resources-questions/how-to-calculate-the-discharge-of-a-targeted-river/m-p/679305#M3501 <HTML><HEAD></HEAD><BODY><SPAN>Depends entirely on what you want as an output. If you just want a peak flow rough estimate, you can use the rational method. Then you only need your drainage area (watershed area calculated in GIS), the runoff coefficient, and rainfall intensity. If you want anything much more complex, you will need to use a hydrologic modeling software (HEC-HMS is a common free one). GIS can help you get much of the input needed for these models including basins, streams, curve numbers, and time of concentration, but the modeling software will require other inputs such as your storm hydrographs and any gauge locations for calibration.</SPAN></BODY></HTML> Thu, 14 Nov 2013 23:11:43 GMT https://community.esri.com/t5/water-resources-questions/how-to-calculate-the-discharge-of-a-targeted-river/m-p/679305#M3501 BondHarper 2013-11-14T23:11:43Z