topic How to plan a simple hydrological inundation model in 3D Questions https://community.esri.com/t5/3d-questions/how-to-plan-a-simple-hydrological-inundation-model/m-p/412769#M2457 <HTML><HEAD></HEAD><BODY><P>I have the opportunity to use lidar data to&nbsp;produce an inundation model for an area of wetland. I have looked at various scenarios but none really fit my purpose thus I am asking here.</P><P></P><P>The scenario is, that my area of wetland is permanently water logged at a certain height above sea level e.g 80 meters. Surrounding the wetland area are a number of man-made drainage channels which have been dug out by neighbouring farmers. My Job is to create inundation models to estimate the&nbsp;extent of inundation if one or all of these drainage channels were filled in.</P><P></P><P>I will not be taking into account soil drainage or precipitation or evaporation etc. I have lidar data with 0.5m resolution.</P><P></P><P>My initial thoughts were to :</P><P></P><P>1. use the ArcGIS "FILL" tool to fill in the imperfections of the DEM (this seems to be the standard first step)</P><P>2. Calculate the volume of water in the basin including the drainage channels at a certain height.</P><P>3. Close&nbsp;the drainage channels and recreate the dem.</P><P>4. Refill the basin by the amount calculated in the last step and see where the water goes. ( not sure which tools or process could do this accurately)</P><P></P><P>In effect, what I am doing is creating a dam...the only difference is, that I&nbsp;have a constant volume of water in the basin before the dam in built.</P><P></P><P>If my line of thinking is totally wrong, I would be grateful for some input, or tips on how to achieve a reasonable result.</P></BODY></HTML> Thu, 26 Jan 2017 22:16:35 GMT RobertBuckley1 2017-01-26T22:16:35Z How to plan a simple hydrological inundation model https://community.esri.com/t5/3d-questions/how-to-plan-a-simple-hydrological-inundation-model/m-p/412769#M2457 <HTML><HEAD></HEAD><BODY><P>I have the opportunity to use lidar data to&nbsp;produce an inundation model for an area of wetland. I have looked at various scenarios but none really fit my purpose thus I am asking here.</P><P></P><P>The scenario is, that my area of wetland is permanently water logged at a certain height above sea level e.g 80 meters. Surrounding the wetland area are a number of man-made drainage channels which have been dug out by neighbouring farmers. My Job is to create inundation models to estimate the&nbsp;extent of inundation if one or all of these drainage channels were filled in.</P><P></P><P>I will not be taking into account soil drainage or precipitation or evaporation etc. I have lidar data with 0.5m resolution.</P><P></P><P>My initial thoughts were to :</P><P></P><P>1. use the ArcGIS "FILL" tool to fill in the imperfections of the DEM (this seems to be the standard first step)</P><P>2. Calculate the volume of water in the basin including the drainage channels at a certain height.</P><P>3. Close&nbsp;the drainage channels and recreate the dem.</P><P>4. Refill the basin by the amount calculated in the last step and see where the water goes. ( not sure which tools or process could do this accurately)</P><P></P><P>In effect, what I am doing is creating a dam...the only difference is, that I&nbsp;have a constant volume of water in the basin before the dam in built.</P><P></P><P>If my line of thinking is totally wrong, I would be grateful for some input, or tips on how to achieve a reasonable result.</P></BODY></HTML> Thu, 26 Jan 2017 22:16:35 GMT https://community.esri.com/t5/3d-questions/how-to-plan-a-simple-hydrological-inundation-model/m-p/412769#M2457 RobertBuckley1 2017-01-26T22:16:35Z