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sukark

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  1. Hello Chris, I checked the version of SMS and unfortunately it is 10.1.3. In TUFLOW site, there is TUFLOW_to_GIS.exe package which says that it converts .2dm, .dat files into mapinfo .mif/.mid files. I couldn't follow the instruction properly as i am just beginner into this stuff, If you have used that package, could u please guide me? Or is there some other alternatives to export the results to Arc GIS. regards sudhir
  2. Chris, I gave several try but couldn't succeed to get the proper results. Could u please give some examples or illustration, which would be very helpful for me. Thanks sudhir
  3. Hello friends, I want to export my SMS-TUFLOW results into Arc GIS for further analysis. Can anybody give suggestions/hints about how to do that?? Your suggestions will be much appreciated
  4. Hello Rusty!! Thanks for your answer. I think in my case reliability of data should not the problem because I had really high quality (1m*1m) bathymetric data collected by side scanning sonar for river bathymetry. I converted it into the corresponding resolution (2m, 10m & 25m) of DEMs i have and combined this data with respective DEMs to get river geometry. Also regarding the boundary condition, the upstream discharge was obtained from finnish environment institute which has its observation station few kilometers up from my study area where there is a dam for hydropower plant. And the water level data at 2 calibration point is also from real time Water level observation station at those locations from finnish environment institute. I have discharge and observed water level information (at downstream BC, calibration point 1 and calibration point 2 -please refer to the graphics) on hourly basis for 2010 starting from january 1st to August 9. I think the crucial thing for me is not the data but some guidance about how to process and use these data effeciently. So can you please give some idea on following things: 1. What are the most important things one should look at before using any hydrological data for using it as boundary conditions? May be i haven't been able to look at the data critically. 2. Regarding my downstream BC, I have created BC arc at two locations as the river is branched. But i have water level data for one side only. I have been assuming the same water level at other side also. Can it be done or I have done mistake here?? And also, should the boundary arc should be drawn exactly at the same point of water level measurement or some up or down doesn't matter. 3. Out of the hydgolocial data, what is the best way to separate it into boundary condition data for building model and validation data? 4. The way i have created my river geometry is i have converted my DEMs and Sonar data into different resolutions and converted those into ESRI shapefile. In SMS i did mapping->shapes to feature objects and then feature objects->map to scatter. Then right click on default coverage and choose type->models->tuflow->grid extents. This is how i have creatd TUFLOW grid. Is this the correct way? or there is other smarter and efficient way to do this. I have attached the related files and graphics in your mail as it said error here (rjones@aquaveo.com. Plz find the attachment I would be really happy and grateful to have your critical comments on these confusion as you are the only guide/teacher for me at the moment. I will appreciate your help from the bottom of my heart. Thanks Sudhir
  5. Hello Rusty!! Many thanks for your answers which which provided me good insight about my queries. Today I spent my whole day trying to calibrate my model for 10m DEM. I have created observation coverage as suggested by you for one location and looked how well the calibrated WL fits with observed WL. I changed Mannings n value and calibrated it several times. I got acceptable results at some points for 5 time steps out of 7. The calibrated WL for 2 time steps is not within acceptable range despite of many try. I couldn't think of any reason why these two timesteps are not matching. Can u give me some suggestions to overcome this. I have divided my material data into four class: agricultural land, urban area, forest and channel. and most of the area is urban. Can u give me some hints and tips about using mannings n value more effectively? ome other information/suggestions useful at the stage. I look forward to your response. Sudhir
  6. Hello Rusty!! Thanks a lot for your suggestions. It has really helped me to move forward and find answers to my confusions and queries. I have some questions for you that i have problems and confusion with: 1. Actually I am trying to evaluate the performance of different resolution DEMs for flood modelling. So I have high resolution DEM (2*2m LiDAR), 10*10m and 25*25m contour interpolated DEMs. With 10*10m DEM the simulation ran without problem and didn't take significantly long time even when i put one month daily averaged discharge and water level data for my BC. But with 2'2m LiDAR DEM, the software didn't respond nicely. While converting my elevation into elevation grid, it didn't respond. I converted it into 5*5m DEM in Arc GIS and ran the simulation for shorter timestep (6-7 hours of a day) but even then it is taking longer time, more than 1.5 hour to build the model. what could be the reason for that?? also the solution to overcome it. 2.Is it enough if i run the simulation just for 6-7 hours period of time of a day and calibrate it. Or more longer time period data need to be used for boundary condition? Does the longer time/shorter time have any effect on the simulation results?? 3. In which kind of situation, is it possible or logical to use steady-state condition for building model?? (just my quiriosity) I look forward to your answers Thanks Sudhir
  7. Hello Rusty!! Is it worth to run the simulation for a day assuming it as a steady state flow and follow the tutorial for model calibration. But as the flow behaviour in reality is not steady. what do you suggest??
  8. How can i create transient measurement? I have one water level data measured in the river from another location between upstream and downstream boundary. how can i use that data to create transient measurement?
  9. Hello Rusty!! Thanks a lot for your suggestions and information. I went through the Observation coverage tutorial u have mentioned and found it to be informative and useful. You have mentioned "unfortunately, it is geared towards steady state models".But could you please elaborate in detail what's the difficulty for following this tutorial as my guide for my model calibration? I look forward to your response Thanks Sudhir
  10. Hello everyone!! I am trying to learn and know how to calibrate and validate a 2D TUFLOW model, after the simulation is run. I have daily averaged discharge and water level data for 4 months which i used to run the simulation. Now my aim is to calibrate and validate this model. But how to do this??I am new to this world and don know much and have idea about doing this properly. So i need your suggestions, informations and support. Thanks
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