Dear community,I gave a try to r.hazard.flood and got som erroneous results, that indicate flood hazard (value 1) on the hillsides. Is that possible? I am running r.flood.hazard in GRASS GIS 7.2.0 on a windows 10 machine. The DTM used has 1m resolution. Not error messages are produced-- (below the command output), but the results do not represent the reality. The MTI map on the other hand, looks correct to me. Negative values on the hillside and positive values in the floodplain (see attachments). (Fri Feb 24 07:54:22 2017) r.hazard.flood --overwrite map=driva_sk_1m@PERMANENT flood=floodHazard mti=MTIFlood Cellsize : 1.0 SECTION 1a (of 4): Initiating Memory. SECTION 1b (of 4): Determining Offmap Flow. SECTION 2: A* Search. SECTION 3a: Accumulating Surface Flow with MFD. SECTION 3b: Adjusting drainage directions. SECTION 4: Closing Maps. Writing out only positive flow accumulation values. Cells with a likely underestimate for flow accumulation can no longer be identified. Flow accumulation done. Slope raster map <r_slope> complete Slope map done. Exponent : 0.016 MTI threshold : 2.45624 Calculating MTI raster map.. Cleaning up.. Calculating flood raster map.. Running r.clump.. Pass 1 of 2... Generating renumbering scheme... Pass 2 of 2... r.clump complete. 19533 clumps. Deleting areas of less than 1000000 cells.. Reading... Writing... Done! Cleaning up.. Removing raster <r_clump> Removing raster <r_flood_th> Removing raster <r_flood> Done. (Fri Feb 24 07:54:53 2017) Command finished (31 sec) Some other statistics... r.univar map=MTIFlood@PERMANENT total null and non-null cells: 9016440 total null cells: 77829 Of the non-null cells: ---------------------- n: 8938611 minimum: -3.67184 maximum: 11.1875 range: 14.8593 mean: 1.74111 mean of absolute values: 1.95274 standard deviation: 2.18821 variance: 4.78828 variation coefficient: 125.679 % sum: 15563100.8518932 (Fri Feb 24 08:05:33 2017) Command finished (1 sec) I would appreciate any hint.Have a nice Weekend Rengifo
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