#viral #arcgis #topography #map
Topographic Wetness Index (TWI) is used to quantify topographic controls on hydrological processes. It is useful to measure or estimate where water will accumulate in an area with elevation differences. This video shows you how create Topographic Wetness Index (TWI) in ArcGIS. Enjoy your watching and subscribe.


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00:00 Introduction
00:25 Data requirement and steps
00:55 Fill DEM
02:19 Flow direction
02:57 Flow accumulation
03:31 Calculate slope
04:20 Radian of slope
05:50 Tan slope
04:20 Radian of slope
07:35 Flow accumulation scaled
09:19 Topographic Wetness Index
11:25 Classify Topographic Wetness Index
12:04 Conclusion


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