Using ArcHydro Tool For delineation

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12-12-2019 12:47 PM
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Fatemehsohrabi
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Hi Everybody,

I am using ArcHydro tool for delineate my Basin Area, I don't understand the concepts behind some steps:

Here is the steps:

1- First I have to Use raster calculator and I use this equation: (DEM+0.5)*10 

2-Int (the result from first step)

3- Set Target Location 

4- Sink Processing

5- Sink Evaluation

6- Sink Selection

7- Fill Sinks

is there anybody who can clarify those above steps for me?

why we need to have a integer DEM?

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