Error channal

[­조무빈 / 학생 / 환경설계학과]

Hello,
 I’m using SWAT to analyze Water Yield (WY) ecosystem services.

However, when I perform watershed delineation in SWAT, channels which is not actually exist are being mapped over roads.

 I’ve tried using different DEMs, but the same issue persists. Also, when I raised the channel threshold to suppress those channels, the stream threshold naturally increased as well, which caused the previously delineated watersheds to be underestimated.

Do you know any methods I could apply to fix this?