Hello. You are rather busy with mapping, I see,
A remark on this task.
You mapped a rather big area as farmland, despite most of the area is wetland without proof of farmland,
cultivated land with ditches etc. 
The instructions ask to focus on waterways like canals. No big water bodies
See this webpage with my adjustments
https://overpass-api.de/achavi/?changeset=168697178
Best regards


