Does someone repair the drainage ditch in front of the door affect Feng Shui?

It still has some influence. After all, it's not a good situation for you to go out and ditch. What does your neighbor think, to repair the ditch in front of someone else's house?

In addition, this ditch will be better if it flows from east to west, and even worse if it flows from west to east.

The south flows to Xuanwu in the north, and the north flows to fire and water in the south. Obviously, the former is slightly better than the latter.

Of course, it is best if you have the money to persuade your neighbors not to repair this. Think about it, isn't it a sign that you are tired of other people's bad things that other people's sewage flows through your door?