Student or Learner
"welcome to the participants regional workshop on river basin organization and management"
i believe that the committee here wants to welcome the participants. however the way they write this sentences is a bit strange in my opinion.
so..please everyone check this sentences
Welcome to the participant 's regional workshop on river basin organization and management.
You said 'I believe' without giving more information. As you can see just by using an apostrophe the meaning is completely different. You will have to judge which is right in your circumstances.
If the participants are being welcomed to watch?
If the welcome is to the participants' regional workshop?
If the participants are being welcomed to a participants' regional workshop.
Then is the committee welcoming a few participants to the participants' regional workshop?
The original question does not really give the fullest information.