ORIGINAL: timbercruiser
Call your county forester or NRCS office. There should be some safe sprays that you can use by your pond that won't affect the new plants you want to put in after the olives are dead.
x2. I worked on a farm this past summer and sprayed a lot brush that were right beside a river, with some herbicides. Unfortunately I cannot recall the name of what I used which ultimately makes this post..useless.