Somewhat. There are ramps to the picnic tables and playgrounds. I think there are ramps up to the "stage" area too. I think the bathrooms have accessible stalls. If you wanted to see the river up close you'd have to go down to the Tauhundali "park" which has accessible paths. The paths through the botanical gardens are not accessible friendly. Having a power chair or a manual chair with "offroad" wheels would be best as a lot of the area is dirt or low grass.
It seems like it would be, pretty small some parts have small stair areas though.
Thanks! Your answer is awaiting moderation.