Is it permissible to make a sukkah with walls made of flowing water (assuming that schach can be suspended over these 'walls')?
Furthermore, would the water need to be 'continuous' or 'wall-like' (see image), or can it be a more broken flow as long as it covered the wall area by a certain amount (analagous to levud)?
Why would someone want to do this... may reasons. It can remind us of the well of Miriam that followed us in the desert. Water is analogous to Torah i.e. surrounded by Torah. On sukkot we performed water libations. And perhaps the most direct: we read about the splitting of the sea at the end of sukkot, with specific reference to the walls of water that the Jews walked through (Shemot 14:29): "וּבְנֵי יִשְׂרָאֵל הָלְכוּ בַיַּבָּשָׁה, בְּתוֹךְ הַיָּם; וְהַמַּיִם לָהֶם חֹמָה, מִימִינָם וּמִשְּׂמֹאלָם. "