It's much easier to collect trash in dump sites in flood-prone areas for example than from a river. Concentrated trash in a smaller body of water won't be much

It's much easier to collect trash in dump sites in flood-prone areas for example than from a river. Concentrated trash in a smaller body of water won't be much easier to collect than the status quo given how much concentrated trash there already major Asian rivers, especially when you consider how much maintenance a great bubble barrier would require. We don't need new solutions. Developed countries have already solved the problem of river trash with waste management, but since it's not glamorous enough, people only fund these well meaning flashy projects that could create more environmental harm than they prevent.