Nobody's dogged me out for my suggestion, which I appreciate, and I wanted to reinforce that I didn't offer it with any hope that it would, by itself, solve this problem. And it's probably worth adding, if you tried to lay organic matter there now, it would likely wash away, a fish to fry after you the bigger issue is addressed.
This situation is a perfect though unfortunate example of how it's also easy to ruin the drainage in a particular area.