This is the concept and test implementation done in the Sahara. Take a look at Frank Herbert's novel DUNE, to understand that the concept is in use for a long time even in fiction on a grand scale. You basically want a large scale fabric funnel into a teardrop shaped container to preserve the water collected.
https://greenbuildingelements.com/umbrella-design-harvests-desert-moisture-for-childrens-hospital/