A reduction in river flows is a major cause of the shrinking of river deltas. The Ramsar protected Indus Delta is one such example. Due to a consistent reduction in the flows of the Indus River. 15 out of 17 allied creeks facing back flows from the sea. https://www.markbroyard.com/hot-sale-us-topo-7-5-minute-map-for-sunken-lake-mi-supply-limited-grab/