In total, the effort maps approximately 19.6 million kilometers of waterways, including 818,000 confluences, 67,000 bifurcations, and 31,000 outlets—6,500 of which flow into closed basins. Most ...

The action of tides and waves results in a net super-elevation of the mean groundwater surface above the elevation of mean sea level at the ocean boundary to unconfined coastal aquifers. A ...