What is the difference between 濱 and 瀕?
On this page there is long explanation, but the summary that 濱 is more used when 濱 has the role of a noun (examples: 水~︱江~︱河~︱湖~︱海~), and 瀕 is more used when 瀕 has the role of a verb (examples: ~江︱~湖︱~海︱~绝︱~临︱~死︱~危︱~于, 东~大海).