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If you are into industrial blight, then Arthur Kill is the place for you! Endure all the sights, sounds, and smells of Staten Island without actually going there! Maybe get a tetanus shot first.
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The Elizabeth River is highly urbanized and difficult to access, hence the purple markers on the map.
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The lower Passaic River is extremely polluted. I wouldn't go anywhere near it.
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The Rahway River rises in Essex County as two separate branches. The West Branch begins at spring-fed Crystal Lake in West Orange and flows south through the South Mountain Reservation in the valley between first and second ridges of the Watchung Mountains. It runs directly through downtown Millburn. The East Branch rises as a surface stream in West Orange and forms part of the boundary between West Orange and Orange, then travels through the towns of South Orange and Maplewood.
The two branches meet at Hobart Gap near Interstate 78, continuing south through the Union County communities of Springfield, Union, Cranford and Clark. In Rahway the river receives the Robinson's Branch and South Branch, which are approximately 10 miles long. The South Branch starts in Roosevelt Park in Edison behind the Menlo Park Mall, and flows through Edison, Iselin, and Rahway. The river's mouth is at the Arthur Kill between Carteret (on the south) and Linden (on the north), opposite Port Mobil on Staten Island.
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Sedges and Reeds are superficially similar, but actually quite different. But unless you are a biologist - who cares? ( Reeds are grasses, sedges are sedges. )
Sedges
Sedges tolerate a wide range of salinity, from freshwater to seawater, although they seem to grow best in brackish water. So, like above, if you are exploring a bay or inlet, that stuff all around you is most likely sedge.
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