I was looking at the USGS aerial photographs of the mouth of the Mullica River. I noticed that in alot of the marshy areas, there are really straight lines or channels that run through them. What are they?
Up by me, in Brick, some of our marshy areas have the same thing.
I'm not 100% sure they're man made. You can see them (faintly) on the NJ 1931 aerials, and very clearly on the USGS aerials.
Ben:
As indicated by many others who responded to your query, the ditching you observe is related to mosquito control measures. The state government and all of its entities have produced numerous treatises on controlling this insect, but the one that you should probably examine is Thomas J. Headlee's The Mosquitoes of New Jersey and their Control, published in cooperation with numerous governmental agencies by Rutgers University Press in 1945. This work specifically addresses controlling mosquitoes in Salt Marshes. You can also examine the 1992 National Park Service publication, From Marsh to Farm : The Landscape Transformation of Coastal New Jersey written by Kimberly R. Sebold as part of the New Jersey Coastal Heritage Trail project. If you are interested in learning what other state publications are available relative to mosquito control, please let me know and I will assemble a bibliography of such literature.
Best regards,
Jerseyman