Similarly, erosion is only a problem when we try to fix property lines or build structures in an inherently unstable environment, when the long-term change in many locations is dominated by landward movement of the shoreline. Besides these obvious effects of sea-level rise, other evidence can be found by the careful observers in many parts of Maine. Rising sea-level results in drowning of sloping upland margins. Other changes in vegetation may require an expert to discover, but in fact the inexorable rise in sea level drives ecological changes at the shoreline. Below ground, rising sea level can also influence our environment.
Saltwater intrusion can eventually ruin wells and affect soils and ground water.
Saltwater intrusion occures as sea-level rise and causes drowning, but in actuality, human development and use of water resources is a much more rapid cause of change. This is a serious problem in many parts of the United States, and likely will become more publicized in Maine as development pressures continue. Reliable predictions for future change must be built on a scientifically defendable basis. There are several approaches. One approach is to conduct computer model studies, based on the best available information on climate, glacial, and ocean processes.