The legacy effects of mosquito ditching have made salt marshes more vulnerable to flooding impacts from climate change, presenting management challenges in New England where the majority of salt marshes have been ditched and greater rates of sea level rise and storm events are being observed. One legacy effect of mosquito ditching appears to be subsidence of the marsh, with greater effects near the ditches and extending into the marsh plain. We found an average of 9 cm subsidence midway between ditches that averaged 14 m apart. Ditch Remediation is a new approach to filling ditches that uses existing hydrology and vegetation to mend ditches from the bottom up to restore marsh plain elevations. Smaller, auxiliary ditches are selected for treatment. Hay is mown, allowed to dry, and rolled into the treatment ditch where it is held using twine. Nine ditches in four areas were treated in fall 2014 and 2015. Depth of treated ditches decreased an average of 18 cm by fall 2017, and Spartina alterniflora colonized the ditch centers (plant cover and stem density increased). It is unknown whether the trajectory of filling and revegetation of the ditches will continue on their own or if the reduction in drainage depth will stimulate marsh plain building. Ditch remediation could remove excessive drainage effects of half the ditches, thereby approaching an optimal drainage density that may allow tidal marshes to rebuild elevation. This simple and inexpensive technique to reduce ditch impacts should be considered by partnerships that include mosquito control agencies.

蚊沟的遗留效应使盐沼更容易受到气候变化带来的洪灾影响，这在新英格兰地区带来了管理挑战，新英格兰的大部分盐沼已被弃沟，海平面上升和风暴事件的发生率也更高。蚊沟的一种遗留效应似乎是沼泽的沉降，沟渠附近并延伸到沼泽平原的影响更大。我们发现沟渠之间的平均沉降量为9厘米，平均间距为14 m。沟渠修复是一种新的沟渠填充方法，它利用现有的水文和植被从下至上修补沟渠，以恢复沼泽平原的海拔。选择较小的辅助沟渠进行处理。割干草，使其干燥，然后卷入处理沟中，用麻线将其固定。互花米草定居于沟中心（植物覆盖和茎密度增加）。沟渠的充填和恢复植被的轨迹是否会继续下去，或者排水深度的减少是否会刺激沼泽平原的建设，尚不得而知。沟渠修复可以消除一半沟渠的过度排水影响，从而达到最佳排水密度，这可以使潮汐沼泽恢复海拔。包括蚊子控制机构在内的合作伙伴应考虑采用这种简单而廉价的减少沟渠影响的技术。