The Union Occupation of Coastal North Carolina

In 1861 and 1862, Union forces invaded and occupied eastern North Carolina. This chapter explores the origins, execution, and consequences of this invasion, looking at its military, social, and political significance. It highlights the weakness of Confederate fortifications along the North Carolina coast and the Union military leadership of Cmdr. Silas Stringham, Maj. Gen. Benjamin Butler, Brig. Gen. Ambrose Burnside, and Capt. Louis Goldsborough. As one of the first sites in the South occupied by the Union Army, coastal North Carolina created an early venue for wartime Reconstruction. The chapter emphasizes how African Americans responded to the Union invasion, escaping from slavery, forming refugee camps in Union enclaves, and working for the Union war effort. In 1862, Military Governor Edward Stanly tried to reinstitute slavery.

Spatially compounded surge events: an example from hurricanes Matthew and Florence

The simultaneous rise of tropical-cyclone-induced flood waters across a large hazard management domain can stretch rescue and recovery efforts. Here we present a means to quantify the connectedness of maximum surge during a storm with geospatial statistics. Tide gauges throughout the extensive estuaries and barrier islands of North Carolina deployed and operating during hurricanes Matthew (n=82) and Florence (n=123) are used to compare the spatial compounding of surge for these two disasters. Moran's I showed the occurrence of maximum storm tide was more clustered for Matthew compared to Florence, and a semivariogram analysis produced a spatial range of similarly timed storm tide that was 4 times as large for Matthew than Florence. A more limited data set of fluvial flooding and precipitation in eastern North Carolina showed a consistent result – multivariate flood sources associated with Matthew were more concentrated in time as compared to Florence. Although Matthew and Florence were equally intense, they had very different tracks and speeds which influenced the timing of surge along the coast.

Pythium spp. associated with root rot and stunting of winter crops in North Carolina

Annual double-crop rotation systems that incorporate winter wheat, clary sage, or a cover crop are common in eastern North Carolina. Stunting and root rot of clary sage (Salvia sclarea L.) reduce yields of this crop, especially in wet soils. Stunting and reduced stand establishment also afflict winter cover crops, including rye, rapeseed, and winter pea. Pythium spp. are causal agents of root rot of winter wheat in this region, but their role in root rot and stunting of other winter crops is not understood. During the growing seasons of 2018-2019 and 2019-2020 samples of clary sage, rye, rapeseed, and winter pea displaying symptoms of stunting were collected across eastern NC, resulting in the recovery of 420 isolates of Pythium from the roots of all hosts. P. irregulare, P. spinosum, and the complex Pythium sp. cluster B2A were the most frequently isolated species from clary sage. P. irregulare and P. spinosum were aggressive pathogens of clary sage at 18°C, and caused moderate root rot at 28°C. Koch’s postulates confirmed that isolates belonging to Pythium sp. cluster B2A, P. sylvaticum, P. pachycaule, P aphanidermatum, P. myriotylum, and P. oopapillum are pathogens of clary sage. P. irregulare (37% of all isolates) and members of the species complex Pythium sp. cluster B2A (28% of all isolates) comprised the majority of isolates collected from all hosts and were the most frequently isolated species from rye, rapeseed, and winter pea. In pathogenicity assays, isolates representing P. irregulare and P. spinosum caused slight to moderate root necrosis on rye, rapeseed, and winter pea. Isolates representing Pythium sp. cluster B2A caused slight to moderate root necrosis on rapeseed and clary sage, but no symptoms on rye or winter pea.

Water table dynamics beneath onsite wastewater systems in eastern North Carolina in response to Hurricane Florence

Onsite wastewater treatment systems (OWSs) are commonly used in eastern North Carolina. A vadose zone or vertical separation distance (VSD) between the OWS drainfield trenches and groundwater is required for effective aerobic wastewater treatment. Extreme weather events, including hurricanes, can deliver significant rainfall that influences groundwater levels and reduces the VSD, thus also influencing the treatment of wastewater by the OWS. Few studies have quantified the effects of storms on the VSD. Groundwater levels at three sites with the OWS were monitored before, during, and after Hurricane Florence. Groundwater rose over 1.5 m within 9 h at the sites in response to rain from the hurricane but took more than 3.5 weeks to return to prestorm levels. Groundwater inundated the drainfield trenches for several days at two sites leading to direct discharge of wastewater to groundwater. The hydraulic gradient and the groundwater velocity increased during the storm and the groundwater flow direction shifted, leading to greater dispersion of wastewater impacted groundwater. The wastewater treatment efficiency of the soil-based OWS in coastal areas may lessen over time because of rising water tables and reduced VSD. Individual pretreatment OWSs, elevated drainfields, or centralized sewage treatment may be required in regions with shrinking VSDs.