Reducing roadside runoff: Tillage and compost improve stormwater mitigation in urban soils.

Soils adjacent to urban surfaces are often impaired by construction activities that degrade the natural structure and function of the soil, resulting in altered physical, hydraulic, and vegetative properties that limit the infiltration, storage, and filtration of stormwater runoff. A management approach to enhance the efficacy of vegetated roadside soils for runoff control is the use of compost in conjunction with tillage to improve soil conditions and facilitate improved hydrological function, the establishment of vegetative biomass, and increased nutrient and pollutant attenuation. The purpose of this study was to determine the efficacy of soil improvement measures to reduce runoff volumes and improve water quality along roadsides over time. The effects of tillage with and without compost on 1) bulk density and infiltration rates, 2) runoff volumes, and 3) runoff water quality were evaluated during multiple storm events along two long-established interstate roadsides in North Carolina during 2015 and 2017. Experimental plots were established in the grassed areas adjacent to roads and consisted of an untreated control, tillage only, and tillage amended with compost. Tillage alone did not reduce runoff in roadside soils, however, tillage with compost did improve runoff capture. The patterns in hydrologic performance within and among sites suggests that the incorporation of compost in tilled soils may influence storage potential through different effects on soil properties, such as decreasing bulk density or improving vegetation establishment, thereby increasing evapotranspirative withdrawals, depending on soil texture. Tillage increased sediment concentrations in runoff, however, net export of sediments was reduced with the inclusion of compost due to the reduction of runoff quantities compared to undisturbed areas and tillage alone. Control and treatment plots were equally effective in reducing dissolved nutrient and metal concentrations, however, the improved hydrologic performance in plots with compost decreased net nutrient and metal export in most storms. The results of this study suggest that the incorporation of compost in compacted urban soils may provide significant improvements for biological and physical soil properties that affect stormwater interception and infiltration.

Married with children: the influence of parental status and gender on ambulatory blood pressure.

BACKGROUND: Although there is substantial evidence that social relationships and marriage may influence both psychological and physical health, little is known about the influence of children. PURPOSE: This study examined the competing predictions regarding the directional influence of parental status and its interaction with gender-given that mothers are typically disproportionately more responsible for everyday care of children-on cardiovascular functioning. METHOD: We examined ambulatory blood pressure (ABP) over 24 hours among 198 married males and females. RESULTS: Couples without children had significantly higher ambulatory SBP and DBP than those with children. Moreover, we found a significant interaction between parental status and gender that suggested women with children showed the lowest ABP, whereas women without children displayed the highest ABP. CONCLUSION: These findings suggest that parenthood, and especially motherhood, may be cardioprotective.