Laserfiche WebLink
Roseville Soils Testing Annual Report: Year 1 <br />December 29, 2022 <br />Page 5 <br />Soil Respiration: <br />Soil Respiration <br />Nebraska Lab CO2-C, ppm C <br />Site <br />Site Description <br />vegetation <br />management <br />10/15/2021 <br />6/13/2022 <br />10/10/2022 <br />1 <br />swale <br />native <br />2 <br />swale edge <br />turf <br />3 <br />top of berm - compost <br />native <br />24.4 <br />25.3 <br />4 <br />top of berm - CONTROL <br />native <br />17.0 <br />19.4 <br />5 <br />toe of slope - compost <br />turf <br />30.2 <br />46.8 <br />6 <br />1 toe of slope - CONTROL <br />turf <br />18.5 <br />38.8 <br />Soil respiration of 31-70 is about average <br />Soil respiration is a measure of microbial activity. Initial data suggests more microbial activity in composted areas and at <br />the toe of slopes. <br />Saturated Hydraulic Conductivity: <br />Saturated Hydraulic <br />Conductivity <br />Glover Solution, Amozemeter, <br />(in/hr) <br />Darcy's Law, <br />Amozemeterto <br />MPD, (in/hr) <br />Site <br />Site Description <br />vegetation <br />management <br />10/15/2021 <br />6/13/2022 <br />10/10/2022 <br />1 <br />swale <br />native <br />2 <br />swale edge <br />turf <br />3 <br />top of berm - compost <br />native <br />0.30-0.67 <br />1.14-2.10 <br />3.1-9.6 <br />4 <br />top of berm - CONTROL <br />native <br />0.83-0.98 <br />1.69-2.63 <br />2.0-5.4 <br />5 <br />toe of slope - compost <br />turf <br />6 <br />toe of slope - CONTROL <br />turf <br />Saturated hydraulic conductivity in native Roseville soils range from 2 to 40 in/hr, according to the Web Soil Survey, <br />though most are in a 4 to 13 in/hr range. <br />Saturated hydraulic conductivity, used to infer infiltration of stormwater, increased in both the composted and non - <br />composted area. The freeze -thaw cycle likely has more influence on infiltration than compost in the first year after <br />construction. Testing methods changed in October, moving from a subsurface test to a surface test. This changed the <br />equation used to calculate saturated hydraulic conductivity and will also make future measurements easier and more <br />accurate. <br />Page 37 of 69 <br />