Groundwater movement and interaction with surface water near the confluence of the Platte and Elkhorn rivers, Nebraska, 2016–18

Abstract

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Floodwater drainage assessment of Offutt Air Force Base, Nebraska, 2020–22

“…Results from topographic surveying, flood inundation mapping, and flow-duration analyses are presented to describe the ability of the current stormwater infrastructure to drain ponded surface water on Offutt Air Force Base after storm events and to understand the effects of the Missouri River on the drainage of floodwaters. Water-level and survey data collected during this study are published in a USGS data release (Hobza, 2023).…”

“…To improve the understanding of groundwater movement and interaction with surface water under varying hydrologic conditions, two synoptic groundwater-and surfacewater-level surveys were completed during late summer 2020 (August 31-September 3, 2020) and during spring 2021 (May 3-5, 2021). All data were collected over a short period (less than 1 week) to provide an accurate representation of hydrologic conditions; the groundwater-and surface-waterlevel data are available in Hobza (2023), and groundwater levels are stored in the USGS National Water Information System database (U.S. Geological Survey, 2022).…”

“…In total, 29 and 36 surface-water features were surveyed for the late summer 2020 and spring 2021 synoptic water-level surveys, respectively (Hobza, 2023). Discrete groundwater-level measurements were collected in accordance with the guidelines and protocols described in Cunningham and Schalk (2011).…”

“…Discrete groundwater-level measurements were collected in accordance with the guidelines and protocols described in Cunningham and Schalk (2011). For the late summer and spring synoptic water-level surveys, groundwater levels were measured in the same set of 24 wells within and near AOC 1 and AOC 2 (Hobza, 2023). The land-surface elevation of each monitoring well was surveyed concurrent with the late summer 2020 synoptic water-level survey (Hobza, 2023).…”

“…For the late summer and spring synoptic water-level surveys, groundwater levels were measured in the same set of 24 wells within and near AOC 1 and AOC 2 (Hobza, 2023). The land-surface elevation of each monitoring well was surveyed concurrent with the late summer 2020 synoptic water-level survey (Hobza, 2023). Land-surface elevations were measured using an RTN approach described in Rydlund and Densmore (2012).…”