Hydrogeology and Geochemistry of Glacial Deposits in Northeastern Kansas

Twelve counties (Atchison, Brown, Doniphan, Douglas, Jackson, Jefferson, Johnson, Leavenworth, Nemaha, Shawnee, Wabaunsee, and Wyandotte) in northeastern Kansas were glaciated during the Pleistocene Epoch. The glacial deposits consist of till, fluvial, loess, and lacustrine deposits locally totalling thicknesses of 400 ft (120 m). A major buried valley 3 mi (5 km) wide, 400 ft (120 m) deep, and 75 mi (120 km) long trends eastward across southern Nemaha, northern Jackson, and central Atchison counties. Several smaller tributary valleys can be identified in Atchison, Nemaha, Brown, Jackson, and Jefferson counties. Other buried valleys generally trend southward to the Kansas River valley or northward into Nebraska and Missouri. The glacial deposits filling the buried valleys locally are clayey. However, most valleys contain at least some water-bearing sand and gravel. Wells drilled into the best water-bearing sand and gravel deposits may yield as much as 900 gallons per minute (gpm; 0.06 m3/sm3/s), but less than 500 gpm (0.03 m3/s) is more common. The alluvial deposits of the Kansas and Missouri river valleys are the major sources of ground water in northeastern Kansas. Wells in these aquifers may have yields of 5,000 gpm (0.3 m3/s), but yields are more commonly less than 3,000 gpm (0.2 m3/s). We analyzed data from 80 pump tests using computer programs to find the best fit for transmissivity (1) and storage (S) values on glacial, alluvial, and bedrock aquifers. Transmissivities in the Missouri River valley alluvium ranged from 200,000 gallons per day per foot (gpd/ft) to 600,000 gpd/ft (2,000-7,000 m2/d), and storage values were between 0.001 and 0.0004. Tests in the Kansas River valley alluvium indicated transmissivities in the range 50,000-600,000 gpd/ft (600-7,000 m2/d) and storage values of 0.03. In the main buried valley across northeastern Kansas, the glacial deposits had T and S values of 2,500-25,600 gpd/ft (31.0-318 m2/d) and 0.00002-0.002, respectively. In the smaller buried valleys the glacial deposits had T values ranging from 1,500 gpd/ft to 100,000 gpd/ft (19-1,200 m2/d). Because of increasing population size in northeastern Kansas, appropriations of water for public and industrial water supplies have been increasing. Most of the pumpage comes from wells in the Kansas and Missouri river valleys. However, in 1981 the Division of Water Resources reported allocations of 1,466 acre-ft of water from wells tapping glacial aquifers associated with the main buried channel across Nemaha, Jackson, and Atchison counties and an additional 837 acre-ft from tributaries associated with the main buried channel. Nemaha County has the largest appropriation of water from the glacial aquifer (1,549 acre-ft/yr in 1983), and Wyandotte County has the largest appropriation of water from the alluvial aquifers (54,250 acre-ft/yr in 1983). Shawnee County has the largest number of ground-water appropriation rights (217). In 1981, for the 12-county study area, the Division of Water Resources found that 773 wells have ground-water appropriation rights. These 773 wells have appropriation rights for 140,484 acre-ft of water from alluvial aquifers, 5,290 acre-ft from glacial aquifers, and 2,146 acre-ft from Pennsylvanian and Permian rock aquifers. Maps for each county show the depth to bedrock, total thickness of Pleistocene sand and gravel deposits, estimated yield of wells, depth to water in wells and test holes, and the saturated thickness of Pleistocene deposits. A bedrock topographic map for the twelve counties was prepared from outcrop data and information from more than 5,000 water well, oil and gas, and test-hole logs. Ground waters from alluvial deposits are hard calcium bicarbonate waters that may have iron concentrations of several milligrams per liter. Sand and gravel associated with the glacial deposits generally yield hard calcium bicarbonate waters and may contain appreciable amounts of iron, manganese, sulfate, and chloride locally. Nitrate concentrations above 45 mg/L are noted in a number of wells of varying depth and aquifer source

Hydrogeology and Geochemistry of Glacial Deposits in Northeastern Kansas

Twelve counties (Atchison, Brown, Doniphan, Douglas, Jackson, Jefferson, Johnson, Leavenworth, Nemaha, Shawnee, Wabaunsee, and Wyandotte) in northeastern Kansas were glaciated during the Pleistocene Epoch. The glacial deposits consist of till, fluvial, loess, and lacustrine deposits locally totalling thicknesses of 400 ft (120 m). A major buried valley 3 mi (5 km) wide, 400 ft (120 m) deep, and 75 mi (120 km) long trends eastward across southern Nemaha, northern Jackson, and central Atchison counties. Several smaller tributary valleys can be identified in Atchison, Nemaha, Brown, Jackson, and Jefferson counties. Other buried valleys generally trend southward to the Kansas River valley or northward into Nebraska and Missouri. The glacial deposits filling the buried valleys locally are clayey. However, most valleys contain at least some water-bearing sand and gravel. Wells drilled into the best water-bearing sand and gravel deposits may yield as much as 900 gallons per minute (gpm; 0.06 m3/sm3/s), but less than 500 gpm (0.03 m3/s) is more common. The alluvial deposits of the Kansas and Missouri river valleys are the major sources of ground water in northeastern Kansas. Wells in these aquifers may have yields of 5,000 gpm (0.3 m3/s), but yields are more commonly less than 3,000 gpm (0.2 m3/s). We analyzed data from 80 pump tests using computer programs to find the best fit for transmissivity (1) and storage (S) values on glacial, alluvial, and bedrock aquifers. Transmissivities in the Missouri River valley alluvium ranged from 200,000 gallons per day per foot (gpd/ft) to 600,000 gpd/ft (2,000-7,000 m2/d), and storage values were between 0.001 and 0.0004. Tests in the Kansas River valley alluvium indicated transmissivities in the range 50,000-600,000 gpd/ft (600-7,000 m2/d) and storage values of 0.03. In the main buried valley across northeastern Kansas, the glacial deposits had T and S values of 2,500-25,600 gpd/ft (31.0-318 m2/d) and 0.00002-0.002, respectively. In the smaller buried valleys the glacial deposits had T values ranging from 1,500 gpd/ft to 100,000 gpd/ft (19-1,200 m2/d). Because of increasing population size in northeastern Kansas, appropriations of water for public and industrial water supplies have been increasing. Most of the pumpage comes from wells in the Kansas and Missouri river valleys. However, in 1981 the Division of Water Resources reported allocations of 1,466 acre-ft of water from wells tapping glacial aquifers associated with the main buried channel across Nemaha, Jackson, and Atchison counties and an additional 837 acre-ft from tributaries associated with the main buried channel. Nemaha County has the largest appropriation of water from the glacial aquifer (1,549 acre-ft/yr in 1983), and Wyandotte County has the largest appropriation of water from the alluvial aquifers (54,250 acre-ft/yr in 1983). Shawnee County has the largest number of ground-water appropriation rights (217). In 1981, for the 12-county study area, the Division of Water Resources found that 773 wells have ground-water appropriation rights. These 773 wells have appropriation rights for 140,484 acre-ft of water from alluvial aquifers, 5,290 acre-ft from glacial aquifers, and 2,146 acre-ft from Pennsylvanian and Permian rock aquifers. Maps for each county show the depth to bedrock, total thickness of Pleistocene sand and gravel deposits, estimated yield of wells, depth to water in wells and test holes, and the saturated thickness of Pleistocene deposits. A bedrock topographic map for the twelve counties was prepared from outcrop data and information from more than 5,000 water well, oil and gas, and test-hole logs. Ground waters from alluvial deposits are hard calcium bicarbonate waters that may have iron concentrations of several milligrams per liter. Sand and gravel associated with the glacial deposits generally yield hard calcium bicarbonate waters and may contain appreciable amounts of iron, manganese, sulfate, and chloride locally. Nitrate concentrations above 45 mg/L are noted in a number of wells of varying depth and aquifer source

A new model for health care delivery

<p>Abstract</p> <p>Background</p> <p>The health care delivery system in the United States is facing cost and quality pressures that will require fundamental changes to remain viable. The optimal structures of the relationships between the hospital, medical school, and physicians have not been determined but are likely to have a large impact on the future of healthcare delivery. Because it is generally agreed that academic medical centers will play a role in the sustainability of this future system, a fundamental understanding of the relative contributions of the stakeholders is important as well as creativity in developing novel strategies to achieve a shared vision.</p> <p>Discussion</p> <p>Core competencies of each of the stakeholders (the hospital, the medical school and the physicians) must complement the others and should act synergistically. At the same time, the stakeholders should determine the common core values and should be able to make a meaningful contribution to the delivery of health care.</p> <p>Summary</p> <p>Health care needs to achieve higher quality and lower cost. Therefore, in order for physicians, medical schools, and hospitals to serve the needs of society in a gratifying way, there will need to be change. There needs to be more scientific and social advances. It is obvious that there is a real and urgent need for relationship building among the professionals whose duty it is to provide these services.</p

The Science Performance of JWST as Characterized in Commissioning

This paper characterizes the actual science performance of the James Webb Space Telescope (JWST), as determined from the six month commissioning period. We summarize the performance of the spacecraft, telescope, science instruments, and ground system, with an emphasis on differences from pre-launch expectations. Commissioning has made clear that JWST is fully capable of achieving the discoveries for which it was built. Moreover, almost across the board, the science performance of JWST is better than expected; in most cases, JWST will go deeper faster than expected. The telescope and instrument suite have demonstrated the sensitivity, stability, image quality, and spectral range that are necessary to transform our understanding of the cosmos through observations spanning from near-earth asteroids to the most distant galaxies

Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data

We present the results of a model-based search for continuous gravitational waves from the low-mass X-ray binary Scorpius X-1 using LIGO detector data from the third observing run of Advanced LIGO, Advanced Virgo and KAGRA. This is a semicoherent search which uses details of the signal model to coherently combine data separated by less than a specified coherence time, which can be adjusted to balance sensitivity with computing cost. The search covered a range of gravitational-wave frequencies from 25Hz to 1600Hz, as well as ranges in orbital speed, frequency and phase determined from observational constraints. No significant detection candidates were found, and upper limits were set as a function of frequency. The most stringent limits, between 100Hz and 200Hz, correspond to an amplitude h0 of about 1e-25 when marginalized isotropically over the unknown inclination angle of the neutron star's rotation axis, or less than 4e-26 assuming the optimal orientation. The sensitivity of this search is now probing amplitudes predicted by models of torque balance equilibrium. For the usual conservative model assuming accretion at the surface of the neutron star, our isotropically-marginalized upper limits are close to the predicted amplitude from about 70Hz to 100Hz; the limits assuming the neutron star spin is aligned with the most likely orbital angular momentum are below the conservative torque balance predictions from 40Hz to 200Hz. Assuming a broader range of accretion models, our direct limits on gravitational-wave amplitude delve into the relevant parameter space over a wide range of frequencies, to 500Hz or more

Search for subsolar-mass black hole binaries in the second part of Advanced LIGO’s and Advanced Virgo’s third observing run

We describe a search for gravitational waves from compact binaries with at least one component with mass 0.2 M⊙–1.0 M⊙ and mass ratio q ≥ 0.1 in Advanced LIGO and Advanced Virgo data collected between 1 November 2019, 15:00 UTC and 27 March 2020, 17:00 UTC. No signals were detected. The most significant candidate has a false alarm rate of 0.2yr−1 ⁠. We estimate the sensitivity of our search over the entirety of Advanced LIGO’s and Advanced Virgo’s third observing run, and present the most stringent limits to date on the merger rate of binary black holes with at least one subsolar-mass component. We use the upper limits to constrain two fiducial scenarios that could produce subsolar-mass black holes: primordial black holes (PBH) and a model of dissipative dark matter. The PBH model uses recent prescriptions for the merger rate of PBH binaries that include a rate suppression factor to effectively account for PBH early binary disruptions. If the PBHs are monochromatically distributed, we can exclude a dark matter fraction in PBHs fPBH ≳ 0.6 (at 90% confidence) in the probed subsolar-mass range. However, if we allow for broad PBH mass distributions we are unable to rule out fPBH = 1. For the dissipative model, where the dark matter has chemistry that allows a small fraction to cool and collapse into black holes, we find an upper bound fDBH &lt; 10−5 on the fraction of atomic dark matter collapsed into black holes