+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Evaluation of ground-water chemistry and age in aquifer systems in Lagrange County, Indiana

, : Evaluation of ground-water chemistry and age in aquifer systems in Lagrange County, Indiana. Abstracts with Programs - Geological Society of America 35(6): 146

In 2002, a project was initiated to evaluate the chemistry and relative age of the ground water in LaGrange County, Indiana. The intent of the sampling was to acquire baseline data by analyzing for selected major ions, trace elements, and isotopes in ground water from wells that were not known to contain anthropogenic contaminants. Water samples were collected from 50 wells in the Topeka Fan glacial sequence, an outwash fan deposit of medium to coarse gravel, and the Oliver Lake glacial sequence, a lake deposit of fine-grained sediments. The Topeka Fan is an area of ground-water recharge; the Oliver Lake basin is an area of ground-water discharge. The wells that were sampled ranged in depth from 10 to 220 feet. Nitrate concentrations in the water samples were generally low; 42 of the samples had concentrations below the detection limit (<1 mg/L). Only one of the water samples had a nitrate concentration above the U.S. Environmental Protection Agency Maximum Contaminant Level. Seven of the eight water samples containing nitrates were from wells in the Topeka Fan glacial sequence. Nitrogen isotope values determined for four sites with a minimum of 4 mg/L nitrate nitrogen ranged from 7.60 to 19.3 per mil and indicated that the nitrate sources are largely animal waste. Tritium ranged from below the detection limit (<0.8 TU) to 17.0 TU; 35 of the samples had values above the detection limit. Tritium was generally not detected in waters from wells 80 feet or greater in depth. In regard to potential contamination, the nitrate data suggest that the ground water in the Topeka Fan area is more prone to anthropogenic contamination; tritium data suggest that 60 to 70 percent of the ground water in wells sampled in the Topeka Fan and Oliver Lake areas has been recharged since 1952.


Other references

Jerald, J.; Whitton, M., 2009: Relating Scene-Motion Thresholds to Latency Thresholds for Head-Mounted Displays. As users of head-tracked head-mounted display systems move their heads, latency causes unnatural scene motion. We 1) analyzed scene motion due to latency and head motion, 2) developed a mathematical model relating latency, head motion, scene motio...

Ratynska-Prill, D., 1975: The effect of Strongyloides papillosus infecton on the white blood cell values in goats. Acta parasitologica polonica: 3 (26 40) 403-415

Wada, H.; Kobayashi, M.; Sato, R.; Satoh, N.; Miyasaka, H.; Shirayama, Y., 2001: Dynamic insertion-deletion of introns in deuterostome EF-1alpha genes. To test the validity of intron-exon structure as a phylogenetic marker, the intron-exon structure of EF-1alpha genes was investigated for starfish, acornworms, ascidians, larvaceans, and amphioxus and compared with that of vertebrates. Of the 11 d...

Brock, J.A.; Bloom, K., 1994: A chromosome breakage assay to monitor mitotic forces in budding yeast. During the eukaryotic cell cycle, genetic material must be accurately duplicated and faithfully segregated to each daughter cell. Segregation of chromosomes is dependent on the centromere, a region of the chromosome which interacts with mitotic sp...

Harris, Don J., 2000: Specializing doesn't mean restricting services. DVM 31(11): , 15S

Ghosh, S.K.; D.V.s, C.; McIlroy, I.; Patel, K.R., 1991: Effect of cetirizine on exercise induced asthma. The effect of oral and inhaled cetirizine, a potent and specific H1 receptor antagonist, was studied in patients with exercise induced asthma. Twelve patients (five male; mean age 35.2 years) were given oral placebo or cetirizine 10 mg twice daily...

Smith, C., 2003: Human rights, environment, and individual action. International Journal of Occupational and Environmental Health 9(1): 1-3

Kass, D.C.L.; Valle B.R. del; Bonilla, E.A., 1980: Improving efficiency of maize-cash crop associations in Guatemalan Highlands. Studies were carried out in the central highlands of Guatemala to increase the productivity and profitability of traditional associations of maize, climbing beans [Phaseolus vulgaris] and broad beans (Vicia faba) with which squash, potatoes and bu...

Lukyanov, A.V.; Likhtman, A.E., 2016: Dynamic Contact Angle at the Nanoscale: A Unified View. Generation of a dynamic contact angle in the course of wetting is a fundamental phenomenon of nature. Dynamic wetting processes have a direct impact on flows at the nanoscale, and therefore, understanding them is exceptionally important to emergin...

Volberding, Paul A., 1996: AIDS care in the new world. ELEVENTH INTERNATIONAL CONFERENCE ON AIDS [Author] Eleventh International Conference on AIDS, Vol One One world: One hope : 234-235