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Journal articles on the topic 'Watersheds. Mississippi River Valley'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 February 2022

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1

Kidder, Tristram R. "Climate Change and the Archaic to Woodland Transition (3000–2500 Cal B.P.) in the Mississippi River Basin." American Antiquity 71, no. 2 (2006): 195–231. http://dx.doi.org/10.2307/40035903.

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Archaeologists frequently assume the cultural transition from Archaic to Woodland (ca. 3000–2500 cal B.P.) in the Mississippi River basin is a gradual process. In the lower Mississippi Valley, however, there is an abrupt gap in the archaeological sequence at this time and pronounced differences between Late Archaic and Early Woodland archaeological remains. Elsewhere in the basin, this transition is marked by an occupation hiatus or decline and is accompanied by significant changes in settlement and material culture organization. In most parts of the floodplain of the Mississippi River and its

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2

Ouyang, Ying, Wei Jin, Johnny M. Grace, Sunday E. Obalum, Wayne C. Zipperer, and Xiaoqing Huang. "Estimating impact of forest land on groundwater recharge in a humid subtropical watershed of the Lower Mississippi River Alluvial Valley." Journal of Hydrology: Regional Studies 26 (December 2019): 100631. http://dx.doi.org/10.1016/j.ejrh.2019.100631.

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3

Duell, Rebecca S., and Matthew S. Van Den Broeke. "Climatology, Synoptic Conditions, and Misanalyses of Mississippi River Valley Drylines." Monthly Weather Review 144, no. 3 (2016): 927–43. http://dx.doi.org/10.1175/mwr-d-15-0108.1.

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Abstract The dryline is an important focal point for convection initiation. Although drylines most commonly occur on the southern Great Plains, dryline passages and subsequent severe weather outbreaks have been documented in the Mississippi River valley. This study presents a 15-yr (1999–2013) climatology of these Mississippi River valley drylines and associated severe weather. Additionally, synoptic patterns are identified that may result in drylines moving atypically far eastward into the Mississippi River valley. In total, 39 Mississippi River valley drylines (hereafter referred to as MRV d

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4

Theiling, Charles H., and John M. Nestler. "River stage response to alteration of Upper Mississippi River channels, floodplains, and watersheds." Hydrobiologia 640, no. 1 (2010): 17–47. http://dx.doi.org/10.1007/s10750-009-0066-5.

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5

Pocock, Emil, and John S. Wozniak. "Historic Lifestyles in the Upper Mississippi River Valley." Western Historical Quarterly 16, no. 2 (1985): 210. http://dx.doi.org/10.2307/969684.

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6

Van Arsdale, Roy B., Randel T. Cox, and David N. Lumsden. "Quaternary Uplift in the Lower Mississippi River Valley." Journal of Geology 127, no. 1 (2019): 1–13. http://dx.doi.org/10.1086/700405.

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7

Becher, Kent D., Douglas J. Schnoebelen, and Kimberlee K. B. Akers. "NUTRIENTS DISCHARGED TO THE MISSISSIPPI RIVER FROM EASTERN IOWA WATERSHEDS, 1996.1997." Journal of the American Water Resources Association 36, no. 1 (2000): 161–73. http://dx.doi.org/10.1111/j.1752-1688.2000.tb04257.x.

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8

Leigh, David S., and James C. Knox. "AMS Radiocarbon Age of the Upper Mississippi Valley Roxana Silt." Quaternary Research 39, no. 3 (1993): 282–89. http://dx.doi.org/10.1006/qres.1993.1035.

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AbstractAccelerator mass spectrometer radiocarbon ages of the Roxana Silt (loess) along the Upper Mississippi Valley of Wisconsin and Minnesota indicate that loess sedimentation of the Roxana Silt occurred between about 55,000 and 27,000 14 C yr B.P. However, due to local environmental controls, the basal age at any given site may range from 55,000 to 35,000 14C yr B.P. The radiocarbon ages presented here are in agreement with previous radiocarbon ages for the Roxana Silt in its type area of west-central Illinois, but indicate that long-term sedimentation rates along the bluffline of the Upper

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9

Knox, James C. "Responses of Floods to Holocene Climatic Change in the Upper Mississippi Valley." Quaternary Research 23, no. 3 (1985): 287–300. http://dx.doi.org/10.1016/0033-5894(85)90036-5.

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Dimensions of Holocene relict channels and sedimentological characteristics of point bars associated with these relict channels were used to reconstruct a Holocene history of long-term changes in magnitudes of 1.58-yr floods in Upper Mississippi Valley watersheds of southwestern Wisconsin. The reconstructed record of floods shows relatively large and persistent (nonrandom) departures from contemporary long-term average flood magnitudes. The flood history indicates climatic changes that are broadly similar to climatic changes indicated from fossil pollen in the same region. The Holocene floods

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10

Lombardi, Ray, Lisa Davis, Gary E. Stinchcomb, Samuel E. Munoz, Lance Stewart, and Matthew D. Therrell. "Fluvial activity in major river basins of the eastern United States during the Holocene." Holocene 30, no. 9 (2020): 1279–95. http://dx.doi.org/10.1177/0959683620919978.

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In the eastern United States, existing paleo-reconstructions in fluvial environments consist primarily of site-specific investigations of climate and human impacts on riverine processes. This paper presents the first meta-analysis of fluvial reconstructions focused on regional watersheds of the eastern United States, including the Lower Mississippi, Tennessee, South Atlantic–Gulf Coast, Ohio, Mid-Atlantic, and New England regional watersheds. Chronologies of fluvial activity (i.e. alluvial deposition) and stability (i.e. landscape stability) were developed by synthesizing data from existing, p

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11

Theler, James L., and Robert F. Boszhardt. "Twelve Millennia Archaeology of the Upper Mississippi River Valley." Plains Anthropologist 48, no. 186 (2003): 166. http://dx.doi.org/10.1080/2052546.2003.11949306.

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12

Van Arsdale, Roy B., William B. Cupples, and Ryan M. Csontos. "Pleistocene–Holocene transition in the central Mississippi River valley." Geomorphology 214 (June 2014): 270–82. http://dx.doi.org/10.1016/j.geomorph.2014.02.011.

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13

Berlin, Cynthia, and Gregory Chu. "Photographic Journal: The Great River Road in the Upper Mississippi River Valley." Focus on Geography 49, no. 2 (2006): 14–23. http://dx.doi.org/10.1111/j.1949-8535.2006.tb00162.x.

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14

Holle, Chas G. "SEDIMENTATION AT THE MOUTH OF THE MISSISSIPPI RIVER." Coastal Engineering Proceedings 1, no. 2 (2000): 10. http://dx.doi.org/10.9753/icce.v2.10.

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Sedimentation it the mouth of the Mississippi River is a phenomenon that has been under study by the Corps of Engineers, Department of the Army, during the past 120 years. The primary objective in these investigations has been the determination of the most economical method of maintaining required navigation depths through the Mississippi River Passes for oceangoing vessels that serve the Ports of New Orleans, Baton Rouge, and indirectly the vast Mississippi Valley river traffic.

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15

Sterling, Ken A., Stuart V. Nielsen, Andrew J. Brown, Melvin L. Warren, Jr., and Brice P. Noonan. "Cryptic diversity among Yazoo Darters (Percidae: Etheostoma raneyi) in disjunct watersheds of northern Mississippi." PeerJ 8 (May 4, 2020): e9014. http://dx.doi.org/10.7717/peerj.9014.

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The Yazoo Darter, Etheostoma raneyi (Percidae), is an imperiled freshwater fish species endemic to tributaries of the Yocona and Little Tallahatchie rivers of the upper Yazoo River basin, in northern Mississippi, USA. The two populations are allopatric, isolated by unsuitable lowland habitat between the two river drainages. Relevant literature suggests that populations in the Yocona River represent an undescribed species, but a lack of data prevents a thorough evaluation of possible diversity throughout the range of the species. Our goals were to estimate phylogenetic relationships of the Yazo

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16

Smith, John W., and Rochelle B. Renken. "Reproductive Success of Least Terns in the Mississippi River Valley." Colonial Waterbirds 16, no. 1 (1993): 39. http://dx.doi.org/10.2307/1521554.

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17

Whitehead, Donald R., and Mark C. Sheehan. "Holocene Vegetational Changes in the Tombigbee River Valley, Eastern Mississippi." American Midland Naturalist 113, no. 1 (1985): 122. http://dx.doi.org/10.2307/2425354.

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18

Theler, James L., and Matthew G. Hill. "Late Holocene shellfish exploitation in the Upper Mississippi River valley." Quaternary International 530-531 (October 2019): 146–56. http://dx.doi.org/10.1016/j.quaint.2019.04.011.

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19

Miller, Mark W., and Thomas D. Nudds. "Prairie Landscape Change and Flooding in the Mississippi River Valley." Conservation Biology 10, no. 3 (1996): 847–53. http://dx.doi.org/10.1046/j.1523-1739.1996.10030847.x.

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20

Wang, Shuying, and Ronaldo Luna. "Monotonic Behavior of Mississippi River Valley Silt in Triaxial Compression." Journal of Geotechnical and Geoenvironmental Engineering 138, no. 4 (2012): 516–25. http://dx.doi.org/10.1061/(asce)gt.1943-5606.0000603.

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21

King, Sammy L., and Bobby D. Keeland. "Evaluation of Reforestation in the Lower Mississippi River Alluvial Valley." Restoration Ecology 7, no. 4 (1999): 348–59. http://dx.doi.org/10.1046/j.1526-100x.1999.72029.x.

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22

Zaitchik, Benjamin F., Matthew Rodell, and Rolf H. Reichle. "Assimilation of GRACE Terrestrial Water Storage Data into a Land Surface Model: Results for the Mississippi River Basin." Journal of Hydrometeorology 9, no. 3 (2008): 535–48. http://dx.doi.org/10.1175/2007jhm951.1.

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Abstract Assimilation of data from the Gravity Recovery and Climate Experiment (GRACE) system of satellites yielded improved simulation of water storage and fluxes in the Mississippi River basin, as evaluated against independent measurements. The authors assimilated GRACE-derived monthly terrestrial water storage (TWS) anomalies for each of the four major subbasins of the Mississippi into the Catchment Land Surface Model (CLSM) using an ensemble Kalman smoother from January 2003 to May 2006. Compared with the open-loop CLSM simulation, assimilation estimates of groundwater variability exhibite

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23

Curry, B. Brandon. "Evidence at Lomax, Illinois, for Mid-Wisconsin (∼40,000 yr B.P.) Position of the Des Moines Lobe and for Diversion of the Mississippi River by the Lake Michigan Lobe (20,350 yr B.P.)." Quaternary Research 50, no. 2 (1998): 128–38. http://dx.doi.org/10.1006/qres.1998.1985.

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An abrupt change in environment from a wetland to a deeper slackwater lake at 20,345 ± 85 yr B.P. occurred in a second-order valley tributary to the Mississippi River near Lomax, Illinois. The age of this shift is associated with the overflow of glacial Lake Milan and diversion of the Mississippi River from the Princeton Valley (Rock Island to Peoria) to its present course (Rock Island to St. Louis). The diversion occurred due to blockage of the Princeton Valley segment of the ancient Mississippi River by the Lake Michigan Lobe, impoundment of glacial Lake Milan, and eventual overflow of the l

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24

Lynott, Mark J., Hector Neff, James E. Price, James W. Cogswell, and Michael D. Glascock. "Inferences about Prehistoric Ceramics and People in Southeast Missouri: Results of Ceramic Compositional Analysis." American Antiquity 65, no. 1 (2000): 103–26. http://dx.doi.org/10.2307/2694810.

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AbstractCeramic compositional studies using Instrument Neutron Activation Analysis indicates that it is possible to distinguish between ceramics manufactured from clays originating in the Central Mississippi River valley and clays originating in the Eastern Ozarks. The study also documents that shell-tempered ceramics were being made from Eastern Ozark clays during the period A.D. 700 to A.D. 1000. Shell-tempered ceramics made from clays originating in the Western Lowlands also are found at sites in the Eastern Ozarks during this time period, providing evidence for interaction between the East

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25

Potter, Christopher, John Shupe, Peggy Gross, Vanessa Genovese, and Steven Klooster. "Modeling river discharge rates in California watersheds." Journal of Water and Climate Change 1, no. 1 (2010): 36–54. http://dx.doi.org/10.2166/wcc.2010.012.

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River discharge rates across all California's watershed have been modeled using the NASA version of the Carnegie-Ames-Stanford Approach (CASA) ecosystem model coupled with a surface hydrologic routing scheme previously called the Hydrological Routing Algorithm (HYDRA). To assess CASA-HYDRA's capability to estimate actual water flows in extreme and non-extreme precipitation years, we have organized hundreds of California river gauge records for comparison to monthly model predictions. Previously, CASA-HYDRA snowmelt algorithms were modified with equations from the USDA Snowmelt Runoff Model, wh

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26

Lindbo, D. L., F. E. Rhoton, W. H. Hudnall, N. E. Smeck, and J. M. Bigham. "Loess Stratigraphy and Fragipan Occurrence in the Lower Mississippi River Valley." Soil Science Society of America Journal 61, no. 1 (1997): 195–210. http://dx.doi.org/10.2136/sssaj1997.03615995006100010028x.

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27

Knox, James C. "Agricultural influence on landscape sensitivity in the Upper Mississippi River Valley." CATENA 42, no. 2-4 (2001): 193–224. http://dx.doi.org/10.1016/s0341-8162(00)00138-7.

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28

Schumm, S. A., and William J. Spitz. "Geological influences on the Lower Mississippi River and its alluvial valley." Engineering Geology 45, no. 1-4 (1996): 245–61. http://dx.doi.org/10.1016/s0013-7952(96)00016-6.

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29

HATHEWAY, A. W. "Geomorphology and Quaternary Geologic History of the Lower Mississippi River Valley." Environmental & Engineering Geoscience II, no. 2 (1996): 271–72. http://dx.doi.org/10.2113/gseegeosci.ii.2.271.

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30

Gomez, Basil, L. A. K. Mertes, J. D. Phillips, F. J. Magilligan, and L. A. James. "Sediment characteristics of an extreme flood: 1993 upper Mississippi River valley." Geology 23, no. 11 (1995): 963. http://dx.doi.org/10.1130/0091-7613(1995)023<0963:scoaef>2.3.co;2.

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31

Hanberry, Brice B., John M. Kabrick, Hong S. He, and Brian J. Palik. "Historical trajectories and restoration strategies for the Mississippi River Alluvial Valley." Forest Ecology and Management 280 (September 2012): 103–11. http://dx.doi.org/10.1016/j.foreco.2012.05.033.

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32

Gomez, Basil, J. D. Phillips, F. J. Magilligan, and L. A. James. "Floodplain sedimentation and sensitivity: summer 1993 flood, Upper Mississippi River Valley." Earth Surface Processes and Landforms 22, no. 10 (1997): 923–36. http://dx.doi.org/10.1002/(sici)1096-9837(199710)22:10<923::aid-esp763>3.0.co;2-e.

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33

Bettis, E. Arthur, Richard G. Baker, Brenda K. Nations, and David W. Benn. "Early Holocene Pecan, Carya Illinoensis, in the Mississippi River Valley Near Muscatine, Iowa." Quaternary Research 33, no. 1 (1990): 102–7. http://dx.doi.org/10.1016/0033-5894(90)90088-3.

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AbstractA fossil pecan, Carya illinoensis (Wang.) K. Koch, from floodplain sediments of the Mississippi River near Muscatine, Iowa, was accelerator-dated at 7280 ± 120 yr B.P. This discovery indicates that pecan was at or near its present northern limit by that time. Carya pollen profiles from the Mississippi River Trench indicate that hickory pollen percentages were much higher in the valley than at upland locations during the early Holocene. Pecan, the hickory with the most restricted riparian habitat, is the likely candidate for producing these peaks in Carya pollen percentages. Therefore,

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34

Johnson, W. Hilton, and Leon R. Follmer. "Source and Origin of Roxana Silt and Middle Wisconsinan Midcontinent Glacial Activity." Quaternary Research 31, no. 3 (1989): 319–31. http://dx.doi.org/10.1016/0033-5894(89)90040-9.

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AbstractThick Roxana Silt (middle Wisconsinan) in central and southwestern Illinois traditionally has been interpreted as loess derived from valley-train deposits in the ancient Mississippi River valley. Winters et al. (H. A. Winters, J. J. Alford, and R. L. Rieck, Quaternary Research 29, 25–35, 1988) recently suggested that the Roxana was not directly related to glacial activity, but was derived from sediment produced by increased shoreline and spillway erosion associated with a fluctuating ancestral Lake Michigan. Because (1) paleoenvironmental and paleohydrologic conditions inferred in the

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35

Ward, Brent C., and Bruce Thomson. "Late Pleistocene stratigraphy and chronology of lower Chehalis River valley, southwestern British Columbia: evidence for a restricted Coquitlam Stade." Canadian Journal of Earth Sciences 41, no. 7 (2004): 881–95. http://dx.doi.org/10.1139/e04-037.

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Sediments in lower Chehalis valley span middle Wisconsin (Olympia nonglacial interval) to Holocene time. Sediments are divided into six units with chronological control provided by 14 new radiocarbon ages. Fluvial gravel spans the transition from the late Olympia nonglacial interval to the early Fraser Glaciation. Glaciolacustrine sedimentation represents the first definitive glacial activity in the valley and indicates that Vashon ice in the Fraser Lowland blocked the mouth of the Chehalis valley at ca. 1817 ka BP. Ice then flowed down the Chehalis valley. The Chehalis valley deglaciated whi

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36

Wickert, Andrew D., Robert S. Anderson, Jerry X. Mitrovica, Shawn Naylor, and Eric C. Carson. "The Mississippi River records glacial-isostatic deformation of North America." Science Advances 5, no. 1 (2019): eaav2366. http://dx.doi.org/10.1126/sciadv.aav2366.

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The imprint of glacial isostatic adjustment has long been recognized in shoreline elevations of oceans and proglacial lakes, but to date, its signature has not been identified in river long profiles. Here, we reveal that the buried bedrock valley floor of the upper Mississippi River exhibits a 110-m-deep, 300-km-long overdeepening that we interpret to be a partial cast of the Laurentide Ice Sheet forebulge, the ring of flexurally raised lithosphere surrounding the ice sheet. Incision through this forebulge occurred during a single glacial cycle at some time between 2.5 and 0.8 million years be

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37

Ehalt Macedo, Heloisa, Ralph Edward Beighley, Cédric H. David, and John T. Reager. "Using GRACE in a streamflow recession to determine drainable water storage in the Mississippi River basin." Hydrology and Earth System Sciences 23, no. 8 (2019): 3269–77. http://dx.doi.org/10.5194/hess-23-3269-2019.

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Abstract. The study of the relationship between water storage and runoff generation has long been a focus of the hydrological sciences. NASA's Gravity Recovery and Climate Experiment (GRACE) mission provides monthly depth-integrated information on terrestrial water storage anomalies derived from time-variable gravity observations. As the first basin-scale storage measurement technique, these data offer potentially novel insight into the storage–discharge relationship. Here, we apply GRACE data in a streamflow recession analysis with river discharge measurements across several subdomains of the

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38

Meulemans, Matthew J., Christopher S. Jones, Keith E. Schilling, Nathan C. Young, and Larry J. Weber. "Assessment of Spatial Nitrate Patterns in An Eastern Iowa Watershed Using Boat-Deployed Sensors." Water 12, no. 1 (2020): 146. http://dx.doi.org/10.3390/w12010146.

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Water quality sensors deployed on boats, buoys, and fixed monitoring stations along rivers allow high frequency monitoring at dense spatial and temporal resolutions. Research characterizing nitrate (NO3–N) delivery along extended reaches of navigable rivers, however, is sparse. Since land use and stream biogeochemistry can vary within agricultural watersheds, identifying detailed spatial patterns of stream NO3–N can help identify source area contributions that can be used to develop strategies for water quality improvement. Identifying spatial patterns is especially critical in agricultural wa

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39

Majewski, Michael S., William T. Foreman, and Donald A. Goolsby. "Pesticides in the atmosphere of the Mississippi River Valley, part I — rain." Science of The Total Environment 248, no. 2-3 (2000): 201–12. http://dx.doi.org/10.1016/s0048-9697(99)00543-4.

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40

Foreman, W. T., M. S. Majewski, D. A. Goolsby, F. W. Wiebe, and R. H. Coupe. "Pesticides in the atmosphere of the Mississippi River Valley, part II — air." Science of The Total Environment 248, no. 2-3 (2000): 213–26. http://dx.doi.org/10.1016/s0048-9697(99)00544-6.

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41

Morrow, Juliet E. "Early Paleoindian Mobility and Watercraft: An Assessment from the Mississippi River Valley." Midcontinental Journal of Archaeology 39, no. 2 (2014): 103–29. http://dx.doi.org/10.1179/2327427113y.0000000001.

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42

Dyer, Jamie, and Andrew Mercer. "Assessment of Spatial Rainfall Variability over the Lower Mississippi River Alluvial Valley." Journal of Hydrometeorology 14, no. 6 (2013): 1826–43. http://dx.doi.org/10.1175/jhm-d-12-0163.1.

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Abstract A large portion of the lower Mississippi River alluvial valley (LMRAV) relies on irrigation from the regional alluvial aquifer for crop sustainability, which is expensive both in terms of water resources and farmer expenditures because of the large volume of water necessary to maintain crop production. As a result, knowledge of the seasonal frequency and distribution of precipitation over the LMRAV is critical for water resources management, the development of irrigation strategies, and economic planning. This project addresses the need for a detailed assessment of regional precipitat

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43

D. J. Pitts, R. E. Wright, J. A. Kimbrough, and D. R. Johnson. "Furrow Irrigated Cotton on Clayey Soil in the Lower Mississippi River Valley." Applied Engineering in Agriculture 6, no. 4 (1990): 446–52. http://dx.doi.org/10.13031/2013.26412.

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44

Lichtenberg, Janene S., Sammy L. King, James B. Grace, and Susan C. Walls. "Habitat associations of chorusing anurans in the Lower Mississippi River Alluvial Valley." Wetlands 26, no. 3 (2006): 736–44. http://dx.doi.org/10.1672/0277-5212(2006)26[736:haocai]2.0.co;2.

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45

Boszhardt, Robert F. "Additional Western Lithics for Hopewell Bifaces in the Upper Mississippi River Valley." Plains Anthropologist 43, no. 165 (1998): 275–86. http://dx.doi.org/10.1080/2052546.1998.11931872.

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46

Knight, S. S., M. A. Locke, and S. Smith. "Effects of agricultural conservation practices on oxbow lake watersheds in the Mississippi River alluvial plain." Soil and Water Research 8, No. 3 (2013): 113–23. http://dx.doi.org/10.17221/45/2012-swr.

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Agricultural lands are considered to be a major source of nonpoint source pollutants such as sediment, pesticides and nutrients in the United States. Conservation practices have been tested for their effectiveness in reducing agricultural related pollutants on smaller scales, but farm watershed scale assessments of these practices are limited and few of these have evaluated the impacts on downstream ecology. Several projects focused on oxbow lake watersheds in the Mississippi River alluvial plain were designed to utilize working farms to evaluate primary pollutants in water resources and to id

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47

Reba, Michele L., and Joseph H. Massey. "Surface Irrigation in the Lower Mississippi River Basin: Trends and Innovations." Transactions of the ASABE 63, no. 5 (2020): 1305–14. http://dx.doi.org/10.13031/trans.13970.

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HighlightsBetween 1950 and 2017, there was a 12-fold increase in irrigated area in Arkansas and a doubling in Louisiana.Groundwater provides over 90% of the irrigation water applied to the 4 Mha of cropland in the LMRB.Ongoing efforts to address aquifer declines have been multi-faceted and include those of producers, public (local, state, and federal) institutions, and private organizations.Irrigation water management innovations include precision grading, reduced-flood or no-flood rice irrigation, pump automation, computerized hole selection, flowmeter requirements, and permit-based water use

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48

Riley, Thomas J., Gregory R. Walz, Charles J. Bareis, Andrew C. Fortier, and Kathryn E. Parker. "Accelerator Mass Spectrometry (AMS) Dates Confirm Early Zea Mays in the Mississippi River Valley." American Antiquity 59, no. 3 (1994): 490–98. http://dx.doi.org/10.2307/282461.

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Two accelerator mass spectrometry (AMS) dates obtained from samples of Zea mays from the Holding site, 11MS118, in the American Bottom near East St. Louis, Illinois, establish the presence of maize in the Mississippi Valley between 170 B.C. and A.D. 60. The dates finally establish the occurrence of Middle Woodland maize in Illinois and are the earliest dates thus far for maize east of the Mississippi River. Other reports of early Middle Woodland maize in the Midcontinent region should not be discounted unless AMS dating and other supporting information show the maize to be a contaminant at the

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49

Rojas Briceño, Nilton B., Elgar Barboza Castillo, Oscar Andrés Gamarra Torres, et al. "Morphometric Prioritization, Fluvial Classification, and Hydrogeomorphological Quality in High Andean Livestock Micro-Watersheds in Northern Peru." ISPRS International Journal of Geo-Information 9, no. 5 (2020): 305. http://dx.doi.org/10.3390/ijgi9050305.

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Anthropic activity affects the hydrogeomorphological quality of fluvial systems. River and valley classifications are fundamental preliminary steps in determining their ecological status, and their prioritization is essential for the proper planning and management of soil and water resources. Given the importance of the High Andean livestock micro-watershed (HAL-MWs) ecosystems in Peru, an integrated methodological framework is presented for morphometric prioritization that uses a Principal Component Analysis (PCA) and Weighted Sum Approach (WSA), geomorphological fluvial classifications (chan

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50

Mirecki, June E., and Barry B. Miller. "Aminostratigraphic Correlation and Geochronology of Two Quaternary Loess Localities, Central Mississippi Valley." Quaternary Research 41, no. 3 (1994): 289–97. http://dx.doi.org/10.1006/qres.1994.1033.

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AbstractAmino acid epimeric (aIle/Ile) values from terrestrial molluscs are used to define and correlate three aminozones in loess sequences exposed across the central Mississippi Valley, in Arkansas and Tennessee. Three superposed aminozones are defined at Wittsburg quarry, Arkansas, primarily using aIle/Ile values from total hydrolysates of the gastropod genus Hendersonia: Peoria Loess (aIle/Ile = 0.07 ± 0.01), Roxana Silt (0.14 ± 0.02), and a third loess (0.28 ± 0.06). Loess units at Wittsburg quarry can be correlated on lithologic characteristics eastward across the Mississippi Valley to t

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