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Front Matter, Nckri
Integrating Monitoring Techniques For A Buried Sinkhole In An Urban Environment, Gabriella B. Williams, Vanessa J. Banks, Elisabeth T. Bowman, Anthony H. Cooper, Lee D. Jones, Matthew P. Kirkham, David J R Morgan, Paul Shepley
Integrating Monitoring Techniques For A Buried Sinkhole In An Urban Environment, Gabriella B. Williams, Vanessa J. Banks, Elisabeth T. Bowman, Anthony H. Cooper, Lee D. Jones, Matthew P. Kirkham, David J R Morgan, Paul Shepley
Sinkhole Conference 2020
Ripon is a historic city and market town in North Yorkshire. It is unique in being the only city in the UK to define planning zones based on the potential for bedrock dissolution. The underlying geology comprises marls, limestone and gypsum of the Permian Edlington, Brotherton and Roxby formations, capped by glacial deposits (till). It is the rapid rate of dissolution of the gypsum (hydrated calcium sulphate) that enables the karst to evolve on human time scales. Following the collapse that formed a sinkhole in the rear garden of a property in Magdalens Road, Ripon, UK in November 2016 the …
Characterizing Transport Properties In Karst Conduits Under Different Hydrologic Conditions, Elienisse Rodríguez-Medina, Ingrid Y. Padilla, Fernando Pantoja, Kateleen Vargas, Norma I. Torres
Characterizing Transport Properties In Karst Conduits Under Different Hydrologic Conditions, Elienisse Rodríguez-Medina, Ingrid Y. Padilla, Fernando Pantoja, Kateleen Vargas, Norma I. Torres
Sinkhole Conference 2020
Karst terrains contain very productive aquifers. The hydraulic and hydrogeological characteristics of karst aquifers make these systems capable of storing and transporting large amounts of water, but also highly vulnerable to contamination. Their extremely heterogeneous nature prevents accurate prediction of contaminant fate and transport. Even more challenging is to understand the impact of hydrologic condition changes on fate and transport processes. This study aims at characterizing changes in transport processes in the karst groundwater system of northern Puerto Rico under different hydrologic conditions. The study involves injecting rhodamine wt and uranine tracers into a spring cave, and monitoring concentrations at …
Investigation Of Water Quality And Groundwater Flow In A Karst Watershed In Blanco County, Texas, Robert Salinas, Yongli Gao, Lijun Tian, Yunxia Li, Scott Gardner
Investigation Of Water Quality And Groundwater Flow In A Karst Watershed In Blanco County, Texas, Robert Salinas, Yongli Gao, Lijun Tian, Yunxia Li, Scott Gardner
Sinkhole Conference 2020
In any natural system, environmental and geomorphic responses are more extreme and frequent when caused or affected by human activities. Karst aquifers differ from other aquifer types in that they are composed of complex matrix, fracture, and conduit porosities. As valuable resources for societies and ecosystems, karst aquifers are highly vulnerable to pollution and must be well studied for proper protection.This study combines ongoing monitoring data with hydrochemistry data from sampling sites within the Honeycut Hollow Creek Watershed, Blanco County, Texas. Flow measurements revealed that the discharge of Honeycut Creek Spring does not respond to local precipitation. The wettest September …
Geochemical Evaluation Of Hydrogeologic Interaction Between The Edwards And Trinity Aquifers Based On Multiport Well Assessment In Central Texas, Lijun Tian, Brian A. Smith, Brian B. Hunt, James D. Doster, Yongli Gao
Geochemical Evaluation Of Hydrogeologic Interaction Between The Edwards And Trinity Aquifers Based On Multiport Well Assessment In Central Texas, Lijun Tian, Brian A. Smith, Brian B. Hunt, James D. Doster, Yongli Gao
Sinkhole Conference 2020
The Edwards and Trinity Aquifers are major aquifers of Central Texas that provide water supply for over two million people and contain springs that are hydrologically and ecologically important to the region. The Edwards Aquifer overlies the Trinity Aquifer but is geologically juxtaposed along the Balcones Fault Zone. Thus, understanding the hydrologic connection is necessary to effectively and sustainably manage the two aquifers. Previous studies utilizing several different methods such as water-table evaluations, pumping tests, geophysical surveys, dye-tracing experiments indicated the existence of lateral inter-aquifer flow between the Edwards and Trinity aquifers in some areas. However, lateral inter-aquifer flow does …
Pre-Glacial And Post-Glacial Sinkholes In Silurian Carbonate Rocks In The James Bay Lowland, Canada, Wanfang Zhou, Mingtang Lei, James W. Lamoreaux, Daniel S. Green
Pre-Glacial And Post-Glacial Sinkholes In Silurian Carbonate Rocks In The James Bay Lowland, Canada, Wanfang Zhou, Mingtang Lei, James W. Lamoreaux, Daniel S. Green
Sinkhole Conference 2020
Sinkholes developed in the Paleozoic carbonate rocks within the James Bay lowland of Canada consist of pre-glacial sinkholes and post-glacial sinkholes. Most of the pre-glacial sinkholes were identified in the Upper Silurian Attawapiskat limestone at the Process Plant site after the thin peat and unconsolidated sediment cover were removed and in the Central Quarry site where the vertical profile of the Upper Attawapiskat limestone was exposed. One unique pre-glacial sinkhole was reported in the form of a bedrock trench, which cut through most of the Paleozoic formations to a depth of approximately 200 m below land surface. The pre-glacial sinkholes …
Are The Groundwater Levels Falling In Puerto Rico Between 1982 And 2017: Comparing A Karst Aquifer With Non-Karst Aquifers, Ronald T. Richards
Are The Groundwater Levels Falling In Puerto Rico Between 1982 And 2017: Comparing A Karst Aquifer With Non-Karst Aquifers, Ronald T. Richards
Sinkhole Conference 2020
Puerto Rico is an oceanic tropical archipelago with about 3.2 million inhabitants, located between the Caribbean Sea and the Atlantic Ocean. It has a land area of 9104 km2. Groundwater provides about 15 percent of the freshwater used in Puerto Rico and is an important reserve during droughts. A monthly groundwater level index was calculated for Puerto Rico from 1982 to 2017. Sub-indices were calculated for the karst North Coast Limestone aquifer, the non-karst South Coastal Plain aquifer, and for the non-karst Rest of Puerto Rico. The index was calculated with data from 80 non-pumping observation wells operated …
Environmental Forensic Investigation Of Mystery Sediment Plumes At Barton Springs, Texas, Lindsey Sydow, David A. Johns, Sarah J. Zappitello, Thain Maurer
Environmental Forensic Investigation Of Mystery Sediment Plumes At Barton Springs, Texas, Lindsey Sydow, David A. Johns, Sarah J. Zappitello, Thain Maurer
Sinkhole Conference 2020
The City of Austin Watershed Protection Department (WPD) in Austin, Texas maintains a spill response plan to protect Barton Springs, one of the largest springs in the state that also functions as a municipal swimming pool, endangered species habitat, and well-studied karst research site. From December 18-20, 2018, three discrete sediment plumes of unknown origin emerged from Main Barton Spring and Eliza Spring, presenting an atypical spill scenario. Unlike the majority of spills, where staff respond to a known location, pollutant, and spill volume, WPD responders and staff at the Barton Springs Edwards Aquifer Conservation District (BSEACD) had to work …
Sinkhole Susceptibility Mapping In The Kuala Lumpur And The Need For A Buried Karst Database, Vanessa J. Banks, Elanni Affandi, Tham Fatt Ng, Christian Arnhardt, Zamri Ramli, Ferdaus Ahmad, Joy Pereira, Helen Reeves
Sinkhole Susceptibility Mapping In The Kuala Lumpur And The Need For A Buried Karst Database, Vanessa J. Banks, Elanni Affandi, Tham Fatt Ng, Christian Arnhardt, Zamri Ramli, Ferdaus Ahmad, Joy Pereira, Helen Reeves
Sinkhole Conference 2020
One of the deliverables for the Newton Ungku Omar funded project: Disaster Resilient Cities: Forecasting local level climate extremes and physical hazards for Kuala Lumpur, awarded in 2016, was the development of a sinkhole susceptibility map for Kuala Lumpur. The purpose of the map was to contribute to the examination atmospheric and physical hazards in the context of climate extremes. At the commencement of the project there was no sinkhole database available to either inform or validate the mapping. The geology of the Kuala Lumpur area comprises a flat, alluvial plain underlain by a bedrock inlier of Cambrian Dinding Schist, …
Capabilities, Limitations And Opportunities For Studying Sinkholes Using Synthetic Aperture Radar Interferometry, Cathleen E. Jones
Capabilities, Limitations And Opportunities For Studying Sinkholes Using Synthetic Aperture Radar Interferometry, Cathleen E. Jones
Sinkhole Conference 2020
We give an overview of past work using synthetic aperture radar (SAR) interferometry (InSAR) to detect, observe and characterize sinkholes, present the advantages and disadvantages of using satellite-borne SARs for this application, and discuss the availability to the community of free and open SAR data. In particular, we discuss the planned NASA-ISRO Synthetic Aperture Radar (NISAR) mission, a joint venture between the National Aeronautics and Space Administration (NASA) and the Indian Space Research Organisation (ISRO) currently being built for launch in 2022.
Sinkholes Developed In Sandstone, Ira D. Sasowsky, E. Calvin Alexander Jr.
Sinkholes Developed In Sandstone, Ira D. Sasowsky, E. Calvin Alexander Jr.
Sinkhole Conference 2020
Caves and closed depressions developed in carbonate rocks are defining features of karst terranes. With the increasing recognition that significant caves can develop in quartz (siliciclastic) sandstones, it is natural that we should start to examine their surficial counterparts, sinkholes. A review of the literature shows rather limited attention given to these features. In the glaciated region of northeast Ohio (USA) colleagues and I have examined numerous sinkholes in sandstones, with a variety of morphologies. The most commonly found type is cover subsidence sinkholes, where thin overlying regolith (usually till) has sagged into escarpment-parallel widened fractures. The most significant of …
Spatial And Temporal Imaging Of A Cover-Collapse Sinkhole In West-Central Florida Through High Resolution Remote Sensing And Geophysical Techniques, Christine Downs, Tonian Robinson, Garrett Speed, Jorge Gonzalez Garcia, Noelia Garcia, Lori Collins, Travis Doering, Shawn Landry, David Eilers, Sajad Jazayeri, Sanaz Esmaeili, Sarah Kruse, Jochen Braunmiller, Henok Kiflu
Spatial And Temporal Imaging Of A Cover-Collapse Sinkhole In West-Central Florida Through High Resolution Remote Sensing And Geophysical Techniques, Christine Downs, Tonian Robinson, Garrett Speed, Jorge Gonzalez Garcia, Noelia Garcia, Lori Collins, Travis Doering, Shawn Landry, David Eilers, Sajad Jazayeri, Sanaz Esmaeili, Sarah Kruse, Jochen Braunmiller, Henok Kiflu
Sinkhole Conference 2020
On July 14, 2017, a cover-collapse sinkhole formed in the front yard of a home in Pasco County, FL. Starting as a depression, the initial collapse occurred rapidly (120 minutes) with subsequent slumping over the course of three days. The sinkhole is oval and cone-shaped with a northeast-southwest long axis and ridges on the northwest and west slopes. A combination of remote sensing, geophysics, and soil borings are used to characterize the temporospatial surface changes and subsurface structures at this sinkhole. Repeat surveys started four days post-collapse and concluded 10 months post-collapse. Surface changes over time are computed using terrestrial …
Full Proceedings, Nckri
Gis-Based Spatial Analysis Of Sinkholes In Cebu City, Philippines: Insights On Sinkhole Genesis And Development, Regina Martha G. Lumongsod, Noelynna T. Ramos, Roseanne V. Ramos
Gis-Based Spatial Analysis Of Sinkholes In Cebu City, Philippines: Insights On Sinkhole Genesis And Development, Regina Martha G. Lumongsod, Noelynna T. Ramos, Roseanne V. Ramos
Sinkhole Conference 2020
In 2017, at least 770 sinkholes were reported to occur in Cebu City, a populated town in the Philippines dominantly underlain by karstic formations. In this study, the genesis and development of these sinkholes were related to various geomorphologic, geologic, and hydrologic factors in order to determine their influence on sinkhole distribution in the area using GIS-based spatial analyses. Results show that the sinkhole frequency varies with respect to the relative age of the underlying karstic formation, slope, and elevation. Most sinkholes occur on younger bedrock, low slope, and low elevation areas. However, sinkholes that occur on younger bedrock are …
The Hydrochemical Response Of Heilongtan Springs To The 2010-2012 Droughts Of Yunnan Province, Kunming, China, Hong Liu, Ruiyong Chen, Huacheng Huang, Yinghua Zhang, Yongli Gao
The Hydrochemical Response Of Heilongtan Springs To The 2010-2012 Droughts Of Yunnan Province, Kunming, China, Hong Liu, Ruiyong Chen, Huacheng Huang, Yinghua Zhang, Yongli Gao
Sinkhole Conference 2020
Karst waters from a mountainous recharge area drains toward basin and emerges at the edge of the basin after encountering quaternary sediments. The flow paths are partly covered by Quaternary sediments or other sedimentary rocks, which makes the spring acts as an artesian spring. The spring is more vulnerable to human activities and climate change than the classic confined karst spring. Weakly confined spring is typical in faulted karst basin. Heilongtan Springs are located at the foothills of Wulao Mountains in the northern suburb of Kunming City. They consist of Qingshuitan (QST), Hun-shuitan (HST) and Xiaoshuitan (XST) springs. Spring water …
Submarine Groundwater Discharge Along The Northern Coast Of The Yucatán Peninsula, Dorina Murgulet, Audrey R. Douglas, Jorge Alfredo Herrera Silveira, Ismael Mariño Tapia, Arnoldo Valle-Levinson
Submarine Groundwater Discharge Along The Northern Coast Of The Yucatán Peninsula, Dorina Murgulet, Audrey R. Douglas, Jorge Alfredo Herrera Silveira, Ismael Mariño Tapia, Arnoldo Valle-Levinson
Sinkhole Conference 2020
The peculiar intrinsic geological and hydrogeological features of karst aquifers enable an immense capacity of karst aquifers to store and carry contaminants from sources to potential discharge zones (e.g., coastal seas). In coastal settings, the function of karst aquifers is closely linked to the sea. Submarine groundwater discharge (SGD) is critical for coastal ecosystems and their services. This research aims to promote understanding of the spatial variability of SGD, and its potential role in delivering contaminants, along the nearshore Gulf of Mexico of the northern Yucatán Peninsula, Mexico using a combination of stable (oxygen-δ18O and hydrogen- δD) and …
Springshed Delineation In A Karst Aquifer In Hays County, Central Texas, Brian A. Smith, Brian B. Hunt, Marcus O. Gary, Douglas A. Wierman, Jeff A. Watson
Springshed Delineation In A Karst Aquifer In Hays County, Central Texas, Brian A. Smith, Brian B. Hunt, Marcus O. Gary, Douglas A. Wierman, Jeff A. Watson
Sinkhole Conference 2020
Hays County is experiencing some of the highest growth rates in the country, and groundwater is the primary option for water in the county. One spring in the study area, Jacob’s Well, experiences periodic cessation of flow due to a combination of drought and pumping from nearby water supply wells. Jacob’s Well is important for ecological and water resources of the region. A springshed delineation study was conducted at the request of the local groundwater conservation district to protect flow at Jacob’s Well from excessive pumping. Much of the flow to Jacob’s Well emanates from a large phreatic cave passage …
Hydrogeologic Connectivity Of Two Major Spring Orifices: Main Barton And Eliza Springs, Texas, Sarah J. Zappitello, David A. Johns, Lindsey Sydow
Hydrogeologic Connectivity Of Two Major Spring Orifices: Main Barton And Eliza Springs, Texas, Sarah J. Zappitello, David A. Johns, Lindsey Sydow
Sinkhole Conference 2020
The subsurface hydrogeologic connection between Main Barton Spring and Eliza Spring has long been known and assumed due to proximity, geologic structure, presence of unique species, water chemistry, and groundwater tracing studies. Fifteen-minute water quality monitoring data from both springs paired with three accidental releases of sediment to the aquifer and resulting changes in spring turbidity provided new information at a higher resolution than previously available. The turbidity response consistently arrived at Eliza Spring 15 minutes after the response at Main Barton Spring; however, our sampling interval was 15 minutes, so the travel time between springs may have been slightly …
The Relationship Between Cave Temperature And Local Atmospheric Mean Temperature In Monsoonal China, Binggui Cai, Miafoa Li, Yanghong Chen, Yongli Gao
The Relationship Between Cave Temperature And Local Atmospheric Mean Temperature In Monsoonal China, Binggui Cai, Miafoa Li, Yanghong Chen, Yongli Gao
Sinkhole Conference 2020
It is widely claimed that temperature inside a deep Karst cave without significant human influence is similar to local mean atmospheric temperature. To test this assumption, we collected temperature data for caves through China from published documents. The difference between cave temperature and local annually mean temperature (ΔT) were then calculated. The results show that theΔT is larger than 2 Celsius degrees for nearly half of caves. Among these caves, ΔT is larger for caves from Northern China than those from southern China. Many of them have underground river. This indicates that underground river may be one of the influencing …
An Artificial Neural Network Approach To Sinkhole Hazard Assessment For East Central Florida, Yong Je Kim, Boo Hyun Nam, Qipeng Phil Zheng
An Artificial Neural Network Approach To Sinkhole Hazard Assessment For East Central Florida, Yong Je Kim, Boo Hyun Nam, Qipeng Phil Zheng
Sinkhole Conference 2020
The state of Florida sits on the karst terrain where soluble bedrocks are underlain; thus, a sinkhole is a common geohazard. These sinkholes have caused damage to property and infrastructure, as well as threatened human life. It is essential to develop a tool for predicting the potential of sinkhole occurrence. This study presents the methodology of the development of the sinkhole hazard model and map. An artificial neural network (ANN) method was employed. A sinkhole inventory map was prepared using Subsidence Incident Reports of Florida Geological Survey (FGS) with GIS. Hydrogeological factors related to soil erosion and stability (or ground …
Sinkhole Investigation After Hurricane Irma, Ryan Shamet, Moataz Soliman, Yongje Kim, Timothy Copeland, Boo Hyun Nam
Sinkhole Investigation After Hurricane Irma, Ryan Shamet, Moataz Soliman, Yongje Kim, Timothy Copeland, Boo Hyun Nam
Sinkhole Conference 2020
In September 2017, Hurricane Irma made landfall on the state of Florida. This extreme weather event produced an average of 20-40 centimeters of rainfall across the state. In the following weeks, at least 30 new sinkholes were reported throughout the affected area. An investigation of the sinkhole sites where openings occurred in the middle of a roadway, was carried-out. Multiple cone penetration tests (CPT) were performed at those collapsed sites. In this paper, a comprehensive case study of a sinkhole collapse is presented. First, a hydrogeological assessment on the sinkhole site was conducted. Second, CPT data were investigated. Particularly, a …
Planning And Construction Control Of Expressways Crossing Karst In Slovenia, Martin Knez, Slabe Tadej
Planning And Construction Control Of Expressways Crossing Karst In Slovenia, Martin Knez, Slabe Tadej
Sinkhole Conference 2020
One of the major finishing projects in Slovenia is to link the country via modern expressways. Almost half of Slovenia is karst and more than half of its supply of water comes from karst aquifers. Slovenia is the home of the Classical Karst region, which gave name to numerous world languages for the type of landscape that develops on carbonate rock and where the science of karstology began to develop. Comprising an important part of our natural and cultural heritage, the sensitive karst landscape demands from us good knowledge and serious effort for its preservation. This paper describes the value …
Relationships Between Sinkhole-Related Features And Activity And Insar-Detected Subsidence Points In West Central Florida, Tonian Robinson, Christine Downs, Talib Oliver-Cabrera, Boya Zhang, Sarah Kruse, Shimon Wdowinski
Relationships Between Sinkhole-Related Features And Activity And Insar-Detected Subsidence Points In West Central Florida, Tonian Robinson, Christine Downs, Talib Oliver-Cabrera, Boya Zhang, Sarah Kruse, Shimon Wdowinski
Sinkhole Conference 2020
Sinkholes in west-central Florida are usually formed from the erosion of overlying soil and sediment into open fissures of dissolved limestone bedrock. They are one of the leading natural disasters in the area, and therefore, precursory detection is crucial to alleviate risks of property damage. Using the Interferometric Synthetic Aperture Radar (InSAR) method, we can detect surface subsidence in selected study areas over which InSAR scenes were captured every 22–45 days over ~two years. InSAR is an airborne remote sensing technique that uses multiple Synthetic Aperture Radar (SAR) images to resolve elevation changes over time. Using the Persistent Scatterer Interferometry …
Characterizing Near-Surface Karst System Under Three Stormwater Retention Basins In Silver Springs, Florida, Mohammad Shokri, Yuan Gao, Kelly M. Kibler, Dingbao Wang, Ni-Bin Chang
Characterizing Near-Surface Karst System Under Three Stormwater Retention Basins In Silver Springs, Florida, Mohammad Shokri, Yuan Gao, Kelly M. Kibler, Dingbao Wang, Ni-Bin Chang
Sinkhole Conference 2020
Water resources in karst systems are particularly vulnerable to contamination by polluted surface water, such as stormwater runoff, due to their specific geologic and hydrogeological characteristics. Better understanding of near-surface karst systems may inform contaminant transport and protective management of karst aquifers and springs. Ground penetrating radar (GPR) and electromagnetic (EM) geophysical data were collected in three stormwater retention basins within the Silver Springs springshed in Florida to investigate configuration of the near-surface karst system. The reported sinkhole data indicated 14 sinkhole occurrences with diameter ranging from 0.6 to 6 m in Basin 1, 11 sinkholes with diameter ranging from …
A Procedure For Evaluating Land Disturbances At The Site Level In Forested Karst Areas Of British Columbia, Canada, Tim Stokes
Sinkhole Conference 2020
Land disturbances in karst can result in considerable adverse ecological impacts if the nature and characteristics of karst systems and processes are not considered. This is particularly the case for the well-developed and forested karst of coastal British Columbia (BC). Industrial forestry activities in the region typically comprise of building logging roads, harvest openings (or cut blocks) and post-harvest silviculture treatments. In conjunction with the BC Ministry of Forests, Lands, Natural Resource Operations and Rural Development, an evaluation procedure has been developed to assess whether current forestry practices are adequately protecting and maintaining karst surface and subsurface system elements at …
Using Soil Moisture Observations To Characterize Groundwater Recharge Processes At Five Contrasting Climate Regions, Romane Berthelin, Mirjam Scheller, Justine Berg, Andreas Hartmann
Using Soil Moisture Observations To Characterize Groundwater Recharge Processes At Five Contrasting Climate Regions, Romane Berthelin, Mirjam Scheller, Justine Berg, Andreas Hartmann
Sinkhole Conference 2020
Karst groundwater constitutes a considerable fraction of drinking water in many regions in the world. Understanding its recharge processes is important for a sustainable water resource management. Experimental approaches to study karst aquifers mostly focus on the characterization of the entire aquifer using the disintegration of its output signal measured at the spring. Despite the important role of the soil and epikarst for recharge processes, limited attention has been given to this specific part of the systems. In our study, we present the first results of a soil monitoring program at five representative locations across the globe. We use a …
Combining High Resolution Spring Monitoring, Dye Tracing, Watershed Analysis, And Outcrop And Borehole Observations To Characterize The Galena Karst, Southeast Minnesota, Usa, John D. Barry, Tom P. Miller, Julia R. Steenberg, Anthony C. Runkel, Kevin J. Kuehner, E. Calvin Alexander Jr.
Combining High Resolution Spring Monitoring, Dye Tracing, Watershed Analysis, And Outcrop And Borehole Observations To Characterize The Galena Karst, Southeast Minnesota, Usa, John D. Barry, Tom P. Miller, Julia R. Steenberg, Anthony C. Runkel, Kevin J. Kuehner, E. Calvin Alexander Jr.
Sinkhole Conference 2020
A combination of spring monitoring and springshed delineation using dye tracing and hydrograph separation methods has elucidated aquifer characteristics of the Ordovician Galena Group in southeast Minnesota. The Galena Group is primarily composed of carbonate rock with subordinate beds of fine siliciclastics, mainly shale. It underlies eleven counties in southeastern Minnesota and is used as a source of water for domestic and agricultural use. In two counties, Fillmore and Olmsted, it is a thinly covered well-developed karst that supplies substantial baseflow to streams. Continuous spring monitoring is being conducted to measure aquifer properties and recharge response following precipitation and snowmelt …
Regulation Of Large Dairy Farms In Karst Regions Of The United States, Jesse J. Richardson Jr.
Regulation Of Large Dairy Farms In Karst Regions Of The United States, Jesse J. Richardson Jr.
Sinkhole Conference 2020
During the past several years, an increasing number of large dairy farms have located, or proposed to locate, in karst terrain in the Midwestern United States. The large amounts of manure produced by such dairy farms proves especially problematic to groundwater in karst terrain. Controversies have erupted in Minnesota, Illinois, and Wisconsin, among other states. In response to the proposed dairies, citizen groups have filed a number of lawsuits against the dairy operators, the dairy industry has filed lawsuits against state agencies, and states have enacted heightened regulations for dairy operations in karst. The majority of the debates have centered …
Karst Water Resource Management And Sustainable Educational Practices In Nine Yucatec Maya Communities, Khristin Nicole Landry Montes, Patricia A. Mcanany, Dylan J. Clark, Iván Batún Alpuche
Karst Water Resource Management And Sustainable Educational Practices In Nine Yucatec Maya Communities, Khristin Nicole Landry Montes, Patricia A. Mcanany, Dylan J. Clark, Iván Batún Alpuche
Sinkhole Conference 2020
The karst landscape of Yucatán, Mexico is dotted with thousands of sinkholes that provide access to fresh water. These features, called “cenotes” in Spanish and “dz’onot” in Yucatec Maya, range from subterranean caverns with well-developed speleothems to open-air sinkholes. While there is a variety of cenote types, all are connected to the subterranean freshwater aquifer. The interconnectivity of cenotes magnifies the impact of cenote contamination. Because of their significance as water sources, cenotes were conceived by ancient Maya peoples as important portals to powerful supernatural forces and guardians of rain. Today, cenotes remain culturally important and are located near the …
Cave Air Co2 Monitoring In Shenqi Cave, Southwest China, Liangcheng Tan, Jingyao Zhao, Dong Li, Yongli Gao
Cave Air Co2 Monitoring In Shenqi Cave, Southwest China, Liangcheng Tan, Jingyao Zhao, Dong Li, Yongli Gao
Sinkhole Conference 2020
Monthly in situ monitoring of cave air CO2 and drip water chemistry were carried out in Shenqi Cave, Sichuan, southwest China, during a hydrological year from April 2016 to December 2016. Results indicate that the cave temperature (~11.7°C) and relative humidity (~100%) were stable during the whole year. The air CH4 concentrations changed from ~2000ppb outside the cave to ~500ppb inside the cave. The average CO2 concentrations varied from ~550ppm in winter to ~1200ppm in summer, with their δ13C values from ~ –15‰ to ~ –21‰, indicating the influences of seasonal biologic activities and cave …