Results 31 to 40 of about 932 (186)

Droughts and human impact in the ancient Uaymil region of the Maya lowlands inferred from a 2800‐year sedimentary archive at Lake Kaná, Mexico

Boreas, EarlyView.
The relationship between the climate and societal transformation in Maya lowlands has long been debated, particularly the role of drought in shaping the civilization trajectory during the Classic Period. A high‐resolution, multi‐proxy, geochemical record from Lake Kaná, located in the underexplored Uaymil region of the Yucatán Peninsula in Mexico ...
Haydar B. Martinez‐Dyrzo, Priyadarsi D. Roy, Benjamin Gwinneth, Irma G. Vargas‐Martinez, Alejandro A. Aragon‐Moreno, Roger Medina‐Gonzales   +5 more
wiley   +1 more source

Research progress of nitrate tracing in karst groundwater based on CiteSpace

Carsologica Sinica
Nitrate (\begin{document}${\rm{NO}}_3^{-}$\end{document}) is one of the main pollutants in groundwater; therefore, once \begin{document}${\rm{NO}}_3^{-}$\end{document} concentrations exceed an acceptable level, it will have adverse effects on water ...
Pingheng YANG, Maosong HUA, Weiqun LUO, Wenjing GUO   +3 more
doaj   +1 more source

Scientists’ warning on the global destruction of rock outcrop ecosystems

Conservation Biology, EarlyView.
Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula, Lucas N. Perillo, Gianluigi Ottaviani, Flávio F. Carmo, Mandar N. Datar, Katherine C. Enebeli‐Ekwutoziam, Bruno Fogliani, Stephen D. Hopper, Aboli Kulkarni, Hans Lambers, Rafael F. Magalhães, Frederico S. Neves, Jean‐François Ponge, Stefan Porembski, Bruno H. P. Rosado, Fernando M. G. Santos, Elycée Tindano, Bram Vanschoenwinkel, Aparna Watve, Fernando A. O. Silveira   +19 more
wiley   +1 more source

Karst and agriculture in Australia. [PDF]

International Journal of Speleology, 1999
Much of the development and degradation of karst lands in Australia has occurred in the last two centuries since European settlement. Recent prolonged El Nino events add further climatic uncertainty and place real constraints on sustainable agriculture ...
Gillieson David, Thurgate Mia
doaj  

Potential influence of a planned landfill on a high karst plateau in Southwestern Montenegro to nearby karstic springs

Acta Carsologica, 2021
The potential threat of a landfill projected on a high karst plateau in southwest Montenegro is investigated with respect to the subjacent nearby springs. The locality is called Duboki do.
Micha Horacek, Milan Radulovic, Dejan Jancic, Stefan Wyhlidal, Golub Culafic   +4 more
doaj   +1 more source

Imaging Point Source Groundwater Discharges in a Confined Coastal Aquifer Using Electrical Resistivity

Groundwater, EarlyView.
Marine electrical resistivity tomography (ERT) is applied to characterize point‐source submarine groundwater discharge (PSGD) along NW Yucatán. ERT observations and forward modeling constrain conduit detectability under varying hydrogeological conditions.
Mariana Gómez‐Nicolás, Armando Huitzilt‐Rodriguez, Enrique Iñiguez, Roger Pacheco‐Castro, Marco Pérez‐Flores, Paulo Salles, Fiona Whitaker   +6 more
wiley   +1 more source

Karstifikasi dan Pola Struktur Kuarter Berdasarkan Pemetaan Lapangan dan Citra SRTM Pada Formasi Wapulaka, Pasar Wajo, Buton, Sulawesi Tenggara.

Journal of Earth Energy Engineering, 2017
Karstification process occurs as a result of dissolution on limestone lithology formed in typical morphology of caves, rounded or elongated pits and conical hills.
Yuniarti Yuskar, Tiggi Choanji, Harisma Buburanda   +2 more
doaj   +1 more source

Enhancing Recharge in the Edwards Aquifer, Texas: Measures, Outcomes, and Lessons for Karst Aquifers

Groundwater, EarlyView.
Abstract Managed aquifer recharge is a widely adopted method that involves storing excess water underground for future use. While managed aquifer recharge has been applied globally to different aquifer types, its use in karst aquifers is less common due to the unique hydrogeological characteristics of these systems, including high permeability ...
Neelam Thapa Magar, Robert E. Mace
wiley   +1 more source

A lumped parameter model to evaluate the relevance of excess air as a tracer of exchanged flows between transmissive and capacitive compartments of karst systems

Frontiers in Water, 2022
The objective of this study was to evaluate the relevance of using excess air (EA) for the characterization of drain/matrix exchange in karst systems using a rainfall discharge model coupled with the simulation of EA measured at the outlet of the studied
Vianney Sivelle, Laïna Pérotin, Bernard Ladouche, Bernard Ladouche, Véronique de Montety, Vincent Bailly-Comte, Vincent Bailly-Comte, Cédric Champollion, Hervé Jourde   +8 more
doaj   +1 more source

Leaky Sewers Hydraulically Disconnect from Groundwater: A Proof‐of‐Concept

Groundwater, EarlyView.
In this study, we newly demonstrate that leaky pipes can become hydraulically disconnected from the underlying groundwater—a phenomenon analogous to river–groundwater interactions. Through numerical modeling, we show that, as the groundwater table declines, the leakage flux from the pipe (in absolute terms) initially increases until a critical depth ...
Aaron Peche, Fritz Kalwa, Syed Mohaiminul Islam, Georg Houben, Thomas Graf, Sven Altfelder   +5 more
wiley   +1 more source