Sistema Zacatón in north-eastern Mexico is host to several deep, water-filled, anoxic, karstic sinkholes (cenotes). These cenotes were explored, mapped, and geochemically and microbiologically sampled by the autonomous underwater vehicle deep phreatic thermal explorer (DEPTHX). The community structure of the filterable fraction of the water column and extensive microbial mats that coat the ceno...

In coastal regions, ecological quality and economic development are highly sensitive to the quality of seawater, which often depends on the discharge of anthropogenic pollution through marine outfalls. This is the case of Cullera Bay (Spanish Mediterranean coast), where bacterial pollution problems are frequent during the tourist season due to its physical configuration, prevailing meteorologic...

We illustrate the importance of subsurface refuges for conservation of aquatic fauna with our studies of karstic wetlands in Everglades National Park, Florida, USA. Managers have proposed that water levels there should not fall more than 46 cm below ground level for more than 90 days annually. In four areas, 84% of solution holes were less than 46 cm deep and holes deeper than 1m were rare (<3 ...

Significant land use changes, mainly in the form of changing agricultural practices, are transforming a semi-arid karstic environment in NE Spain that encloses numerous saline lakes (playa lakes), forming a unique habitat. The introduction of irrigation systems in an area characterized by a semiarid climate, closed basin hydrology, and karstic geology of evaporitic sediments, is changing the wa...

The tropical karstic lakes on the Mexican Caribbean Sea coast are numerous. However, there is an enormous gap of knowledge about their limnological conditions and micro-algae communities. In the present study, surface water samples were collected monthly from November 2007 to September 2008 to provide taxonomical composition and biovolume of planktonic cyanobacteria of the lake Lagartos from St...

Vulnerability assessment has become an important element for wise resource management and land use planning. This work examined the sensitivity of karstic aquifers, in the area of Irbid governorate northwest Jordan, to surface contamination by applying the EPIK method, and then compared this susceptibility evaluation to water-chemistry data collected from wells and springs within the area. An a...

Herbicides are used to increase the yield of crops and pastures. The herbicide 2, 4-D has high leaching potential in karstic environments because it is water soluble, which causes that been found groundwater submerged caves Yucatan Peninsula. We detected presence agricultural non-agricultural zones northeaster Yucatán Peninsula by using UV spectrum obtained from HPLC-DAD as qualitative indicato...

We study the well-posedness of a coupled Cahn-Hilliard-Stokes-Darcy system which is a di↵use-interface model for essentially immiscible two phase incompressible flows with matched density in a karstic geometry. Existence of finite energy weak solution that is global in time is established in both 2D and 3D. Weak-strong uniqueness property of the weak solutions is provided as well.