Radium isotopes (Ra, Ra, Ra, and Ra) and water chemistry were used to identify two chemically distinct sources of submarine groundwater discharge (SGD) in Celestún Lagoon, Yucatán, Mexico. Low salinity groundwater discharging from springs within the lagoon has previously been identified and extensively sampled for nutrient concentrations. However, a second type of groundwater discharging into t...

Five karstification phases are recognized and analysed in the Mesozoic carbonate sequences of the External and Internal Subbetic (Betic Cordilleras, southern Spain). These phases are related to important stratigraphic discontinuities in the following ages: (1) Intra-Carixian, (2) Early–Middle Jurassic boundary, (3) late Bathonian–early Callovian, (4) Intra-Kimmeridgian, and (6) late Albian. The...

Karst is a hydrogeological environment of importance not only for its water resources potential but also for its scenic and economic potential, thereby increasing the intensity of human impact. The uniqueness of karst in this regard stems from its high sensitivity and vulnerability to imposed pressures and its distinctive response to these pressures. Therefore, a clear definition and formulatio...

To explore the effect and applicability of contour reverse slope terraces in water soil conservation karstic red clay area northern Guangxi, rainfall simulation experiments were conducted on bare slopes laid with to find erosion pattern response different intensities (15, 30, 50 mm/h) bedrock porosities (1%, 3%, 5%). The results showed that can change spatial distribution surface runoff, divert...

The response of stream ecosystems to climate change will depend in part on groundwater processes that reduce the sensitivity streams atmospheric conditions. We investigated thermal across a gradient inputs defined by karst terrain (carbonate parent materials) headwaters Potomac River basin eastern North America. collected temperature data and quantified for 30 sites from relationship between da...

On Cozumel Island, access to freshwater depends on the extraction of resource from aquifer located north island (catchment area). Water management must be based updated knowledge indicator dynamics related recharge aquifer, groundwater and distribution resource. In this study, trends, variations time series 30 years monthly data for precipitation, temperature, evapotranspiration, estimated were...

introduction in several perspectives including geographical determinism, possibilism, exceptionalism, ecological and other views, it is discussed about understanding how human and the environment interact. human in dealing with different environments, depending on the capabilities of environment and existing tools and techniques, adopt themselves with the nature or interfere in it. karst landsc...