Groundwater Contamination in Karst Terranes

Green, Ronald T.; Painter, S. L.; Sun, Alexander Y.; Worthington, Stephen R. H.

doi:10.1007/s11267-005-9004-3

Cited by 56 publications

(36 citation statements)

References 8 publications

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“…A tracer test was then conducted, but the unexpectedly high tracer velocity of 366 m/d resulted in high dye concentrations at the pumping well and early termination of the tracer test (Green et al, 2006;Renken et al, 2008). Flow and transport in the aquifer were subsequently modeled using MODFLOW, with turbulent flow being simulated using Conduit Flow Process (Shoemaker et al, 2008a,b).…”

Section: Pleistocene Limestone At Miami Florida Usamentioning

confidence: 99%

Diagnostic tests for conceptualizing transport in bedrock aquifers

Worthington¹

2015

Journal of Hydrology

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Section: Pleistocene Limestone At Miami Florida Usamentioning

confidence: 99%

Diagnostic tests for conceptualizing transport in bedrock aquifers

Worthington¹

2015

Journal of Hydrology

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“…The objective of "water conservation" in the field of water and soil conservation is to protect green water resources [11]. In karst regions, the unique karst geological structures of the area result in considerable soil and water loss [12,13] because karst limestone facilitates leakage and erosion, allowing precipitation to escape in the form of leakage (blue water) through its underground drainage system [14][15][16], which is the main cause of local shortages of surface water [17,18]. Specific to degraded karst areas where rocky desertification is generally distributed [19], the degradation of vegetation and thin soil cover further increase precipitation leakage.…”

Section: Introductionmentioning

confidence: 99%

Conversion of Blue Water into Green Water for Improving Utilization Ratio of Water Resources in Degraded Karst Areas

Chen

Yang

Zhao

et al. 2016

Water

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Vegetation deterioration and soil loss are the main causes of more precipitation leakages and surface water shortages in degraded karst areas. In order to improve the utilization of water resources in such regions, water storage engineering has been considered; however, site selection and cost associated with the special karstic geological structure have made this difficult. According to the principle of the Soil Plant Atmosphere Continuum, increasing both vegetation cover and soil thickness would change water cycle process, resulting in a transformation from leaked blue water (liquid form) into green water (gas or saturated water form) for terrestrial plant ecosystems, thereby improving the utilization of water resources. Using the Soil Vegetation Atmosphere Transfer model and the geographical distributed approach, this study simulated the conversion from leaked blue water (leakage) into green water in the environs of Guiyang, a typical degraded karst area. The primary results were as follows: (1) Green water in the area accounted for <50% of precipitation, well below the world average of 65%; (2) Vegetation growth played an important role in converting leakage into green water; however, once it increased to 56%, its contribution to reducing leakage decreased sharply; (3) Increasing soil thickness by 20 cm converted the leakage considerably. The order of leakage reduction under different precipitation scenarios was dry year > normal year > rainy year. Thus, increased soil thickness was shown effective in improving the utilization ratio of water resources and in raising the amount of plant ecological water use; (4) The transformation of blue water into green water, which avoids constructions of hydraulic engineering, could provide an alternative solution for the improvement of the utilization of water resources in degraded karst area. Although there are inevitable uncertainties in simulation process, it has important significance for overcoming similar problems.

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“…However, a combination of bedrock porosity and high hydrologic conductivity allow contaminants to penetrate limestone bedrock and move through karst conduit systems quickly, especially during periods of high velocity flow (Vesper et al, 2001). For this reason, karst hydrologic systems are often associated with channeled non-point source groundwater pollution (Green et al, 2006;Worthington, 2011).…”

Section: Introductionmentioning

confidence: 99%