Application of Nonparametric Statistical Tests in Hydrogeology

Siddiqui, S. H.; Parizek, Richard R.

doi:10.1111/j.1745-6584.1972.tb02911.x

Cited by 13 publications

(8 citation statements)

References 3 publications

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“…Measurements were made every minute and averaged over a 15 min interval, and their reliability was checked against manual water table measurements. Kruskall-Wallis and Mann-Whitney tests (after Siddiqui and Parizek 1972) allowed differences in pond water tables to be assessed when 2005 and 2006 water table data were pooled.…”

Section: Methodsmentioning

confidence: 99%

Hydrologic Thresholds of Ponds in a Polar Desert Wetland Environment, Somerset Island, Nunavut, Canada

Young

Abnizova

2011

Wetlands

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Evaluation of the water storage in several ponds near Creswell Bay, Somerset Island, Canada, an area experiencing a polar desert climate (cool, moist), served to reveal factors that are important in the sustainability of these freshwater ecosystems within a larger wetland complex. Our study focused on the hydrology of 12 ponds of different sizes in various geomorphologic settings: moraine, bedrock, and coastal areas. A positive water balance plays an important role in the survival of the ponds experiencing variable climatic conditions and survival over the season depends largely on the local enrichment of water through various hydrologic linkages. Pond inputs and losses are governed by the pond catchment topography, substrate, hydrology, and seasonal climatic conditions. Low hydrologic energy and long hydroperiod (e.g., ponds in surface-flow dominated systems with multiple hydrologic linkages) are associated with a high degree of pond sustainability. Ponds with high hydrologic energy and short hydroperiods (e.g., ponds in precipitation and groundwaterdominated systems) show limited hydrologic sustainability. We suggest that these latter ponds in this polar desert environment will be the most vulnerable to future climate warming in the Canadian High Arctic.

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Section: Methodsmentioning

confidence: 99%

Hydrologic Thresholds of Ponds in a Polar Desert Wetland Environment, Somerset Island, Nunavut, Canada

Young

Abnizova

2011

Wetlands

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“…Well yields in primarily limestone rock along the axes of anticlines are found to be appreciably larger than those along axes of synclines (Clark and others, 1976). Siddiqui and Parizek (1972) found that variation in structural control is not a statistically significant factor in the productivity of wells not located on fracture traces. Ground-water flow in Morgan County may occur through fracture sets that parallel anticlinal axes.…”

Section: Relation Of Geology To Ground-water Flowmentioning

confidence: 90%

Hydrogeology, Aquifer Geochemistry, and Ground-Water Quality in Morgan County, West Virginia

Boughton¹,

McCoy²

2006

Scientific Investigations Report

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Private and public wells throughout Morgan County, W. Va., were tested to determine aquifer hydraulic, geochemical, and water-quality characteristics. The entire study area is located in the Valley and Ridge Physiographic Province, a region of complex geologic structure and lithology. Aquifers in the study area are characterized by thin to thick bedded formations with interbedding among the various limestones, shales, sandstones, and siltstones that are folded into a series of steeply dipping north-south trending anticlines and synclines. Zones of groundwater production typically consist of one to two fracture sets, with little to no production from unfractured bedrock matrix. Measurements of transmissivity range from 2 to 1,490 feet squared per day, with the larger transmissivities occurring near bedding contacts and in zones with cross-faulting or jointing. Ground water flows from recharge areas in the uplands to local drainages and to deeper flow systems that appear to be controlled by regional geologic structure. The overall flow direction is from south to north within the study area. Ground water within the study area is predominantly a calcium-bicarbonate type water reflecting contact with carbonate rocks. Sodium-bicarbonate and calcium-magnesium-sulfate end-members also exist, with many samples exhibiting mixing, which may be the result of flow between the differing rock types or within units containing both carbonate rocks and shales. Values of water-quality characteristics that were greater than U.S. Environmental Protection Agency drinking-water standards included radon-222, pH, turbidity, iron, manganese, aluminum, and total-and fecal-coliform and Escherichia coli (E. coli) bacteria. Concentrations of radon-222 were detected in all samples from all units, with the largest concentrations (1,330 and 2,170 picocuries per liter) from the Clinton Formation.

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“…Parametric statistical tests like one-way ANOVA and t test (Siddiqui and Parizek 1974;Knopman and Hollyday 1993) and non-parametric statistical tests such as KruskalWallis test (Siddiqui and Parizek 1972;Knopman and Hollyday 1993) can efficiently monitor the difference in well performances in different hydrogeological conditions. These techniques are used in the present study to verify if differences in WLF under different geological parameters are statistically significant or not.…”

Section: Methodsmentioning

confidence: 99%

Hydrogeological factors: their association and relationship with seasonal water-table fluctuation in the composite hardrock Aravalli terrain, India

Bhuiyan

2009

Environ Earth Sci

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Seasonal rise of groundwater level manifests aquifer recharge through infiltration. Spatial variation of aquifer recharge within the same basin or terrain is a function of terrain heterogeneity governed by different hydrogeological factors. However, assessment of relations between water-level fluctuations (WLF) with various hydrogeological factors is not straightforward. In the present study, various hydrogeological factors that could influence aquifer recharge in the deformed crystalline Aravalli terrain of India have been analysed. Frequency plots have been used to assess the variations in WLF under different geological parameter classes. Seasonal WLF associated with these factors have been compared using various statistical parameters. Parametric and non-parametric statistical tests have been used to determine the statistical significance of fluctuation difference. The study infers that saturated thickness, lineament, lineament-intersection, and drainage beside surface elevation and well depth are the main geological factors influencing aquifer recharge in the Aravalli terrain. Median values under these factors are integrated and compared with the interpolated values of mean WLF at hypothetical well locations. They are found to closely resemble each other. This infers capability and applicability of the technique in identifying key factors governing WLF, and in predicting WLF at unexplored locations.

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Application of Nonparametric Statistical Tests in Hydrogeology

Cited by 13 publications

References 3 publications

Hydrologic Thresholds of Ponds in a Polar Desert Wetland Environment, Somerset Island, Nunavut, Canada

Hydrologic Thresholds of Ponds in a Polar Desert Wetland Environment, Somerset Island, Nunavut, Canada

Hydrogeology, Aquifer Geochemistry, and Ground-Water Quality in Morgan County, West Virginia

Hydrogeological factors: their association and relationship with seasonal water-table fluctuation in the composite hardrock Aravalli terrain, India

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