Sources of groundwater and characteristics of surface-water recharge at Bell, White, and Suwannee Springs, Florida, 2012–13

2016 ◽  
Author(s):  
John F. Stamm ◽  
W. Scott McBride
Keyword(s):  
Author(s):  
Ugwu Samson Nnaemeka ◽  
Anyadike Chinenye ◽  
Ugwuishiwu Boniface ◽  
Ndulue Emeka

The wastewater from industries varies so greatly in both flow and pollution strength. So, it is impossible to assign fixed values to their constituents. It is necessary to pretreat the wastes prior to release to the municipal system since lack of adequate treatment of the effluent can cause deterioration of the ecosystem, die off and contamination of the aquatic environment. These adverse effects necessitated the study of wastewater effect on surface water body at Emene Industrial Layout, Enugu State, Nigeria. Wastewater samples were collected, analyzed and compared with the plot of treatment means. The results obtained from the study were compared with WHO and NIS 554 water standards. The wastewater analysis suggested that contaminant at the untreated stage was very high. The results of the treated and river sample were within the WHO and NIS 554 allowable water ranges. Samples at discharge point recorded increased values which suggest high re-contamination along the open channel (from non-point sources) before discharge. This calls for proper monitoring and treatment of the industrial effluent prior to ground water recharge or discharge to surface water.


1999 ◽  
Vol 77 (8) ◽  
pp. 1233-1239 ◽  
Author(s):  
James S Baxter ◽  
J D McPhail

We measured survival of bull trout (Salvelinus confluentus) embryos to the alevin stage in areas selected and not selected by females for spawning. In this study we tested the hypotheses that (1) females are utilizing habitats influenced by discharging groundwater and that (2) there is a reproductive advantage to spawning at these selected sites. Embryo survival was assessed by placing fertilized eggs in capsules that could be retrieved once they were placed in selected and nonselected locations. The survival rate was significantly higher (88.6 vs. 76.1%) and less variable in the selected area, but alevin lengths did not differ significantly between areas. The selected areas were, on average, locations of groundwater discharge and higher water temperatures over the incubation period, while nonselected locations were in areas of surface-water recharge and lower water temperatures. The results suggest that appropriate reproductive habitats which offer the best incubation environments may be limited in bull trout systems, and that site selection by females may increase fitness and be critical for population viability.


Author(s):  
Silvie Heviánková ◽  
Marian Marschalko ◽  
Jitka Chromíková ◽  
Miroslav Kyncl ◽  
Michal Korabík

Author(s):  
John M. Wehrung ◽  
Richard J. Harniman

Water tables in aquifer regions of the southwest United States are dropping off at a rate which is greater than can be replaced by natural means. It is estimated that by 1985 wells will run dry in this region unless adequate artificial recharging can be accomplished. Recharging with surface water is limited by the plugging of permeable rock formations underground by clay particles and organic debris.A controlled study was initiated in which sand grains were used as the rock formation and water with known clay concentrations as the recharge media. The plugging mechanism was investigated by direct observation in the SEM of frozen hydrated sand samples from selected depths.


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