| Description |
v, 123 leaves : illustrations, maps ; 28 cm |
| Summary |
"Little is known about the effect of carbonate karst terrain on water quality in the United States. Karst topography occurs over a large portion of Missouri and over a significant part of other midwestern states. The objectives of this study were the determination of the quality of surface and subsurface water in carbonate karst terrain and the investigation and evaluation of the effect of rainfall and runoff on water quality in the Meramec Spring area, east of Rolla, Missouri, during both the dry and wet seasons over the period of one year. Water samples were collected at a large number of stream, spring, and well sampling points; twenty different tests were performed in order to determine the chemical, physical, and bacteriological quality of the water. The procedures recommended in the Standard Methods for the Examination of Water and Wastewater were genially used; rapid, short-cut methods were, however, substituted in some cases. The results were statistically analyzed to determine average, maximum and minimum values, standard deviation, and 95% confidence intervals. The main ions of the waters in this carbonate karst area were bicarbonate, calcium, and magnesium; the waters could be classified as either HCO₃-Ca-Mt or HCO₃-Mg-Ca. The surface waters, we well as the spring and some of the well waters, were contaminated as evidenced by the presence of coliform and fecal streptococcal organisms. Surface water quality varied significantly between the dry and wet seasons, while the quality of subsurface water collected from wells was uniform throughout the year. The quality of spring waters was affected by rainfall, indicating that direct pathways existed between surface and subsurface supplies. The nitrate nitrogen concentration in many wells was high"--Abstract, leaf [i]. |
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